froebel/debounce.mjs

TypeScript utility library

export const cancel = Symbol("debounce.cancel");
/**
 * Creates a debounced function that delays invoking `fun` until `ms` milliseconds
 * have passed since the last invocation of the debounced function.
 *
 * `fun` is invoked with the last arguments passed to the debounced function.
 *
 * Calling `[debounce.cancel]()` on the debounced function will cancel the currently
 * scheduled invocation.
 */

const debounce = Object.assign((fun, ms) => {
  let toId;
  return Object.assign((...args) => {
    clearTimeout(toId);
    toId = setTimeout(() => fun(...args), ms);
  }, {
    [cancel]: () => clearTimeout(toId)
  });
}, {
  cancel
});
export default debounce;