@wc-bindable/react

React adapter for the wc-bindable protocol.

Install

npm install @wc-bindable/react react

Usage

import { useWcBindable } from "@wc-bindable/react";

function App() {
  const [ref, values] = useWcBindable<HTMLElement>({ value: "" });

  return (
    <>
      <my-input ref={ref} />
      <p>Current value: {values.value as string}</p>
    </>
  );
}

API

useWcBindable<T, V>(initialValues?, options?)

| Parameter | Type | Description | |---|---|---| | T | generic | The element type (e.g. HTMLElement) | | V | generic | Optional shape of the bindable values object | | initialValues | Partial<V> | Optional initial values for bindable properties | | options | { syncOn? } | Forwarded to bind(). Defaults to syncOn: "define" — see Late-defined elements |

Returns: [ref, values]

| Return | Type | Description | |---|---|---| | ref | (node: T \| null) => void | Callback ref to attach to the target element | | values | V | Reactive object containing the latest property values |

• Automatically calls bind() on mount and cleans up on unmount.
• If the element does not implement wc-bindable — and is not a custom element still waiting for its definition — the hook is a no-op. See Late-defined elements.

Late-defined elements

bind() is called with syncOn: "define" by default, so an element whose custom element definition arrives after this adapter runs — import-map autoloading, a CDN <script type="module">, a code-split route — still binds once the definition lands. Nothing has to re-run, and no re-render is needed.

Before this default, a not-yet-upgraded element was skipped permanently and silently: discovery failed, the adapter returned early, and because the element keeps its identity across upgrade nothing ever noticed. Opt back into that behavior with syncOn: "call".

const [ref, values] = useWcBindable<HTMLElement>({ value: "" }, { syncOn: "call" });

See SPEC.md § Deferring Discovery Until Definition.

Specification

The protocol contract this adapter implements lives in SPEC.md; the optional input/command invocation surface and the remote wire format live in SPEC-extensions.md. Runnable conformance vectors are in CONFORMANCE.md.

License

MIT