forked from boranton/testcafe-workshop
62 lines
1.8 KiB
JavaScript
Executable File
62 lines
1.8 KiB
JavaScript
Executable File
export {qs, qsa, removeClass, $on, $delegate, $parent}
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// Get element(s) by CSS selector:
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function qs(selector, scope) {
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return (scope || document).querySelector(selector)
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}
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function qsa(selector, scope) {
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return (scope || document).querySelectorAll(selector)
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}
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function removeClass(el, className) {
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if (el.length) {
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for (var i = 0; i < el.length; i++) {
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removeClass(el[i], className)
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}
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return
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}
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if (el.classList) {
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el.classList.remove(className)
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} else {
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el.className = el.className.replace(new RegExp('(^|\\b)' + className.split(' ').join('|') + '(\\b|$)', 'gi'), ' ')
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}
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}
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// addEventListener wrapper:
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function $on(target, type, callback, useCapture) {
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target.addEventListener(type, callback, !!useCapture)
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}
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// Attach a handler to event for all elements that match the selector,
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// now or in the future, based on a root element
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function $delegate(target, selector, type, handler) {
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// https://developer.mozilla.org/en-US/docs/Web/Events/blur
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var useCapture = type === 'blur' || type === 'focus'
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$on(target, type, dispatchEvent, useCapture)
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function dispatchEvent(event) {
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var targetElement = event.target
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var potentialElements = qsa(selector, target)
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var hasMatch = Array.prototype.indexOf.call(potentialElements, targetElement) >= 0
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if (hasMatch) {
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handler.call(targetElement, event)
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}
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}
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}
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// Find the element's parent with the given tag name:
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// $parent(qs('a'), 'div');
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function $parent(element, tagName) {
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if (!element.parentNode) {
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return undefined
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}
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if (element.parentNode.tagName.toLowerCase() === tagName.toLowerCase()) {
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return element.parentNode
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}
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return $parent(element.parentNode, tagName)
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}
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// Allow for looping on nodes by chaining:
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// qsa('.foo').forEach(function () {})
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NodeList.prototype.forEach = Array.prototype.forEach
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