debounceEarly - nodef/extra-function GitHub Wiki
Generate leading-edge debounced version of a function.
Alternatives: debounce, debounceEarly. Similar: throttle, debounce.
function debounceEarly(x, t, T)
// x: a function
// t: delay time (ms)
// T: max delay time [-1 ⇒ none]
const xfunction = require('extra-function');
var count = 0;
var fn = xfunction.debounceEarly(() => ++count, 1500);
setTimeout(fn, 0);
setTimeout(fn, 1000);
setTimeout(fn, 2000);
setTimeout(fn, 4000);
setTimeout(fn, 5000);
// `count` incremented after 0s
// `count` incremented after 4s
var count = 0;
var fn = xfunction.debounceEarly(() => ++count, 1500);
setTimeout(fn, 0);
setTimeout(fn, 500);
setTimeout(fn, 1000);
setTimeout(fn, 1500);
setTimeout(fn, 2000);
setTimeout(fn, 4000);
setTimeout(fn, 4500);
setTimeout(fn, 5000);
// `count` incremented after 0s
// `count` incremented after 4s
var count = 0;
var fn = xfunction.debounceEarly(() => ++count, 1500, 3500);
setTimeout(fn, 0);
setTimeout(fn, 1000);
setTimeout(fn, 2000);
setTimeout(fn, 3000);
setTimeout(fn, 4000);
setTimeout(fn, 6000);
// `count` incremented after 0s
// `count` incremented after 4s
// `count` incremented after 6s