66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
/** @odoo-module */
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import { browser } from "@web/core/browser/browser";
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/**
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* Returns a function, that, when invoked, will only be triggered at most once
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* during a given window of time. Normally, the throttled function will run
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* as much as it can, without ever going more than once per `wait` duration;
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* but if you'd like to disable the execution on the leading edge, pass
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* `{leading: false}`. To disable execution on the trailing edge, ditto.
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*
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* credit to `underscore.js`
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*/
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function throttle(func, wait, options) {
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let timeout, context, args, result;
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let previous = 0;
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if (!options) {
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options = {};
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}
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const later = function () {
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previous = options.leading === false ? 0 : luxon.DateTime.now().ts;
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timeout = null;
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result = func.apply(context, args);
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if (!timeout) {
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context = args = null;
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}
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};
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const throttled = function () {
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const _now = luxon.DateTime.now().ts;
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if (!previous && options.leading === false) {
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previous = _now;
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}
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const remaining = wait - (_now - previous);
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context = this;
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args = arguments;
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if (remaining <= 0 || remaining > wait) {
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if (timeout) {
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browser.clearTimeout(timeout);
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timeout = null;
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}
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previous = _now;
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result = func.apply(context, args);
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if (!timeout) {
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context = args = null;
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}
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} else if (!timeout && options.trailing !== false) {
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timeout = browser.setTimeout(later, remaining);
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}
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return result;
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};
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throttled.cancel = function () {
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browser.clearTimeout(timeout);
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previous = 0;
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timeout = context = args = null;
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};
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return throttled;
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}
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export const timings = {
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throttle,
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};
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