Event handlers in react passes an instances of SyntheticEvent, a cross-browser wrapper around the browser’s native event. The term capture is not related to React. In fact it’s a concept from DOM HTML Event. The are 3 general phases of event propagation DOM Events: The capture phase: The event object propagates through the target’s ancestors … Read more
Disabled elements do not fire events, e.g. users cannot hover or click them to trigger a popover (or tooltip). You can however wrap the disabled element with a DIV and listen to the event fired on that element instead.
To swap two divs without losing event handlers or breaking DOM references, you can just move them in the DOM. The key is NOT to change the innerHTML because that recreates new DOM nodes from scratch and all prior event handlers on those DOM objects are lost. But, if you just move the DOM elements … Read more
setTimeout is compatible with all browsers since 1996. You should avoid the evaluation of “functionName()” and instead do: setTimeout(functionName,5000) UPDATE: If you initially expect a variable passed to the function and none when in the timeout, you need to do this instead: setTimeout(function() { functionName() },5000) However you are calling the onload incorrectly, so you … Read more
As a data point, the WebKit implementation (used by Safari and Chrome) doesn’t currently enforce any limits (other than those imposed by running out of memory). Source : https://lists.w3.org/Archives/Public/public-whatwg-archive/2009Oct/0546.html
Just another to throw in the mix. I recently released one called Mousetrap. You can check out examples at http://craig.is/killing/mice
We solved this by just adding a little jQuery extension that inserts events at the head of the event chain: $.fn.bindFirst = function(name, fn) { var elem, handlers, i, _len; this.bind(name, fn); for (i = 0, _len = this.length; i < _len; i++) { elem = this[i]; handlers = jQuery._data(elem).events[name.split(‘.’)[0]]; handlers.unshift(handlers.pop()); } }; Then, to … Read more
Use once if you don’t need to support Internet Explorer: element.addEventListener(event, func, { once: true }); Otherwise use this: function addEventListenerOnce(target, type, listener, addOptions, removeOptions) { target.addEventListener(type, function fn(event) { target.removeEventListener(type, fn, removeOptions); listener.apply(this, arguments); }, addOptions); } addEventListenerOnce(document.getElementById(“myelement”), “click”, function (event) { alert(“You’ll only see this once!”); }); https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/removeEventListener http://www.sitepoint.com/create-one-time-events-javascript/ https://www.webreflection.co.uk/blog/2016/04/17/new-dom4-standards
Angular digests are triggered – they don’t happen through polling. Code executes, after code is done, angular triggers a digest. Example: element.on(‘click’, function() { $scope.$apply(function() { // do some code here, after this, $digest cycle will be triggered }); }); Angular will also trigger a $digest after the compile/link phase: Compile > Link > Digest … Read more