How do we emulate touch events in Safari Responsive Design Mode?
You can install Apple xCode. After installation, search Simulator through Spotlight. With Simulator you can open Safari and simulate yours websites with touch control.
dom-events
Native addEventListener with selector like .on() in jQuery
To perform event delegation natively: parent.addEventListener(‘click’, function(e) { if(e.target.classList.contains(‘myclass’)) { // this code will be executed only when elements with class // ‘myclass’ are clicked on } }); The efficiency you are referring to has to do with how many event handlers you add. Imagine a table with 100 rows. It is much more efficient … Read more
What’s the difference between event handlers & listener?
A handler and a listener are one in the same – just synonyms for the function that will handle an event. “Handler” is probably the more accepted term, and is certainly more semantically correct to me. The term “listener” is derived from the code used to add an event to an element: element.addEventListener(‘click’, function() { … Read more
Add Vue.js event on window
You should just do it manually during the creation and destruction of the component … created: function() { window.addEventListener(‘mousemove’,this.move); }, destroyed: function() { window.removeEventListener(‘mousemove’, this.move); } …
Cannot read property length of undefined
The id of the input seems is not WallSearch. Maybe you’re confusing that name and id. They are two different properties. name is used to define the name by which the value is posted, while id is the unique identification of the element inside the DOM. Other possibility is that you have two elements with … Read more
Force re-firing of all (scripts / functions) on ajaxed content
The solution you choose here will have to depend on how the scripts are initialized. There are a couple common possibilities: The script’s actions are evoked immediately upon loading of the script. In this case, the script might look something like this: (function() { console.log(‘Running script…’); })(); The script’s actions are evoked in response to … Read more
Way to know if user clicked Cancel on a Javascript onbeforeunload Dialog?
You can do it like this: $(function() { $(window).bind(‘beforeunload’, function() { setTimeout(function() { setTimeout(function() { $(document.body).css(‘background-color’, ‘red’); }, 1000); },1); return ‘are you sure’; }); }); The code within the first setTimeout method has a delay of 1ms. This is just to add the function into the UI queue. Since setTimeout runs asynchronously the Javascript … Read more
Is event a global variable that is accessible everywhere inside the callback chain?
One can access the current event through window.event. Just using event is implicitly accessing window.event.
Implementing jQuery’s “live” binder with native Javascript
Here’s a simple example: function live(eventType, elementId, cb) { document.addEventListener(eventType, function (event) { if (event.target.id === elementId) { cb.call(event.target, event); } }); } live(“click”, “test”, function (event) { alert(this.id); }); The basic idea is that you want to attach an event handler to the document and let the event bubble up the DOM. Then, check … Read more
event.keyCode constants
You can define the KeyEvent object if it doesn’t exist: if (typeof KeyEvent == “undefined”) { var KeyEvent = { DOM_VK_CANCEL: 3, DOM_VK_HELP: 6, DOM_VK_BACK_SPACE: 8, DOM_VK_TAB: 9, DOM_VK_CLEAR: 12, DOM_VK_RETURN: 13, DOM_VK_ENTER: 14, DOM_VK_SHIFT: 16, DOM_VK_CONTROL: 17, DOM_VK_ALT: 18, DOM_VK_PAUSE: 19, DOM_VK_CAPS_LOCK: 20, DOM_VK_ESCAPE: 27, DOM_VK_SPACE: 32, DOM_VK_PAGE_UP: 33, DOM_VK_PAGE_DOWN: 34, DOM_VK_END: 35, DOM_VK_HOME: … Read more