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debounceEarly

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Subhajit Sahu edited this page Jul 22, 2022 · 2 revisions

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 {debounceEarly} = require('extra-function');


var count = 0;
var fn = 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 = 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 = 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


References

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