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| /** | |
| * utils.js: Shared helpers | |
| */ | |
| /** | |
| * Returns a debounced version of fn that fires after `delay` ms of inactivity. | |
| * The returned function also exposes cancel(), so a caller that's about to | |
| * issue an equivalent call immediately (bypassing the debounce) can drop any | |
| * pending trailing call instead of leaving it to fire later against a | |
| * position that's no longer current. | |
| * @param {Function} fn | |
| * @param {number} delay | |
| */ | |
| export function debounce(fn, delay) { | |
| let timer; | |
| const debounced = function (...args) { | |
| clearTimeout(timer); | |
| timer = setTimeout(() => fn.apply(this, args), delay); | |
| }; | |
| debounced.cancel = () => clearTimeout(timer); | |
| return debounced; | |
| } |