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75 lines
1.9 KiB
75 lines
1.9 KiB
2 years ago
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/**
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* Debounce a function to delay invoking until wait (ms) have elapsed since the last invocation.
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* @param {function(...*): *} fn The function to be debounced.
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* @param {number} wait Milliseconds to wait before invoking again.
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* @return {function(...*): void} The debounced function.
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*/
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function debounce(fn, wait) {
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/**
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* A cached setTimeout handler.
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* @type {number | undefined}
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*/
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let timer;
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/**
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* @returns {void}
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*/
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function debounced() {
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const context = this;
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const args = arguments;
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clearTimeout(timer);
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timer = setTimeout(function () {
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return fn.apply(context, args);
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}, wait);
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}
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return debounced;
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}
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/**
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* Prettify a filename from error stacks into the desired format.
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* @param {string} filename The filename to be formatted.
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* @returns {string} The formatted filename.
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*/
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function formatFilename(filename) {
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// Strip away protocol and domain for compiled files
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const htmlMatch = /^https?:\/\/(.*)\/(.*)/.exec(filename);
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if (htmlMatch && htmlMatch[1] && htmlMatch[2]) {
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return htmlMatch[2];
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}
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// Strip everything before the first directory for source files
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const sourceMatch = /\/.*?([^./]+[/|\\].*)$/.exec(filename);
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if (sourceMatch && sourceMatch[1]) {
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return sourceMatch[1].replace(/\?$/, '');
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}
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// Unknown filename type, use it as is
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return filename;
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}
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/**
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* Remove all children of an element.
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* @param {HTMLElement} element A valid HTML element.
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* @param {number} [skip] Number of elements to skip removing.
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* @returns {void}
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*/
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function removeAllChildren(element, skip) {
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/** @type {Node[]} */
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const childList = Array.prototype.slice.call(
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element.childNodes,
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typeof skip !== 'undefined' ? skip : 0
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);
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for (let i = 0; i < childList.length; i += 1) {
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element.removeChild(childList[i]);
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}
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}
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module.exports = {
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debounce: debounce,
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formatFilename: formatFilename,
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removeAllChildren: removeAllChildren,
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};
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