try getting the event using the parameter passed (named e in this case). i tested this and both window.event and the e is supported in chrome. try checking for both, whichever exists var ex = { exampl: function(e){ console.log(window.event); console.log(e); //check if we have “e” or “window.event” and use them as “evt” var evt = … Read more
KeyPress event is invoked only for character (printable) keys, KeyDown event is raised for all including nonprintable such as Control, Shift, Alt, BackSpace, etc. UPDATE: The keypress event is fired when a key is pressed down and that key normally produces a character value Reference.
Your code is in the <head> => runs before the elements are rendered, so document.getElementById(‘compute’); returns null, as MDN promise… element = document.getElementById(id); element is a reference to an Element object, or null if an element with the specified ID is not in the document. MDN Solutions: Put the scripts in the bottom of the … Read more
You need to use querySelectorAll which will return a collection.Now use spread operator (three dots) to convert it to array and use forEach .Inside forEach callback add the event listener to it […document.querySelectorAll(‘.breakdown’)].forEach(function(item) { item.addEventListener(‘click’, function() { console.log(item.innerHTML); }); }); <button id=’btn-1′ type=”button” name=”first” class=”breakdown main-text”> Breakdown Start </button> <button id=’btn-2′ type=”button” name=”second” class=”breakdown main-text” … Read more
iframe doesn’t have onclick event but we can implement this by using iframe’s onload event and javascript like this… function iframeclick() { document.getElementById(“theiframe”).contentWindow.document.body.onclick = function() { document.getElementById(“theiframe”).contentWindow.location.reload(); } } <iframe id=”theiframe” src=”https://stackoverflow.com/questions/6452502/youriframe.html” style=”width: 100px; height: 100px;” onload=”iframeclick()”></iframe> I hope it will helpful to you….
There is no way to cleanly remove an event handler unless you stored a reference to the event handler at creation. I will generally add these to the main object on that page, then you can iterate and cleanly dispose of them when done with that object.
The usage of both is similar, though both take on a slightly different syntax for the event parameter: addEventListener (mdn reference): Supported by all major browsers (FF, Chrome, Edge) obj.addEventListener(‘click’, callback, false); function callback(){ /* do stuff */ } Events list for addEventListener. attachEvent (msdn reference): Supported by IE 5-8* obj.attachEvent(‘onclick’, callback); function callback(){ /* … Read more
I think that the fastest way to do this is to just clone the node, which will remove all event listeners: var old_element = document.getElementById(“btn”); var new_element = old_element.cloneNode(true); old_element.parentNode.replaceChild(new_element, old_element); Just be careful, as this will also clear event listeners on all child elements of the node in question, so if you want to … Read more
Some compact syntax that achieves the desired result, POJS: “mousemove touchmove”.split(” “).forEach(function(e){ window.addEventListener(e,mouseMoveHandler,false); });
I think the easiest approach would be to just check that el is not null before adding an event listener: var el = document.getElementById(‘overlayBtn’); if(el){ el.addEventListener(‘click’, swapper, false); }