chore: update deps

* chore: remove lit & fast reference in readme

* chore: remove sourcehut build automation

* chore(docs): various changes

* chore: update attribution

.build.yml

@@ -0,0 +1,35 @@
+image: alpine/edge
+packages:
+  - nodejs
+  - npm
+  - pnpm
+secrets:
+  - 34883663-8684-41cb-9920-8e96345ef166
+  - bbfcb6dc-7c4a-42ee-a11a-022f0339a133
+environment:
+  NETLIFY_SITE_ID: bfd69adf-f754-433c-9690-63426f0d2fa0
+  GH_USER: ayoayco
+  REPO: wcb
+tasks:
+  - push-mirror: |
+      cd ~/"${REPO}"
+      git config --global credential.helper store
+      git push --mirror "https://github.com/${GH_USER}/${REPO}"
+  - install-deps: |
+      cd ~/"${REPO}"
+      pnpm i --ignore-scripts
+  - test: |
+      cd ~/"${REPO}"
+      npx vitest run
+  - build: |
+      cd ~/"${REPO}"
+      pnpm -F docs build
+  - deploy: |
+      cd wcb
+      {
+        set +x
+        . ~/.buildsecrets
+        set -x
+      }
+      export NETLIFY_AUTH_TOKEN
+      pnpm -F docs run deploy

.gitignore

@@ -1,5 +1,18 @@
+node_modules/
+dist/
+
 # temporary files
 *~
 *swo
 *swp
 
+# nitro site
+*.log*
+.nitro
+.cache
+.output
+.env
+.eslintcache
+
+# vitest
+coverage

.husky/pre-commit

@@ -0,0 +1,4 @@
+npm run lint --cache
+npm run test
+npm run build
+npx size-limit

.npmignore

@@ -0,0 +1,19 @@
+node_modules/
+examples/
+assets/
+src/
+.vscode/
+tsconfig.json
+
+# temporary files
+*~
+*swo
+*swp
+
+# nitro site
+site/
+*.log*
+.nitro
+.cache
+.output
+.env

.prettierignore

@@ -0,0 +1,7 @@
+# someday let's think about formatting html
+**/*.html
+
+**/*.md
+**/*.css
+**/*.yml
+**/*.yaml

.vscode/settings.json

@@ -1,3 +1,4 @@
 {
-    "editor.formatOnSave": true
+  "js/ts.implicitProjectConfig.checkJs": true,
-}
+  "editor.formatOnSave": true
+}

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Ayo Ayco
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,119 +1,39 @@
-Web Component Base
+# Web Component Base
+
+[![Package information: NPM version](https://img.shields.io/npm/v/web-component-base)](https://www.npmjs.com/package/web-component-base)
+[![Package information: NPM license](https://img.shields.io/npm/l/web-component-base)](https://www.npmjs.com/package/web-component-base)
+[![Package information: NPM downloads](https://img.shields.io/npm/dt/web-component-base)](https://www.npmjs.com/package/web-component-base)
+[![Bundle Size](https://img.shields.io/bundlephobia/minzip/web-component-base)](#library-size)
+
+🤷‍♂️ zero-dependency, 🤏 tiny JS base class for creating reactive [custom elements](https://developer.mozilla.org/en-US/docs/Web/API/Web_Components/Using_custom_elements) easily ✨
+
+![counter example code snippet](https://git.sr.ht/~ayoayco/wcb/blob/main/assets/IMG_0682.png)
+
+When you extend the `WebComponent` class for your component, you only have to define the `template` and `properties`. Any change in any property value will automatically cause just the component UI to render.
+
+The result is a reactive UI on property changes.
+
+## Links
+
+- [Documentation](https://webcomponent.io)
+- [Read a blog explaining the reactivity](https://ayos.blog/reactive-custom-elements-with-html-dataset/)
+- [View demo on CodePen](https://codepen.io/ayoayco-the-styleful/pen/ZEwoNOz?editors=1010)
+
+## Want to get in touch?
+
+There are many ways to get in touch:
+
+1. Open a [GitHub issue](https://github.com/ayoayco/wcb/issues/new) or [discussion](https://github.com/ayoayco/wcb/discussions)
+1. Submit a ticket via [SourceHut todo](https://todo.sr.ht/~ayoayco/wcb)
+1. Email me: [ayo@ayco.io](mailto:ayo@ayco.io)
+1. Chat on Discord: [Ayo's Projects](https://discord.gg/kkvW7GYNAp)
+
+## Inspirations and thanks
+
+1. [htm](https://github.com/developit/htm) - I use it for the `html` function for tagged templates, and take a lot of inspiration in building the rendering implementation. It is highly likely that I will go for what Preact is doing... but we'll see.
+1. [fast](https://github.com/microsoft/fast) - When I found that Microsoft has their own base class I thought it was super cool!
+1. [lit](https://github.com/lit/lit) - `lit-html` continues to amaze me and I worked to make `wcb` generic so I (and others) can continue to use it
+
 ---
-This is a very minimal base class for creating reactive custom elements easily.
+*Just keep building.*<br>
-
+*A project by [Ayo](https://ayo.ayco.io)*
-When you extend the `WebComponent` class for your component, you only have to define the `template()` and `observedAttributes()`, and changes in any attribute value will automatically cause the UI to render.
-
-The result is a reactive UI on attribute changes.
-
-## Table of Contents
-1. [Vanilla JS import](#vanilla-js-import)
-1. [Installation](#installation)
-1. [Usage](#usage)
-1. [Life-Cycle Hooks](#life-cycle-hooks)
-    1. [`onInit`](#oninit) - the component is connected to the DOM
-    1. [`onChanges`](#onchanges) - an attribute value changed
-
-## Vanilla JS import
-Import using [unpkg](https://unpkg.com/web-component-base) in your component. We will use this in the rest of our [usage examples](#usage).
-
-```js
-import WebComponent from "https://unpkg.com/web-component-base";
-```
-
-## Installation 
-If you have a bundler to help resolving imports:
-
-```bash
-npm i web-component-base
-```
-
-## Usage
-
-
-In your component class:
-
-```js
-// HelloWorld.mjs
-import WebComponent from "https://unpkg.com/web-component-base";
-
-class HelloWorld extends WebComponent {
-  name = "World";
-  emotion = "excited";
-
-  static get observedAttributes() {
-    return ["name", "emotion"];
-  }
-
-  get template() {
-    return `
-        <h1>Hello ${this.name}${this.emotion === "sad" ? ". 😭" : "! 🙌"}</h1>`;
-  }
-}
-
-customElements.define('hello-world', HelloWorld);
-```
-
-
-In your HTML page:
-
-```html
-<head>
-  <script type="module" src="HelloWorld.mjs"></script>
-</head>
-<body>
-  <hello-world name="Ayo" emotion="sad">
-  <script>
-      const helloWorld = document.querySelector('hello-world');
-
-      setTimeout(() => {
-        helloWorld.setAttribute('emotion', 'excited');
-      }, 2500)
-  </script>
-</body>
-```
-
-The result is a reactive UI that updates on attribute changes:
-
-<img alt="UI showing feeling toward Web Components changing from SAD to EXCITED" src="https://git.sr.ht/~ayoayco/web-component-base/blob/main/assets/wc-base-demo.gif" width="400" />
-
-## Life-Cycle Hooks
-
-Define behavior when certain events in the component's life cycle is triggered by providing hook methods
-
-### onInit()
-- gets triggered when the component is connected to the DOM
-- best for setting up the component
-
-```js
-import WebComponent from "https://unpkg.com/web-component-base";
-
-class ClickableText extends WebComponent {
-  // gets called when the component is used in an HTML document
-  onInit() {
-    this.onclick = () => console.log(">>> click!");
-  }
-
-  get template() {
-    return `<span style="cursor:pointer">Click me!</span>`;
-  }
-}
-```
-
-### onChanges()
-- gets triggered when an attribute value changed
-
-```js
-import WebComponent from "https://unpkg.com/web-component-base";
-
-class ClickableText extends WebComponent {
-  // gets called when an attribute value changes
-  onChanges({attr, prev, curr}) {
-    console.log('>>> something changed', {attr, prev, curr})
-  }
-
-  get template() {
-    return `<span style="cursor:pointer">Click me!</span>`;
-  }
-}
-```

WebComponent.mjs

@@ -1,35 +0,0 @@
-// @ts-check
-
-export class WebComponent extends HTMLElement {
-  get template() {
-    return "";
-  }
-
-  /**
-   * triggered when the component is connected to the DOM
-   */
-  onInit() {}
-
-  /**
-   * triggered when an attribute value changed
-   */
-  onChanges({ property, previousValue, currentValue }) {}
-
-  connectedCallback() {
-    this.render();
-    this.onInit();
-  }
-
-  attributeChangedCallback(property, previousValue, currentValue) {
-    if (previousValue !== currentValue) {
-      this[property] = currentValue;
-      this.render();
-    }
-
-    this.onChanges({ property, previousValue, currentValue });
-  }
-
-  render() {
-    this.innerHTML = this.template;
-  }
-}

demo/HelloWorld.mjs

@@ -1,22 +0,0 @@
-// @ts-check
-import WebComponent from "../index.mjs";
-
-export class HelloWorld extends WebComponent {
-  name = "World";
-  emotion = "excited";
-
-  static get observedAttributes() {
-    return ["name", "emotion"];
-  }
-
-  onChanges({ property, previousValue, currentValue }) {
-    console.log(">>> changed", { property, previousValue, currentValue });
-  }
-
-  get template() {
-    return `
-        <h1>Hello ${this.name}${this.emotion === "sad" ? ". 😭" : "! 🙌"}</h1>`;
-  }
-}
-
-customElements.define("hello-world", HelloWorld);

demo/SimpleText.mjs

@@ -1,14 +0,0 @@
-// @ts-check
-import WebComponent from "../index.mjs";
-
-class SimpleText extends WebComponent {
-  onInit() {
-    this.onclick = () => console.log(">>> click!");
-  }
-
-  get template() {
-    return `<span>Click me!</span>`;
-  }
-}
-
-customElements.define("simple-text", SimpleText);

demo/index.html

@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>WC demo</title>
-    <script type="module" src="HelloWorld.mjs"></script>
-    <script type="module" src="SimpleText.mjs"></script>
-  </head>
-  <body>
-    <hello-world name="Ayo" emotion="sad"></hello-world>
-    <simple-text greeting="hey"></simple-text>
-
-    <script type="module">
-      const helloWorld = document.querySelector("hello-world");
-      setTimeout(() => {
-        helloWorld.setAttribute("emotion", "excited");
-      }, 2500);
-    </script>
-  </body>
-</html>

docs/.gitignore

@@ -0,0 +1,21 @@
+# build output
+dist/
+# generated types
+.astro/
+
+# dependencies
+node_modules/
+
+# logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+
+# environment variables
+.env
+.env.production
+
+# macOS-specific files
+.DS_Store

docs/.vscode/extensions.json

@@ -0,0 +1,4 @@
+{
+  "recommendations": ["astro-build.astro-vscode"],
+  "unwantedRecommendations": []
+}

docs/.vscode/launch.json

@@ -0,0 +1,11 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "command": "./node_modules/.bin/astro dev",
+      "name": "Development server",
+      "request": "launch",
+      "type": "node-terminal"
+    }
+  ]
+}

docs/README.md

@@ -0,0 +1,54 @@
+# Starlight Starter Kit: Basics
+
+[![Built with Starlight](https://astro.badg.es/v2/built-with-starlight/tiny.svg)](https://starlight.astro.build)
+
+```
+npm create astro@latest -- --template starlight
+```
+
+[![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/withastro/starlight/tree/main/examples/basics)
+[![Open with CodeSandbox](https://assets.codesandbox.io/github/button-edit-lime.svg)](https://codesandbox.io/p/sandbox/github/withastro/starlight/tree/main/examples/basics)
+[![Deploy to Netlify](https://www.netlify.com/img/deploy/button.svg)](https://app.netlify.com/start/deploy?repository=https://github.com/withastro/starlight&create_from_path=examples/basics)
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fwithastro%2Fstarlight%2Ftree%2Fmain%2Fexamples%2Fbasics&project-name=my-starlight-docs&repository-name=my-starlight-docs)
+
+> 🧑‍🚀 **Seasoned astronaut?** Delete this file. Have fun!
+
+## 🚀 Project Structure
+
+Inside of your Astro + Starlight project, you'll see the following folders and files:
+
+```
+.
+├── public/
+├── src/
+│   ├── assets/
+│   ├── content/
+│   │   ├── docs/
+│   └── content.config.ts
+├── astro.config.mjs
+├── package.json
+└── tsconfig.json
+```
+
+Starlight looks for `.md` or `.mdx` files in the `src/content/docs/` directory. Each file is exposed as a route based on its file name.
+
+Images can be added to `src/assets/` and embedded in Markdown with a relative link.
+
+Static assets, like favicons, can be placed in the `public/` directory.
+
+## 🧞 Commands
+
+All commands are run from the root of the project, from a terminal:
+
+| Command                   | Action                                           |
+| :------------------------ | :----------------------------------------------- |
+| `npm install`             | Installs dependencies                            |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
+| `npm run build`           | Build your production site to `./dist/`          |
+| `npm run preview`         | Preview your build locally, before deploying     |
+| `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
+| `npm run astro -- --help` | Get help using the Astro CLI                     |
+
+## 👀 Want to learn more?
+
+Check out [Starlight’s docs](https://starlight.astro.build/), read [the Astro documentation](https://docs.astro.build), or jump into the [Astro Discord server](https://astro.build/chat).

docs/astro.config.mjs

@@ -0,0 +1,65 @@
+// @ts-check
+import { defineConfig } from 'astro/config'
+import starlight from '@astrojs/starlight'
+
+// https://astro.build/config
+export default defineConfig({
+  redirects: {
+    '/guides/': '/guides/why',
+  },
+  integrations: [
+    starlight({
+      title: 'WCB (alpha)',
+      social: {
+        npm: 'https://www.npmjs.com/package/web-component-base',
+        sourcehut: 'https://sr.ht/~ayoayco/wcb/',
+        github: 'https://github.com/ayoayco/wcb/',
+        discord: 'https://discord.gg/kkvW7GYNAp',
+      },
+      sidebar: [
+        {
+          label: 'Guides',
+          items: [
+            // Each item here is one entry in the navigation menu.
+            'getting-started',
+            'why',
+            'exports',
+            'usage',
+            'examples',
+            'template-vs-render',
+            'prop-access',
+            'shadow-dom',
+            'styling',
+            'just-parts',
+            'life-cycle-hooks',
+            'library-size',
+          ],
+        },
+        // {
+        //   label: 'Reference',
+        //   autogenerate: { directory: 'reference' },
+        // },
+      ],
+      components: {
+        Footer: './src/components/Attribution.astro',
+      },
+      head: [
+        {
+          tag: 'link',
+          attrs: {
+            rel: 'mask-icon',
+            href: 'mask-icon.svg',
+            color: '#000000',
+          },
+        },
+        {
+          tag: 'link',
+          attrs: {
+            rel: 'apple-touch-icon',
+            href: 'apple-touch-icon.png',
+          },
+        },
+      ],
+    }),
+  ],
+})

docs/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "docs",
+  "type": "module",
+  "version": "0.0.1",
+  "scripts": {
+    "dev": "astro dev",
+    "start": "astro dev",
+    "build": "astro build",
+    "preview": "astro preview",
+    "astro": "astro",
+    "deploy": "netlify deploy --site=$NETLIFY_SITE_ID --dir=dist --prod"
+  },
+  "dependencies": {
+    "@astrojs/starlight": "^0.32.5",
+    "astro": "^5.5.3",
+    "sharp": "^0.32.5"
+  }
+}

docs/public/favicon.svg

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docs/public/mask-icon.svg

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docs/src/components/Attribution.astro

@@ -0,0 +1,14 @@
+---
+import Footer from '@astrojs/starlight/components/Footer.astro'
+---
+
+<Footer />
+
+<footer style="text-align: right; font-style: italic; padding: 0.5em 1em">
+  <p>
+    <small>Released under the MIT License</small>
+  </p>
+  <p>
+    <small>A project by <a href="https://ayo.ayco.io">Ayo</a></small>
+  </p>
+</footer>

docs/src/content.config.ts

@@ -0,0 +1,7 @@
+import { defineCollection } from 'astro:content';
+import { docsLoader } from '@astrojs/starlight/loaders';
+import { docsSchema } from '@astrojs/starlight/schema';
+
+export const collections = {
+	docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
+};

docs/src/content/docs/guides/examples.md

@@ -0,0 +1,59 @@
+---
+title: Examples
+slug: examples
+---
+
+### 1. To-Do App
+
+A simple app that allows adding / completing tasks:
+[View on CodePen ↗](https://codepen.io/ayoayco-the-styleful/pen/GRegyVe?editors=1010)
+
+![To-Do App screen recording](https://raw.githubusercontent.com/ayoayco/web-component-base/main/assets/todo-app.gif)
+
+### 2. Single HTML file Example
+
+Here is an example of using a custom element in a single .html file.
+
+```html
+<!doctype html>
+<html lang="en">
+  <head>
+    <title>WC Base Test</title>
+    <script type="module">
+      import { WebComponent } from 'https://unpkg.com/web-component-base@latest/index.js'
+
+      class HelloWorld extends WebComponent {
+        static props = {
+          myName: 'World',
+        }
+        get template() {
+          return `<h1>Hello ${this.props.myName}!</h1>`
+        }
+      }
+
+      customElements.define('hello-world', HelloWorld)
+    </script>
+  </head>
+  <body>
+    <hello-world my-name="Ayo"></hello-world>
+    <script>
+      const helloWorld = document.querySelector('hello-world')
+      setTimeout(() => {
+        helloWorld.props.myName = 'Ayo zzzZzzz'
+      }, 2500)
+    </script>
+  </body>
+</html>
+```
+
+### 3. Feature Demos
+
+Some feature-specific demos:
+
+1. [Context-Aware Post-Apocalyptic Human](https://codepen.io/ayoayco-the-styleful/pen/WNqJMNG?editors=1010)
+1. [Simple reactive property](https://codepen.io/ayoayco-the-styleful/pen/ZEwoNOz?editors=1010)
+1. [Counter & Toggle](https://codepen.io/ayoayco-the-styleful/pen/PoVegBK?editors=1010)
+1. [Using custom templating (lit-html)](https://codepen.io/ayoayco-the-styleful/pen/ZEwNJBR?editors=1010)
+1. [Using dynamic style objects](https://codepen.io/ayoayco-the-styleful/pen/bGzXjwQ?editors=1010)
+1. [Using the Shadow DOM](https://codepen.io/ayoayco-the-styleful/pen/VwRYVPv?editors=1010)
+1. [Using tagged templates in your vanilla custom element](https://codepen.io/ayoayco-the-styleful/pen/bGzJQJg?editors=1010)

docs/src/content/docs/guides/exports.md

@@ -0,0 +1,42 @@
+---
+title: Exports
+slug: exports
+---
+
+You can import everything separately, or in a single file each for the main exports and utilities.
+
+### Main Exports
+
+```js
+// all in a single file
+
+import { WebComponent, html } from 'web-component-base'
+
+// in separate files
+
+import { WebComponent } from 'web-component-base/WebComponent.js'
+
+import { html } from 'web-component-base/html.js'
+```
+
+### Utilities
+
+```js
+// in a single file
+
+import {
+  serialize,
+  deserialize,
+  getCamelCase,
+  getKebabCase,
+  createElement,
+} from 'web-component-base/utils'
+
+// or separate files
+
+import { serialize } from 'web-component-base/utils/serialize.js'
+
+import { createElement } from 'web-component-base/utils/create-element.js'
+
+// etc...
+```

docs/src/content/docs/guides/getting-started.mdx

@@ -0,0 +1,49 @@
+---
+title: Getting Started
+slug: getting-started
+---
+
+import { Aside, Badge } from '@astrojs/starlight/components';
+
+**Web Component Base (WCB)** 
+<Badge text="alpha" variant="danger" /> is a zero-dependency, tiny JS base class for creating reactive [custom elements](https://developer.mozilla.org/en-US/docs/Web/API/Web_Components/Using_custom_elements) easily.
+
+When you extend the WebComponent class for your custom element, you only have to define the template and properties. Any change in an observed property's value will automatically cause the component UI to render.
+
+The result is a reactive UI on property changes.
+
+Note that there's a trade off between productivity & lightweight-ness here, and the project aims to help in writing custom elements in the same way more mature and better maintained projects already do. Please look into popular options such as [Microsoft's FASTElement](https://fast.design/) & [Google's LitElement](https://lit.dev/) as well.
+
+## Project Status
+
+Treat it as a **stable alpha** product. Though the public APIs are stable, most examples are only useful for simple atomic use-cases due to remaining work needed on the internals.
+
+<Aside type="caution" title="Important">
+For building advanced interactions, there is an in-progress work on smart diffing to prevent component children being wiped on interaction.
+</Aside>
+
+<Aside type="tip">
+If you have some complex needs, we recommend using the `WebComponent` base class with a more mature rendering approach like `lit-html`, and here's a demo for that: [View on CodePen](https://codepen.io/ayoayco-the-styleful/pen/ZEwNJBR?editors=1010).
+</Aside>
+
+## Installation
+
+The library is distributed as complete ECMAScript Modules (ESM) and published on [NPM](https://ayco.io/n/web-component-base). Please open a [GitHub issue](https://github.com/ayoayco/wcb/issues/new) or [discussion](https://github.com/ayoayco/wcb/discussions) for problems or requests regarding our distribution. You can also submit a ticket in [SourceHut](https://todo.sr.ht/~ayoayco/wcb).
+
+### Import via CDN
+
+It is possible to import directly using a CDN like [esm.sh](https://esm.sh/web-component-base) or [unpkg](https://unpkg.com/web-component-base) in your vanilla JS component or HTML files. In all examples in this document, we use `unpkg` but you can find on CodePen examples that `esm.sh` also works well.
+
+Additionally, we use `@latest` in the rest of our [usage](/usage) and [examples](/examples) here for simplicity, but take note that this incurs additional resolution steps for CDNs to find the actual latest published version. You may replace the `@latest` in the URL with specific versions as shown in our CodePen examples, and this will typically be better for performance.
+
+```js
+import { WebComponent } from 'https://unpkg.com/web-component-base@latest/index.js'
+```
+
+### Installation via npm
+
+Usable for projects with bundlers or using import maps pointing to the specific files downloaded in `node_modules/web-component-base`.
+
+```bash
+npm i web-component-base
+```

docs/src/content/docs/guides/just-parts.md

@@ -0,0 +1,24 @@
+---
+title: Using Just Some Parts
+slug: 'just-parts'
+---
+
+You don't have to extend the whole base class to use some features. All internals are exposed and usable separately so you can practically build the behavior on your own classes.
+
+Here's an example of using the `html` tag template on a class that extends from vanilla `HTMLElement`... also [View on CodePen ↗](https://codepen.io/ayoayco-the-styleful/pen/bGzJQJg?editors=1010).
+
+```js
+import { html } from 'https://unpkg.com/web-component-base/html'
+import { createElement } from 'https://unpkg.com/web-component-base/utils'
+
+class MyQuote extends HTMLElement {
+  connectedCallback() {
+    const el = createElement(
+      html` <button onClick=${() => alert('hey')}>hey</button>`
+    )
+    this.appendChild(el)
+  }
+}
+
+customElements.define('my-quote', MyQuote)
+```

docs/src/content/docs/guides/library-size.md

@@ -0,0 +1,8 @@
+---
+title: Library Size
+slug: library-size
+---
+
+All the functions and the base class in the library are minimalist by design and only contains what is needed for their purpose.
+
+The main export (with `WebComponent` + `html`) is **1.7 kB** (min + gzip) according to [bundlephobia.com](https://bundlephobia.com/package/web-component-base@latest), and the `WebComponent` base class is **1.08 kB** (min + brotli) according to [size-limit](http://github.com/ai/size-limit).

docs/src/content/docs/guides/life-cycle-hooks.md

@@ -0,0 +1,92 @@
+---
+title: Life-Cycle Hooks
+slug: life-cycle-hooks
+---
+
+Define behavior when certain events in the component's life cycle is triggered by providing hook methods
+
+### onInit()
+
+- Triggered when the component is connected to the DOM
+- Best for setting up the component
+
+```js
+import { WebComponent } from 'https://unpkg.com/web-component-base@latest/index.js'
+
+class ClickableText extends WebComponent {
+  // gets called when the component is used in an HTML document
+  onInit() {
+    this.onclick = () => console.log('>>> click!')
+  }
+
+  get template() {
+    return `<span style="cursor:pointer">Click me!</span>`
+  }
+}
+```
+
+### afterViewInit()
+
+- Triggered after the view is first initialized
+
+```js
+class ClickableText extends WebComponent {
+  // gets called when the component's innerHTML is first filled
+  afterViewInit() {
+    const footer = this.querySelector('footer')
+    // do stuff to footer after view is initialized
+  }
+
+  get template() {
+    return `<footer>Awesome site &copy; 2023</footer>`
+  }
+}
+```
+
+### onDestroy()
+
+- Triggered when the component is disconnected from the DOM
+- best for undoing any setup done in `onInit()`
+
+```js
+import { WebComponent } from 'https://unpkg.com/web-component-base@latest/index.js'
+
+class ClickableText extends WebComponent {
+  clickCallback() {
+    console.log('>>> click!')
+  }
+
+  onInit() {
+    this.onclick = this.clickCallback
+  }
+
+  onDestroy() {
+    console.log('>>> removing event listener')
+    this.removeEventListener('click', this.clickCallback)
+  }
+
+  get template() {
+    return `<span style="cursor:pointer">Click me!</span>`
+  }
+}
+```
+
+### onChanges()
+
+- Triggered when an attribute value changed
+
+```js
+import { WebComponent } from 'https://unpkg.com/web-component-base@latest/index.js'
+
+class ClickableText extends WebComponent {
+  // gets called when an attribute value changes
+  onChanges(changes) {
+    const { property, previousValue, currentValue } = changes
+    console.log('>>> ', { property, previousValue, currentValue })
+  }
+
+  get template() {
+    return `<span style="cursor:pointer">Click me!</span>`
+  }
+}
+```

docs/src/content/docs/guides/prop-access.mdx

@@ -0,0 +1,48 @@
+---
+title: Prop Access
+slug: prop-access
+---
+
+import { Aside } from '@astrojs/starlight/components'
+
+The `props` property of the `WebComponent` interface is provided for easy read/write access to a camelCase counterpart of _any_ observed attribute.
+
+```js
+class HelloWorld extends WebComponent {
+  static props = {
+    myProp: 'World',
+  }
+  get template() {
+    return html` <h1>Hello ${this.props.myProp}</h1> `
+  }
+}
+```
+
+Assigning a value to the `props.camelCase` counterpart of an observed attribute will trigger an "attribute change" hook.
+
+For example, assigning a value like so:
+
+```
+this.props.myName = 'hello'
+```
+
+...is like calling the following:
+
+```
+this.setAttribute('my-name','hello');
+```
+
+Therefore, this will tell the browser that the UI needs a render if the attribute is one of the component's observed attributes we explicitly provided with `static props`;
+
+<Aside type="note">
+The `props` property of `WebComponent` works like `HTMLElement.dataset`, except `dataset` is only for attributes prefixed with `data-`. A camelCase counterpart using `props` will give read/write access to any attribute, with or without the `data-` prefix.
+
+Another advantage over `HTMLElement.dataset` is that `WebComponent.props` can hold primitive types 'number', 'boolean', 'object' and 'string'.
+</Aside>
+
+### Alternatives
+
+The current alternatives are using what `HTMLElement` provides out-of-the-box, which are:
+
+1. `HTMLElement.dataset` for attributes prefixed with `data-*`. Read more about this [on MDN](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/dataset).
+1. Methods for reading/writing attribute values: `setAttribute(...)` and `getAttribute(...)`; note that managing the attribute names as strings can be difficult as the code grows.

docs/src/content/docs/guides/shadow-dom.md

@@ -0,0 +1,28 @@
+---
+title: Using the Shadow DOM
+slug: shadow-dom
+---
+
+Add a static property `shadowRootInit` with object value of type `ShadowRootInit` (see [options on MDN](https://developer.mozilla.org/en-US/docs/Web/API/Element/attachShadow#options)) to opt-in to using shadow dom for the whole component.
+
+Try it now [on CodePen ↗](https://codepen.io/ayoayco-the-styleful/pen/VwRYVPv?editors=1010)
+
+Example:
+
+```js
+class ShadowElement extends WebComponent {
+  static shadowRootInit = {
+    mode: 'open', // can be 'open' or 'closed'
+  }
+
+  get template() {
+    return html`
+      <div>
+        <p>Wow!?</p>
+      </div>
+    `
+  }
+}
+
+customElements.define('shadow-element', ShadowElement)
+```

docs/src/content/docs/guides/styling.md

@@ -0,0 +1,90 @@
+---
+title: Styling
+slug: styling
+---
+
+There are two ways we can safely have scoped styles:
+
+1. Using style objects
+2. Using the Shadow DOM and constructable stylesheets
+
+It is highly recommended to use the second approach, as with it, browsers can assist more for performance.
+
+## Using style objects
+
+When using the built-in `html` function for tagged templates, a style object of type `Partial<CSSStyleDeclaration>` can be passed to any element's `style` attribute. This allows for calculated and conditional styles. Read more on style objects [on MDN](https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleDeclaration).
+
+Try it now with this [example on CodePen ↗](https://codepen.io/ayoayco-the-styleful/pen/bGzXjwQ?editors=1010)
+
+```js
+import { WebComponent } from 'https://unpkg.com/web-component-base@latest/index.js'
+
+class StyledElement extends WebComponent {
+  static props = {
+    emphasize: false,
+    type: 'warn',
+  }
+
+  #typeStyles = {
+    warn: {
+      backgroundColor: 'yellow',
+      border: '1px solid orange',
+    },
+    error: {
+      backgroundColor: 'orange',
+      border: '1px solid red',
+    },
+  }
+
+  get template() {
+    return html`
+      <div
+        style=${{
+          ...this.#typeStyles[this.props.type],
+          padding: '1em',
+        }}
+      >
+        <p style=${{ fontStyle: this.props.emphasize && 'italic' }}>Wow!</p>
+      </div>
+    `
+  }
+}
+
+customElements.define('styled-elements', StyledElement)
+```
+
+## Using the Shadow DOM and Constructable Stylesheets
+
+If you [use the Shadow DOM](/shadow-dom), you can add a `static styles` property of type string which will be added in the `shadowRoot`'s [`adoptedStylesheets`](https://developer.mozilla.org/en-US/docs/Web/API/Document/adoptedStyleSheets).
+
+Try it now with this [example on CodePen ↗](https://codepen.io/ayoayco-the-styleful/pen/JojmeEe?editors=1010)
+
+```js
+class StyledElement extends WebComponent {
+  static shadowRootInit = {
+    mode: 'open',
+  }
+
+  static styles = `
+    div {
+      background-color: yellow;
+      border: 1px solid black;
+      padding: 1em;
+
+      p {
+        text-decoration: underline;
+      }
+    }
+  `
+
+  get template() {
+    return html`
+      <div>
+        <p>Wow!?</p>
+      </div>
+    `
+  }
+}
+
+customElements.define('styled-elements', StyledElement)
+```

docs/src/content/docs/guides/template-vs-render.md

@@ -0,0 +1,12 @@
+---
+title: template vs render()
+slug: template-vs-render
+---
+
+This mental model attempts to reduce the cognitive complexity of authoring components:
+
+1. The `template` is a read-only property (initialized with a `get` keyword) that represents _how_ the component view is rendered.
+1. There is a `render()` method that triggers a view render.
+1. This `render()` method is _automatically_ called under the hood every time an attribute value changed.
+1. You can _optionally_ call this `render()` method at any point to trigger a render if you need (eg, if you have private unobserved properties that need to manually trigger a render)
+1. Overriding the `render()` function for handling a custom `template` is also possible. Here's an example of using `lit-html`: [View on CodePen ↗](https://codepen.io/ayoayco-the-styleful/pen/ZEwNJBR?editors=1010)

docs/src/content/docs/guides/usage.md

@@ -0,0 +1,43 @@
+---
+title: Usage
+slug: usage
+---
+
+In your component class:
+
+```js
+// HelloWorld.mjs
+import { WebComponent } from 'https://unpkg.com/web-component-base@latest/index.js'
+
+class HelloWorld extends WebComponent {
+  static props = {
+    myName: 'World',
+    emotion: 'sad',
+  }
+  get template() {
+    return `
+      <h1>Hello ${this.props.myName}${this.props.emotion === 'sad' ? '. 😭' : '! 🙌'}</h1>
+    `
+  }
+}
+
+customElements.define('hello-world', HelloWorld)
+```
+
+In your HTML page:
+
+```html
+<head>
+  <script type="module" src="HelloWorld.mjs"></script>
+</head>
+<body>
+  <hello-world my-name="Ayo" emotion="sad">
+  <script>
+      const helloWorld = document.querySelector('hello-world');
+
+      setTimeout(() => {
+        helloWorld.setAttribute('emotion', 'excited');
+      }, 2500)
+  </script>
+</body>
+```

docs/src/content/docs/guides/why.mdx

@@ -0,0 +1,23 @@
+---
+title: Why use this base class?
+slug: 'why'
+---
+
+import { Aside, Badge } from '@astrojs/starlight/components';
+
+Often times, when simple websites need a quick custom element, the simplest way is to create one extending from `HTMLElement`. However, it can quickly reach a point where writing the code from scratch can seem confusing and hard to maintain especially when compared to other projects with more advanced setups.
+
+Also, when coming from frameworks with an easy declarative coding experience (using templates), the default imperative way (e.g., creating instances of elements, manually attaching event handlers, and other DOM manipulations) is a frequent pain point we see.
+
+By taking out bigger concerns that [a metaframework](https://github.com/ayoayco/mcfly) should handle, this project aims to focus on keeping the component-level matters simple and lightweight. This allows for addressing the said problems with virtually zero tooling required and thin abstractions from vanilla custom element APIs – giving you only the bare minimum code to be productive.
+
+It works on current-day browsers without needing compilers, transpilers, or polyfills.
+
+<Aside type="tip">
+Have questions or suggestions? There are many ways to get in touch:
+
+1. Open a [GitHub issue](https://github.com/ayoayco/wcb/issues/new) or [discussion](https://github.com/ayoayco/wcb/discussions)
+1. Submit a ticket via [SourceHut todo](https://todo.sr.ht/~ayoayco/wcb)
+1. Email me: [ayo@ayco.io](mailto:ayo@ayco.io)
+1. Chat on Discord: [Ayo's Projects](https://discord.gg/kkvW7GYNAp)
+</Aside>

docs/src/content/docs/index.mdx

@@ -0,0 +1,35 @@
+---
+title: Web Component Base
+description: Web components in Easy Mode
+template: splash
+hero:
+  tagline: The ultra-minimal base class for your custom HTML elements
+  # image:
+  #   file: ../../assets/houston.webp
+  actions:
+    - text: Get Started
+      link: /getting-started
+      icon: right-arrow
+    - text: Try on CodePen
+      link: https://codepen.io/ayoayco-the-styleful/pen/PoVegBK?editors=1010
+      icon: external
+      variant: minimal
+---
+
+import { Card, CardGrid } from '@astrojs/starlight/components';
+
+<CardGrid stagger>
+	<Card title="Clean." icon="star">
+		Skip repetitive things when writing custom elements
+	</Card>
+	<Card title="Tiny." icon="add-document">
+		Only the bare minimum code to boost productivity
+	</Card>
+	<Card title="Easy." icon="heart">
+		Sensible life-cycle hooks that you understand and remember
+	</Card>
+	<Card title="Familiar." icon="open-book">
+		Declarative templates for DOM manipulation & event handlers
+	</Card>
+</CardGrid>
+

docs/src/content/docs/reference/example.md

@@ -0,0 +1,11 @@
+---
+title: Example Reference
+description: A reference page in my new Starlight docs site.
+---
+
+Reference pages are ideal for outlining how things work in terse and clear terms.
+Less concerned with telling a story or addressing a specific use case, they should give a comprehensive outline of what you're documenting.
+
+## Further reading
+
+- Read [about reference](https://diataxis.fr/reference/) in the Diátaxis framework

docs/tsconfig.json

@@ -0,0 +1,5 @@
+{
+  "extends": "astro/tsconfigs/strict",
+  "include": [".astro/types.d.ts", "**/*"],
+  "exclude": ["dist"]
+}

eslint.config.mjs

@@ -0,0 +1,18 @@
+import globals from 'globals'
+import pluginJs from '@eslint/js'
+import jsdoc from 'eslint-plugin-jsdoc'
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+  { languageOptions: { globals: globals.browser } },
+  pluginJs.configs.recommended,
+  jsdoc.configs['flat/recommended'],
+  {
+    rules: {
+      'no-unused-vars': 'warn',
+    },
+  },
+  {
+    ignores: ['site/*', 'dist/*'],
+  },
+]

examples/constructed-styles/index.html

@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>WC demo</title>
+    <script type="module" src="./index.js"></script>
+  </head>
+  <body>
+    <styled-elements type="warn" condition></styled-elements>
+  </body>
+</html>

examples/constructed-styles/index.js

@@ -0,0 +1,30 @@
+// @ts-check
+import { WebComponent, html } from '../../src/index.js'
+
+class StyledElements extends WebComponent {
+  static shadowRootInit = {
+    mode: 'open',
+  }
+
+  static styles = `
+    div {
+      background-color: yellow;
+      border: 1px solid black;
+      padding: 1em;
+
+      p {
+        text-decoration: underline;
+      }
+    }
+  `
+
+  get template() {
+    return html`
+      <div>
+        <p>Wow!?</p>
+      </div>
+    `
+  }
+}
+
+customElements.define('styled-elements', StyledElements)

examples/demo/BooleanPropTest.mjs

@@ -0,0 +1,17 @@
+import { html, WebComponent } from '../../src/index.js'
+
+export class BooleanPropTest extends WebComponent {
+  static props = {
+    isInline: false,
+    anotherone: false,
+  }
+
+  get template() {
+    return html`
+      <p>is-inline: ${this.props.isInline}</p>
+      <p>another-one: ${this.props.anotherone}</p>
+    `
+  }
+}
+
+customElements.define('boolean-prop-test', BooleanPropTest)

examples/demo/Counter.mjs

@@ -0,0 +1,17 @@
+// @ts-check
+import { WebComponent, html } from '../../src/index.js'
+
+export class Counter extends WebComponent {
+  static props = {
+    count: 0,
+  }
+  get template() {
+    return html`
+      <button onClick=${() => ++this.props.count} id="btn">
+        ${this.props.count}
+      </button>
+    `
+  }
+}
+
+customElements.define('my-counter', Counter)

examples/demo/HelloWorld.mjs

@@ -0,0 +1,26 @@
+// @ts-check
+import { html, WebComponent } from '../../src/index.js'
+
+export class HelloWorld extends WebComponent {
+  static props = {
+    count: 0,
+    emotion: 'sad',
+  }
+
+  onInit() {
+    this.props.count = 0
+  }
+
+  get template() {
+    const label = this.props.count ? `Clicked ${this.props.count}` : 'World'
+    const emote = this.props.emotion === 'sad' ? '. 😭' : '! 🙌'
+
+    return html`
+      <button onclick=${() => ++this.props.count}>
+        Hello ${label}${emote}
+      </button>
+    `
+  }
+}
+
+customElements.define('hello-world', HelloWorld)

examples/demo/SimpleText.mjs

@@ -0,0 +1,21 @@
+// @ts-check
+import { html, WebComponent } from '../../src/index.js'
+
+class SimpleText extends WebComponent {
+  clickCallback() {
+    console.log('>>> click!')
+  }
+
+  onDestroy() {
+    console.log('>>> removing event listener')
+    this.removeEventListener('click', this.clickCallback)
+  }
+
+  get template() {
+    return html`<span onclick=${this.clickCallback} style="cursor:pointer"
+      >Click me!</span
+    >`
+  }
+}
+
+customElements.define('simple-text', SimpleText)

examples/demo/Toggle.js

@@ -0,0 +1,16 @@
+import { WebComponent, html } from '../../src/index.js'
+
+class Toggle extends WebComponent {
+  static props = {
+    toggle: false,
+  }
+  get template() {
+    return html`
+      <button onClick=${() => (this.props.toggle = !this.props.toggle)}>
+        ${this.props.toggle}
+      </button>
+    `
+  }
+}
+
+customElements.define('my-toggle', Toggle)

examples/demo/index.html

@@ -0,0 +1,33 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>WC demo</title>
+    <script type="module" src="./HelloWorld.mjs"></script>
+    <script type="module" src="./SimpleText.mjs"></script>
+    <script type="module" src="./BooleanPropTest.mjs"></script>
+    <script type="module" src="./Counter.mjs"></script>
+    <script type="module" src="./Toggle.js"></script>
+  </head>
+  <body>
+    <my-toggle></my-toggle>
+    <my-toggle toggle></my-toggle>
+    <hr />
+    <hello-world emotion="sad"></hello-world>
+    <my-counter></my-counter>
+    <p>
+      <simple-text></simple-text>
+    </p>
+    <p>
+      <boolean-prop-test is-inline anotherOne></boolean-prop-test>
+    </p>
+
+    <script type="module">
+      const helloWorld = document.querySelector('hello-world')
+      setTimeout(() => {
+        helloWorld.props.emotion = 'excited'
+      }, 2500)
+    </script>
+  </body>
+</html>

examples/pens/counter-toggle.html

@@ -0,0 +1,57 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>WC demo</title>
+    <style>
+      * {
+        font-size: larger;
+      }
+    </style>
+    <script type="module">
+      import {
+        WebComponent,
+        html,
+      } from 'https://esm.sh/web-component-base@latest'
+
+      export class Counter extends WebComponent {
+        static props = {
+          count: 0,
+        }
+        get template() {
+          return html`<button onClick=${() => ++this.props.count}>
+            ${this.props.count}
+          </button>`
+        }
+      }
+
+      class Toggle extends WebComponent {
+        static props = {
+          toggle: false,
+        }
+
+        clickFn = () => (this.props.toggle = !this.props.toggle)
+
+        get template() {
+          return html`<button onclick=${this.clickFn}>
+            ${this.props.toggle ? 'On' : 'Off'}
+          </button>`
+        }
+      }
+
+      customElements.define('my-counter', Counter)
+      customElements.define('my-toggle', Toggle)
+    </script>
+  </head>
+  <body>
+    <div>
+      Counter:
+      <my-counter />
+    </div>
+    <div>
+      Toggle:
+      <my-toggle />
+    </div>
+  </body>
+</html>

examples/props-blueprint/hello-world.js

@@ -0,0 +1,12 @@
+import { html, WebComponent } from '../../src/index.js'
+
+export class HelloWorld extends WebComponent {
+  static props = {
+    myName: 'World',
+  }
+  get template() {
+    return html`<p>Hello ${this.props.myName}</p>`
+  }
+}
+
+customElements.define('hello-world', HelloWorld)

examples/props-blueprint/index.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>WC demo</title>
+    <script type="module" src="./index.js"></script>
+    <script type="module" src="./hello-world.js"></script>
+  </head>
+  <body>
+    <my-counter></my-counter>
+    <hello-world></hello-world>
+  </body>
+</html>

examples/props-blueprint/index.js

@@ -0,0 +1,14 @@
+import { html, WebComponent } from '../../src/index.js'
+
+export class Counter extends WebComponent {
+  static props = {
+    count: 123,
+  }
+  get template() {
+    return html`<button onclick=${() => ++this.props.count} id="btn">
+      ${this.props.count}
+    </button>`
+  }
+}
+
+customElements.define('my-counter', Counter)

examples/style-objects/index.html

@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>WC demo</title>
+    <script type="module" src="./index.js"></script>
+  </head>
+  <body>
+    <styled-elements type="warn" condition></styled-elements>
+  </body>
+</html>

examples/style-objects/index.js

@@ -0,0 +1,39 @@
+// @ts-check
+import { WebComponent, html } from '../../src/index.js'
+
+class StyledElements extends WebComponent {
+  static props = {
+    condition: false,
+    type: 'info',
+  }
+
+  #typeStyles = {
+    info: {
+      backgroundColor: 'blue',
+      border: '1px solid green',
+    },
+    warn: {
+      backgroundColor: 'yellow',
+      border: '1px solid orange',
+    },
+    error: {
+      backgroundColor: 'orange',
+      border: '1px solid red',
+    },
+  }
+
+  get template() {
+    return html`
+      <div
+        style=${{
+          ...this.#typeStyles[this.props.type],
+          padding: '1em',
+        }}
+      >
+        <p style=${{ fontStyle: this.props.condition && 'italic' }}>Wow!</p>
+      </div>
+    `
+  }
+}
+
+customElements.define('styled-elements', StyledElements)

examples/templating/index.html

@@ -0,0 +1,17 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>WC demo</title>
+    <script type="module" src="./index.js"></script>
+    <script type="module" src="./with-lit.js"></script>
+  </head>
+  <body>
+    <h2>With our html</h2>
+    <my-counter></my-counter>
+    <hr />
+    <h2>With lit-html</h2>
+    <lit-counter></lit-counter>
+  </body>
+</html>

examples/templating/index.js

@@ -0,0 +1,49 @@
+// @ts-check
+import { WebComponent, html } from '../../src/index.js'
+
+export class Counter extends WebComponent {
+  static props = {
+    count: 123,
+  }
+  get template() {
+    const list = ['a', 'b', 'c', 'what']
+    const links = [
+      {
+        url: 'https://ayco.io',
+        text: 'Ayo Ayco',
+      },
+      {
+        url: 'https://ayco.io/gh/McFly',
+        text: 'McFly',
+      },
+    ]
+
+    return html`
+      <button
+        class="hey"
+        id="btn"
+        onClick=${() => ++this.props.count}
+        style="background-color: green; color: white;"
+        about="Elephant"
+        data-name="thing"
+        aria-name="thingz"
+      >
+        <span>${this.props.count}</span>
+      </button>
+      <form style="margin: 1em 0;">
+        <label data-my-name="Ayo" for="the-input">Name</label>
+        <input id="the-input" type="foo" value="Name:" />
+      </form>
+      ${list.map((item) => html`<p>${item}</p>`)}
+      <h3 about="Elephant">Links</h3>
+      <ul>
+        ${links.map(
+          (link) =>
+            html`<li><a href=${link.url} target="_blank">${link.text}</a></li>`
+        )}
+      </ul>
+    `
+  }
+}
+
+customElements.define('my-counter', Counter)

examples/templating/with-lit.js

@@ -0,0 +1,55 @@
+import { WebComponent } from '../../src/index.js'
+import {
+  html,
+  render as lit,
+} from 'https://unpkg.com/lit-html@3.1.0/lit-html.js'
+
+export class LitCounter extends WebComponent {
+  static props = {
+    count: 123,
+  }
+  get template() {
+    const list = ['a', 'b', 'c', 'what']
+    const links = [
+      {
+        url: 'https://ayco.io',
+        text: 'Ayo Ayco',
+      },
+      {
+        url: 'https://ayco.io/gh/McFly',
+        text: 'McFly',
+      },
+    ]
+
+    return html`
+      <button
+        class="hey"
+        id="btn"
+        @click=${() => ++this.props.count}
+        style="background-color: green; color: white;"
+        about="Elephant"
+        data-name="thing"
+        aria-name="thingz"
+      >
+        <span>${this.props.count}</span>
+      </button>
+      <form style="margin: 1em 0;">
+        <label data-my-name="Ayo" for="the-input">Name</label>
+        <input id="the-input" type="foo" value="Name:" />
+      </form>
+      ${list.map((item) => html`<p>${item}</p>`)}
+      <h3 about="Elephant">Links</h3>
+      <ul>
+        ${links.map(
+          (link) =>
+            html`<li><a href=${link.url} target="_blank">${link.text}</a></li>`
+        )}
+      </ul>
+    `
+  }
+  render() {
+    lit(this.template, this)
+  }
+}
+
+customElements.define('lit-counter', LitCounter)

examples/type-restore/Counter.mjs

@@ -0,0 +1,15 @@
+// @ts-check
+import { html, WebComponent } from '../../src/index.js'
+
+export class Counter extends WebComponent {
+  static props = {
+    count: 1,
+  }
+  get template() {
+    return html`<button onclick=${() => ++this.props.count}>
+      ${this.props.count}
+    </button>`
+  }
+}
+
+customElements.define('my-counter', Counter)

examples/type-restore/HelloWorld.mjs

@@ -0,0 +1,14 @@
+import { html, WebComponent } from '../../src/index.js'
+
+export class HelloWorld extends WebComponent {
+  static props = {
+    name: 'a',
+  }
+  addA = () => (this.props.name += 'a')
+
+  get template() {
+    return html`<button onclick=${this.addA}>W${this.props.name}h!</button>`
+  }
+}
+
+customElements.define('my-hello-world', HelloWorld)

examples/type-restore/Object.mjs

@@ -0,0 +1,48 @@
+import { html, WebComponent } from '../../src/index.js'
+
+/**
+ * TODO: rendering currently wipes all children so focus gets removed on fields
+ */
+export class ObjectText extends WebComponent {
+  static props = {
+    object: {
+      hello: 'worldzz',
+      age: 2,
+    },
+  }
+  onChanges() {
+    console.log('>>> object', this.props.object)
+  }
+  get template() {
+    return html`
+      <form>
+        <label for="greeting-field">Hello</label>
+        <textarea
+          onkeyup=${(event) => {
+            this.props.object = {
+              ...this.props.object,
+              hello: event.target.value,
+            }
+          }}
+          id="greeting-field"
+        >
+            ${this.props.object.hello}
+        </textarea
+        >
+        <label for="age-field">Age</label>
+        <input
+          onkeyup=${(event) => {
+            this.props.object = {
+              ...this.props.object,
+              age: event.target.value,
+            }
+          }}
+          id="age-field"
+          value=${this.props.object.age}
+        />
+      </form>
+    `
+  }
+}
+
+customElements.define('my-object', ObjectText)

examples/type-restore/Toggle.mjs

@@ -0,0 +1,20 @@
+// @ts-check
+import { html, WebComponent } from '../../src/index.js'
+
+export class Toggle extends WebComponent {
+  static props = {
+    toggle: false,
+  }
+  handleToggle() {
+    this.props.toggle = !this.props.toggle
+  }
+  get template() {
+    return html`
+      <button onclick=${() => this.handleToggle()} id="toggle">
+        ${this.props.toggle ? 'On' : 'Off'}
+      </button>
+    `
+  }
+}
+
+customElements.define('my-toggle', Toggle)

examples/type-restore/index.html

@@ -0,0 +1,44 @@
+<!doctype html>
+<html lang="en">
+
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>WC demo</title>
+  <script type="module" src="./Counter.mjs"></script>
+  <script type="module" src="./Toggle.mjs"></script>
+  <script type="module" src="./HelloWorld.mjs"></script>
+  <script type="module" src="./Object.mjs"></script>
+  <style>
+    * {
+      font-size: larger;
+    }
+  </style>
+</head>
+
+<body>
+  <div>Counter: <my-counter></my-counter></div>
+  <div>Toggle: <my-toggle></my-toggle></div>
+  <div>String: <my-hello-world></my-hello-world></div>
+  <div>
+    <my-object></my-object>
+    <p id="display-panel"></p>
+  </div>
+  <script type="module">
+    /**
+     * TODO: fix using custom events
+     */
+
+    // import { attachEffect } from '../../src/index.js'
+    // const myObjectEl = document.querySelector('my-object')
+    // const objectProp = myObjectEl.props.object
+    // const displayPanelEl = document.querySelector('#display-panel')
+    // displayPanelEl.textContent = JSON.stringify(objectProp)
+    // attachEffect(objectProp, (object) => {
+    //   displayPanelEl.textContent = JSON.stringify(object)
+    // })
+    // console.log(JSON.stringify(object))
+  </script>
+</body>
+
+</html>

examples/use-shadow/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>WC demo</title>
+    <script type="module" src="./index.js"></script>
+  </head>
+  <body>
+    <h2>With our html</h2>
+    <my-counter></my-counter>
+  </body>
+</html>

examples/use-shadow/index.js

@@ -0,0 +1,55 @@
+// @ts-check
+import { WebComponent, html } from '../../src/index.js'
+
+export class Counter extends WebComponent {
+  static props = {
+    count: 123,
+  }
+  static shadowRootInit = {
+    mode: 'open',
+  }
+
+  get template() {
+    const list = ['a', 'b', 'c', 'what']
+    const links = [
+      {
+        url: 'https://ayco.io',
+        text: 'Ayo Ayco',
+      },
+      {
+        url: 'https://ayco.io/gh/McFly',
+        text: 'McFly',
+      },
+    ]
+
+    return html`
+      <button
+        class="hey"
+        id="btn"
+        onClick=${() => ++this.props.count}
+        style=${{ backgroundColor: 'green', color: 'white' }}
+        about="Elephant"
+        data-name="thing"
+        aria-name="thingz"
+      >
+        <span>${this.props.count}</span>
+      </button>
+      <form style="margin: 1em 0;">
+        <label data-my-name="Ayo" for="the-input">Name</label>
+        <input id="the-input" type="foo" value="Name:" />
+      </form>
+      ${list.map((item) => html`<p>${item}</p>`)}
+      <h3 about="Elephant">Links</h3>
+      <ul>
+        ${links.map(
+          (link) =>
+            html`<li>
+              <a href=${link.url} target="_blank">${link.text}</a>
+            </li>`
+        )}
+      </ul>
+    `
+  }
+}
+
+customElements.define('my-counter', Counter)

index.mjs

@@ -1,3 +0,0 @@
-import { WebComponent } from './WebComponent.mjs';
-
-export default WebComponent;

netlify.toml

@@ -0,0 +1,3 @@
+[build]
+base = "docs"
+publish = "dist"

package.json

@@ -1,19 +1,51 @@
 {
   "name": "web-component-base",
-  "version": "1.2.2",
+  "version": "4.1.1",
-  "description": "JavaScript Web Component base class",
+  "description": "A zero-dependency & tiny JS base class for creating reactive custom elements easily",
-  "main": "index.mjs",
+  "type": "module",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    },
+    "./*": {
+      "types": "./dist/*.d.ts",
+      "import": "./dist/*.js"
+    },
+    "./utils": {
+      "types": "./dist/utils/index.d.ts",
+      "import": "./dist/utils/index.js"
+    },
+    "./utils/*": {
+      "types": "./dist/utils/*.d.ts",
+      "import": "./dist/utils/*.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "preinstall": "npx only-allow pnpm",
+    "start": "npx simple-server .",
+    "dev": "npm start",
+    "test": "vitest --run",
+    "test:watch": "vitest",
+    "demo": "npx simple-server .",
+    "docs": "pnpm -F docs start",
+    "build": "pnpm run clean && tsc && pnpm run copy:source",
+    "size-limit": "pnpm run build && size-limit",
+    "clean": "rm -rf dist",
+    "copy:source": "esbuild --minify --bundle ./src/*.js ./src/utils/* --outdir=\"./dist\" --format=\"esm\"",
+    "pub": "pnpm run clean && pnpm run build && npm publish",
+    "pub:patch": "npm version patch && pnpm run pub",
+    "pub:minor": "npm version minor && pnpm run pub",
+    "pub:major": "npm version major && pnpm run pub",
+    "format": "prettier . --write",
+    "lint": "eslint . --config eslint.config.mjs",
+    "prepare": "husky install"
   },
-  "repository": {
+  "repository": "https://github.com/ayoayco/web-component-base",
-    "type": "git",
+  "homepage": "https://WebComponent.io",
-    "url": "https://git.sr.ht/~ayoayco/web-component-base"
-  },
-  "files": [
-    "index.mjs",
-    "WebComponent.mjs"
-  ],
   "keywords": [
     "web components",
     "web component",
@@ -23,7 +55,54 @@
   "author": "Ayo Ayco",
   "license": "MIT",
   "bugs": {
-    "url": "https://todo.sr.ht/~ayoayco/web-component-base"
+    "url": "https://github.com/ayoayco/web-component-base/issues"
   },
-  "homepage": "https://git.sr.ht/~ayoayco/web-component-base#readme"
+  "devDependencies": {
+    "@eslint/js": "^9.29.0",
+    "@size-limit/preset-small-lib": "^11.2.0",
+    "@vitest/coverage-v8": "3.2.4",
+    "esbuild": "^0.25.5",
+    "eslint": "^9.29.0",
+    "eslint-plugin-jsdoc": "^51.2.3",
+    "globals": "^16.2.0",
+    "happy-dom": "^18.0.1",
+    "husky": "^9.1.7",
+    "netlify-cli": "^22.1.6",
+    "prettier": "^3.6.1",
+    "release-it": "^19.0.3",
+    "simple-server": "^1.1.1",
+    "size-limit": "^11.2.0",
+    "typescript": "^5.8.3",
+    "vitest": "^3.2.4"
+  },
+  "size-limit": [
+    {
+      "path": "./dist/WebComponent.js",
+      "limit": "1.2 KB"
+    },
+    {
+      "path": "./dist/html.js",
+      "limit": "0.6 KB"
+    },
+    {
+      "path": "./dist/utils/create-element.js",
+      "limit": "0.5 KB"
+    },
+    {
+      "path": "./dist/utils/deserialize.js",
+      "limit": "0.5 KB"
+    },
+    {
+      "path": "./dist/utils/serialize.js",
+      "limit": "0.5 KB"
+    },
+    {
+      "path": "./dist/utils/get-camel-case.js",
+      "limit": "0.5 KB"
+    },
+    {
+      "path": "./dist/utils/get-kebab-case.js",
+      "limit": "0.5 KB"
+    }
+  ]
 }

pnpm-workspace.yaml

@@ -0,0 +1,3 @@
+packages:
+  # include packages in subfolders (e.g. apps/ and packages/)
+  - 'docs/'

prettier.config.mjs

@@ -0,0 +1,14 @@
+// prettier.config.js, .prettierrc.js, prettier.config.mjs, or .prettierrc.mjs
+
+/**
+ * @see https://prettier.io/docs/en/configuration.html
+ * @type {import("prettier").Config}
+ */
+const config = {
+  trailingComma: 'es5',
+  tabWidth: 2,
+  semi: false,
+  singleQuote: true,
+}
+
+export default config

src/WebComponent.js

@@ -0,0 +1,223 @@
+/**
+ * @license MIT <https://opensource.org/licenses/MIT>
+ * @author Ayo Ayco <https://ayo.ayco.io>
+ */
+
+import {
+  createElement,
+  getKebabCase,
+  getCamelCase,
+  serialize,
+  deserialize,
+} from './utils/index.js'
+
+/**
+ * A minimal base class to reduce the complexity of creating reactive custom elements
+ * @see https://WebComponent.io
+ */
+export class WebComponent extends HTMLElement {
+  #host
+  #prevDOM
+  #props
+  #typeMap = {}
+
+  /**
+   * Blueprint for the Proxy props
+   * @typedef {{[name: string]: any}} PropStringMap
+   * @type {PropStringMap}
+   */
+  static props
+
+  // TODO: support array of styles
+  static styles
+
+  /**
+   * Read-only string property that represents how the component will be rendered
+   * @returns {string | any}
+   * @see https://www.npmjs.com/package/web-component-base#template-vs-render
+   */
+  get template() {
+    return ''
+  }
+
+  /**
+   * Shadow root initialization options
+   * @type {ShadowRootInit}
+   */
+  static shadowRootInit
+
+  /**
+   * Read-only property containing camelCase counterparts of observed attributes.
+   * @see https://www.npmjs.com/package/web-component-base#prop-access
+   * @see https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/dataset
+   * @type {PropStringMap}
+   */
+  get props() {
+    return this.#props
+  }
+
+  /**
+   * Triggered after view is initialized
+   */
+  afterViewInit() {}
+
+  /**
+   * Triggered when the component is connected to the DOM
+   */
+  onInit() {}
+
+  /**
+   * Triggered when the component is disconnected from the DOM
+   */
+  onDestroy() {}
+
+  /**
+   * Triggered when an attribute value changes
+   * @typedef {{
+   *  property: string,
+   *  previousValue: any,
+   *  currentValue: any
+   * }} Changes
+   * @param {Changes} changes
+   */
+  onChanges(changes) {}
+
+  constructor() {
+    super()
+    this.#initializeProps()
+    this.#initializeHost()
+  }
+
+  static get observedAttributes() {
+    const propKeys = this.props
+      ? Object.keys(this.props).map((camelCase) => getKebabCase(camelCase))
+      : []
+
+    return propKeys
+  }
+
+  connectedCallback() {
+    this.onInit()
+    this.render()
+    this.afterViewInit()
+  }
+
+  disconnectedCallback() {
+    this.onDestroy()
+  }
+
+  attributeChangedCallback(property, previousValue, currentValue) {
+    const camelCaps = getCamelCase(property)
+
+    if (previousValue !== currentValue) {
+      this[property] = currentValue === '' || currentValue
+      this[camelCaps] = this[property]
+
+      this.#handleUpdateProp(camelCaps, this[property])
+
+      this.render()
+      this.onChanges({ property, previousValue, currentValue })
+    }
+  }
+
+  #handleUpdateProp(key, stringifiedValue) {
+    const restored = deserialize(stringifiedValue, this.#typeMap[key])
+    if (restored !== this.props[key]) this.props[key] = restored
+  }
+
+  #handler(setter, meta) {
+    const typeMap = meta.#typeMap
+
+    return {
+      set(obj, prop, value) {
+        const oldValue = obj[prop]
+
+        if (!(prop in typeMap)) {
+          typeMap[prop] = typeof value
+        }
+
+        if (typeMap[prop] !== typeof value) {
+          throw TypeError(
+            `Cannot assign ${typeof value} to ${
+              typeMap[prop]
+            } property (setting '${prop}' of ${meta.constructor.name})`
+          )
+        } else if (oldValue !== value) {
+          obj[prop] = value
+          const kebab = getKebabCase(prop)
+          setter(kebab, serialize(value))
+        }
+
+        return true
+      },
+      get(obj, prop) {
+        return obj[prop]
+      },
+    }
+  }
+
+  #initializeProps() {
+    let initialProps = structuredClone(this.constructor.props) ?? {}
+    Object.keys(initialProps).forEach((camelCase) => {
+      const value = initialProps[camelCase]
+      this.#typeMap[camelCase] = typeof value
+      this.setAttribute(getKebabCase(camelCase), serialize(value))
+    })
+    if (!this.#props) {
+      this.#props = new Proxy(
+        initialProps,
+        this.#handler((key, value) => this.setAttribute(key, value), this)
+      )
+    }
+  }
+  #initializeHost() {
+    this.#host = this
+    if (this.constructor.shadowRootInit) {
+      this.#host = this.attachShadow(this.constructor.shadowRootInit)
+    }
+  }
+
+  render() {
+    if (typeof this.template === 'string') {
+      this.innerHTML = this.template
+    } else if (typeof this.template === 'object') {
+      const tree = this.template
+
+      // TODO: smart diffing
+      if (JSON.stringify(this.#prevDOM) !== JSON.stringify(tree)) {
+        this.#applyStyles()
+
+        /**
+         * create element
+         * - resolve prop values
+         * - attach event listeners
+         */
+        const el = createElement(tree)
+
+        if (el) {
+          if (Array.isArray(el)) this.#host.replaceChildren(...el)
+          else this.#host.replaceChildren(el)
+        }
+        this.#prevDOM = tree
+      }
+    }
+  }
+
+  #applyStyles() {
+    if (this.constructor.styles !== undefined)
+      try {
+        const styleObj = new CSSStyleSheet()
+        styleObj.replaceSync(this.constructor.styles)
+        console.log(this.constructor.styles, this.constructor.props)
+        this.#host.adoptedStyleSheets = [
+          ...this.#host.adoptedStyleSheets,
+          styleObj,
+        ]
+      } catch (e) {
+        console.error(
+          'ERR: Constructable stylesheets are only supported in shadow roots',
+          e
+        )
+      }
+  }
+}

src/html.js

@@ -0,0 +1,81 @@
+const htm =
+  (new Map(),
+  function (n) {
+    for (
+      var e,
+        l,
+        s = arguments,
+        t = 1,
+        u = '',
+        r = '',
+        o = [0],
+        f = function (n) {
+          1 === t && (n || (u = u.replace(/^\s*\n\s*|\s*\n\s*$/g, '')))
+            ? o.push(n ? s[n] : u)
+            : 3 === t && (n || u)
+              ? ((o[1] = n ? s[n] : u), (t = 2))
+              : 2 === t && '...' === u && n
+                ? (o[2] = Object.assign(o[2] || {}, s[n]))
+                : 2 === t && u && !n
+                  ? ((o[2] = o[2] || {})[u] = !0)
+                  : t >= 5 &&
+                    (5 === t
+                      ? (((o[2] = o[2] || {})[l] = n
+                          ? u
+                            ? u + s[n]
+                            : s[n]
+                          : u),
+                        (t = 6))
+                      : (n || u) && (o[2][l] += n ? u + s[n] : u)),
+            (u = '')
+        },
+        i = 0;
+      i < n.length;
+      i++
+    ) {
+      i && (1 === t && f(), f(i))
+      for (var p = 0; p < n[i].length; p++)
+        (e = n[i][p]),
+          1 === t
+            ? '<' === e
+              ? (f(), (o = [o, '', null]), (t = 3))
+              : (u += e)
+            : 4 === t
+              ? '--' === u && '>' === e
+                ? ((t = 1), (u = ''))
+                : (u = e + u[0])
+              : r
+                ? e === r
+                  ? (r = '')
+                  : (u += e)
+                : '"' === e || "'" === e
+                  ? (r = e)
+                  : '>' === e
+                    ? (f(), (t = 1))
+                    : t &&
+                      ('=' === e
+                        ? ((t = 5), (l = u), (u = ''))
+                        : '/' === e && (t < 5 || '>' === n[i][p + 1])
+                          ? (f(),
+                            3 === t && (o = o[0]),
+                            (t = o),
+                            (o = o[0]).push(this.apply(null, t.slice(1))),
+                            (t = 0))
+                          : ' ' === e || '\t' === e || '\n' === e || '\r' === e
+                            ? (f(), (t = 2))
+                            : (u += e)),
+          3 === t && '!--' === u && ((t = 4), (o = o[0]))
+    }
+    return f(), o.length > 2 ? o.slice(1) : o[1]
+  })
+
+function h(type, props, ...children) {
+  return { type, props, children }
+}
+
+/**
+ * For htm license information please see ./vendors/htm/LICENSE.txt
+ * @license Apache <https://www.apache.org/licenses/LICENSE-2.0>
+ * @author Jason Miller <jason@developit.ca>
+ */
+export const html = htm.bind(h)

src/index.js

@@ -0,0 +1,2 @@
+export { WebComponent } from './WebComponent.js'
+export { html } from './html.js'

src/utils/create-element.mjs

@@ -0,0 +1,46 @@
+import { serialize } from './serialize.mjs'
+export function createElement(tree) {
+  if (!tree.type) {
+    if (Array.isArray(tree)) {
+      const frag = document.createDocumentFragment()
+      frag.replaceChildren(...tree.map((leaf) => createElement(leaf)))
+      return frag
+    }
+    return document.createTextNode(tree)
+  } else {
+    const el = document.createElement(tree.type)
+    /**
+     * handle props
+     */
+    if (tree.props) {
+      Object.entries(tree.props).forEach(([prop, value]) => {
+        const domProp = prop.toLowerCase()
+        if (domProp === 'style' && typeof value === 'object' && !!value) {
+          applyStyles(el, value)
+        } else if (prop in el) {
+          el[prop] = value
+        } else if (domProp in el) {
+          el[domProp] = value
+        } else {
+          el.setAttribute(prop, serialize(value))
+        }
+      })
+    }
+    /**
+     * handle children
+     */
+    tree.children?.forEach((child) => {
+      const childEl = createElement(child)
+      if (childEl instanceof Node) {
+        el.appendChild(childEl)
+      }
+    })
+    return el
+  }
+}
+
+function applyStyles(el, styleObj) {
+  Object.entries(styleObj).forEach(([rule, value]) => {
+    if (rule in el.style && value) el.style[rule] = value
+  })
+}

src/utils/deserialize.mjs

@@ -0,0 +1,11 @@
+export function deserialize(value, type) {
+  switch (type) {
+    case 'number':
+    case 'boolean':
+    case 'object':
+    case 'undefined':
+      return JSON.parse(value)
+    default:
+      return value
+  }
+}

src/utils/get-camel-case.mjs

@@ -0,0 +1,3 @@
+export function getCamelCase(kebab) {
+  return kebab.replace(/-./g, (x) => x[1].toUpperCase())
+}

src/utils/get-kebab-case.mjs

@@ -0,0 +1,6 @@
+export function getKebabCase(str) {
+  return str.replace(
+    /[A-Z]+(?![a-z])|[A-Z]/g,
+    ($, ofs) => (ofs ? '-' : '') + $.toLowerCase()
+  )
+}

src/utils/index.js

@@ -0,0 +1,5 @@
+export { serialize } from './serialize.mjs'
+export { deserialize } from './deserialize.mjs'
+export { getCamelCase } from './get-camel-case.mjs'
+export { getKebabCase } from './get-kebab-case.mjs'
+export { createElement } from './create-element.mjs'

src/utils/serialize.mjs

@@ -0,0 +1,10 @@
+export function serialize(value) {
+  switch (typeof value) {
+    case 'number':
+    case 'boolean':
+    case 'object':
+      return JSON.stringify(value)
+    default:
+      return value
+  }
+}

src/utils/serialize.test.mjs

@@ -0,0 +1,27 @@
+import { describe, expect, test } from 'vitest'
+import { serialize } from './serialize.mjs'
+
+describe('serialize', () => {
+  test('should stringify number', () => {
+    const result = serialize(3)
+    expect(result).toBeTypeOf('string')
+    expect(result).toEqual('3')
+  })
+
+  test('should stringify boolean', () => {
+    const result = serialize(false)
+    expect(result).toBeTypeOf('string')
+    expect(result).toEqual('false')
+  })
+
+  test('should stringify object', () => {
+    const result = serialize({ hello: 'world' })
+    expect(result).toBeTypeOf('string')
+    expect(result).toEqual('{"hello":"world"}')
+  })
+
+  test('should return undefined', () => {
+    const result = serialize(undefined)
+    expect(result).toBeUndefined()
+  })
+})

test/WebComponent.test.mjs

@@ -0,0 +1,25 @@
+import { beforeEach, describe, expect, it } from 'vitest'
+import { WebComponent } from '../src/WebComponent.js'
+
+let componentUnderTest
+
+describe('WebComponent', () => {
+  // Browsers throw an error when you instantiate a custom element class not in the registry
+  window.customElements.define('component-test', WebComponent)
+
+  beforeEach(() => {
+    componentUnderTest = new WebComponent()
+  })
+
+  it('is instantiated', () => {
+    expect(componentUnderTest).toBeDefined()
+  })
+
+  it('has a readonly template prop', () => {
+    expect(componentUnderTest.template).toBe('')
+    const assignToReadonly = () => {
+      componentUnderTest.template = 'should error'
+    }
+    expect(() => assignToReadonly()).toThrowError()
+  })
+})

test/utils/serialize.test.mjs

@@ -0,0 +1,27 @@
+import { describe, expect, test } from 'vitest'
+import { serialize } from '../../src/utils/serialize.mjs'
+
+describe('serialize', () => {
+  test('should stringify number', () => {
+    const result = serialize(3)
+    expect(result).toBeTypeOf('string')
+    expect(result).toEqual('3')
+  })
+
+  test('should stringify boolean', () => {
+    const result = serialize(false)
+    expect(result).toBeTypeOf('string')
+    expect(result).toEqual('false')
+  })
+
+  test('should stringify object', () => {
+    const result = serialize({ hello: 'world' })
+    expect(result).toBeTypeOf('string')
+    expect(result).toEqual('{"hello":"world"}')
+  })
+
+  test('should return undefined', () => {
+    const result = serialize(undefined)
+    expect(result).toBeUndefined()
+  })
+})

tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "allowJs": true,
+    "outDir": "dist",
+    "declaration": true,
+    "emitDeclarationOnly": true
+  },
+  "include": ["src/*", "src/utils/*"]
+}

vendors/htm/LICENSE.txt

@@ -0,0 +1,204 @@
+This license applies to parts of the `html` function originating from https://github.com/developit/htm project:
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
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vitest.config.mjs

@@ -0,0 +1,13 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  test: {
+    environment: 'happy-dom',
+    coverage: {
+      enabled: true,
+      provider: 'v8',
+      reporter: ['html', 'text'],
+      include: ['src'],
+    },
+  },
+})