You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
/*global NodeList */
|
|
(function (window) {
|
|
'use strict';
|
|
|
|
// Get element(s) by CSS selector:
|
|
window.qs = function (selector, scope) {
|
|
return (scope || document).querySelector(selector);
|
|
};
|
|
window.qsa = function (selector, scope) {
|
|
return (scope || document).querySelectorAll(selector);
|
|
};
|
|
|
|
// addEventListener wrapper:
|
|
window.$on = function (target, type, callback, useCapture) {
|
|
target.addEventListener(type, callback, !!useCapture);
|
|
};
|
|
|
|
// Attach a handler to event for all elements that match the selector,
|
|
// now or in the future, based on a root element
|
|
window.$delegate = function (target, selector, type, handler) {
|
|
function dispatchEvent(event) {
|
|
var targetElement = event.target;
|
|
var potentialElements = window.qsa(selector, target);
|
|
var hasMatch = Array.prototype.indexOf.call(potentialElements, targetElement) >= 0;
|
|
|
|
if (hasMatch) {
|
|
handler.call(targetElement, event);
|
|
}
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/Events/blur
|
|
var useCapture = type === 'blur' || type === 'focus';
|
|
|
|
window.$on(target, type, dispatchEvent, useCapture);
|
|
};
|
|
|
|
// Find the element's parent with the given tag name:
|
|
// $parent(qs('a'), 'div');
|
|
window.$parent = function (element, tagName) {
|
|
if (!element.parentNode) {
|
|
return;
|
|
}
|
|
if (element.parentNode.tagName.toLowerCase() === tagName.toLowerCase()) {
|
|
return element.parentNode;
|
|
}
|
|
return window.$parent(element.parentNode, tagName);
|
|
};
|
|
|
|
// Allow for looping on nodes by chaining:
|
|
// qsa('.foo').forEach(function () {})
|
|
NodeList.prototype.forEach = Array.prototype.forEach;
|
|
})(window);
|