07/06/2020; 6 minutes to read; In this article. Applications }); Design System Any handling event can stop propagation by calling stopPropagation() on the event. The stopPropagation() method prevents propagation of the same event from being called.. Propagation means bubbling up to parent elements or capturing down to child elements. In addition to this being a bad idea because it alters global behavior, it’s a bad idea because it puts the menu hiding logic in two different and unrelated places, making it far more fragile than necessary. If we were to remove support for stopPropagation from our wrapper, can we still make an implementation for our row interactions? You can use transparent overlay to allow users to clicks outside the modal for closing without having to use event stop propagation: Here, the users thinks that they are clicking parts of the document outside of the modal, in fact they are clicking the .overlay element that covers the whole page. } else { function once(el, event_type, event_handler) { once(document, "mousemove", place); you’re not intended to) positioned and z-indexed locally. There were 4 different menus/popups that needed to close if the user clicked outside them (which by the way was the ONLY thing they needed to do and NO other code needed to know their state).
document.write("" + u + " " + d + ""); This is where stopPropagation comes in. How to detect a click outside an element? https://github.com/dekajp/google-closure-grid. http://bassta.bg/2013/08/detect-click-event-outside-element/, https://github.com/dekajp/google-closure-grid. el.innerHTML = e; Array.prototype.forEach.call(social_buttons_element.getElementsByTagName("a"), function (link_element) { He is going to explain why stopping event propagation isn’t something you should do lightly, and probably something you should avoid altogether. Of course, in a more general event handler you would probably use a virtual CSS class for all objects that need to be hidden when clicked outside, e.g. el.innerHTML = dobf(i, 7); widgets Similarly, events handled by .delegate() will propagate to the elements to which they are delegated; event handlers bound on any elements below it in the DOM tree will already have been executed by the time the delegated event handler is called. No. el.removeEventListener(event_type, handle_once, false) : el.detachEvent("on" + event_type, handle_once);
The implication of this is that a click on the checkbox causes a click event on the checkbox and on the row. Since the .live() method handles events once they have propagated to the top of the document, it is not possible to stop propagation of live events. I think it makes far more sense to listen for the “closing click” only if the menu/popup has been opened. Frequently, developers stop event propagation without even realizing it.
With today’s modern browsers, however, any performance gains you get from stopping event propagation will likely go unnoticed by your users. The stopPropagation() method of the Event interface prevents further propagation of the current event in the capturing and bubbling phases. Razor components provide event handling features.
Stopping propagation should be thought of like canceling an event, and it should only be used with that intent. I also Capture phase—The framework executes the capture phase from the application root to the source component until all components are traversed. This leads us into my analysis of event.stopPropagation(). } event_handler(); I had been wondering about the distinction of return false amongst inline JS, jQuery, and traditional JS.
In these cases you’re stopping propagation because you don’t want an event to happen, not because you have an unwanted event handler registered higher up in the DOM. It’s much better to be explicit with your intentions and call those event methods directly. }); This is the capturing phase. }); As a general rule, stopping event propagation should never be a solution to a problem. With our wrappers we can restrict or alter functionality so we keep the modularity contract intact.
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