2627. Debounce

https://leetcode.com/problems/debounce/

Javascript

var debounce = function(fn, t) {
    let timer
    return function(...args) {
        if (timer) {
            clearTimeout(timer)
        }
        timer = setTimeout(() => fn(...args), t)
    }
};

Typescript

type F = (...p: any[]) => any

function debounce(fn: F, t: number): F {
    let timer: ReturnType<typeof setTimeout> | undefined;
    return function(...args) {
        if (timer)  {
            clearTimeout(timer)
        }
        timer = setTimeout(() => fn(...args), t)
    }
}