woocommerce/plugins/woocommerce-blocks/assets/js/interactivity/utils.js

64 lines
1.7 KiB
JavaScript

import { useRef, useEffect } from 'preact/hooks';
import { effect } from '@preact/signals';
function afterNextFrame( callback ) {
const done = () => {
cancelAnimationFrame( raf );
setTimeout( callback );
};
const raf = requestAnimationFrame( done );
}
// Using the mangled properties:
// this.c: this._callback
// this.x: this._compute
// https://github.com/preactjs/signals/blob/main/mangle.json
function createFlusher( compute, notify ) {
let flush;
const dispose = effect( function () {
flush = this.c.bind( this );
this.x = compute;
this.c = notify;
return compute();
} );
return { flush, dispose };
}
// Version of `useSignalEffect` with a `useEffect`-like execution. This hook
// implementation comes from this PR:
// https://github.com/preactjs/signals/pull/290.
//
// We need to include it here in this repo until the mentioned PR is merged.
export function useSignalEffect( cb ) {
const callback = useRef( cb );
callback.current = cb;
useEffect( () => {
const execute = () => callback.current();
const notify = () => afterNextFrame( eff.flush );
const eff = createFlusher( execute, notify );
return eff.dispose;
}, [] );
}
// For wrapperless hydration.
// See https://gist.github.com/developit/f4c67a2ede71dc2fab7f357f39cff28c
export const createRootFragment = ( parent, replaceNode ) => {
replaceNode = [].concat( replaceNode );
const s = replaceNode[ replaceNode.length - 1 ].nextSibling;
function insert( c, r ) {
parent.insertBefore( c, r || s );
}
return ( parent.__k = {
nodeType: 1,
parentNode: parent,
firstChild: replaceNode[ 0 ],
childNodes: replaceNode,
insertBefore: insert,
appendChild: insert,
removeChild( c ) {
parent.removeChild( c );
},
} );
};