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wcb/README.md
Ayo 248ef14322 fix: no TypeErorr for default props; add strictProps 
- Remove thrown error if type difference is found in defined props
- Introduce strictProps toggle for error behavior
- Extract size changes to its own log file
2026-07-05 11:11:36 +02:00

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Web Component Base

Note

What's next: correctness fixes. Thanks to feedback from teams building on WCB, our immediate focus is a set of state-corruption fixes: no attribute writes in the constructor, correct handling of empty-string and removed attributes (so render()/onChanges are never silently skipped), removing the props proxy's first-write type lock, and safe cloning of static props defaults. Detailed issues will follow.

Package information: NPM version Package information: NPM license Package information: NPM downloads Bundle Size

🤷‍♂️ zero-dependency, 🤏 tiny JS base class for creating reactive custom elements easily ✨

counter example code snippet

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

Want to get in touch?

There are many ways to get in touch:

  1. Open a GitHub issue or discussion
  2. Submit a ticket via SourceHut todo
  3. Email me: hi@ayo.run

Inspirations and thanks

  1. 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.
  2. fast - When I found that Microsoft has their own base class I thought it was super cool!
  3. lit - lit-html continues to amaze me and I worked to make wcb generic so I (and others) can continue to use it

Size change log

See size-change-log.md for a running record of how each correctness/feature change affects the WebComponent base class bundle size, with the reason and benefit of each.

Just keep building.
A project by Ayo