ts_temp/function/throttleEnd.js
import curryN from './curryN';
/**
* Creates a throttled function that only invokes `fn` at most once per
* every `wait` milliseconds. `fn` is called in the end of `wait` delay
*
* @param {number} wait The number of milliseconds to throttle invocations to.
* @param {Function} fn The function to throttle.
*/
export default curryN(2, (wait, fn) => {
let lastCalled;
let lastArgs;
let lastThis;
let timeout;
return function (...args) {
const now = Date.now();
const diff = lastCalled + wait - now;
if (diff < 0 && timeout) {
clearTimeout(timeout);
timeout = null;
fn.apply(this, args);
}
else if (!timeout) {
timeout = setTimeout(() => {
fn.apply(lastThis, lastArgs);
timeout = null;
}, wait);
}
lastCalled = now;
lastArgs = args;
lastThis = this;
};
});