1.3 KiB
1.3 KiB
Web Component Base Class
This is a base JavaScript class for creating Web Components easily.
Installation
npm i web-component-base
Usage
When you extend the 'WebComponent' class for your component, you only have to define the template() and observedAttributes(), and the UI will be reactive on attribute changes.
// HelloWorld.mjs
import { WebComponent } from "./WebComponent.mjs";
export 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>`;
}
}
Then changes in the attributes observed will cause the UI to render.
<head>
...
<script type="module">
import {HelloWorld} from './HelloWorld.mjs';
customElements.define('hello-world', HelloWorld);
</script>
</head>
<body>
<hello-world name="Ayo" emotion="sad">
<script>
const helloWorld = document.querySelector('hello-world');
setTimeout(() => {
helloWorld.setAttribute('emotion', 'excited');
}, 2500)
</script>
</body>
