Stoping case disperse and also other eg occurrences into the same target having fun with stopImmediatePropagation()

Calling stopProgagation() from within an event handler/listener will stop the capture and bubble event flow phases, but any events directly attached to the node or object will still be invoked. In the code below the onclick event attached to the is never gets invoked because we are stopping the event from bubbling up the DOM when clicking on the

Notice that other click events attached to the the

still get invoked! Additionally using stopPropagation() does not prevent default events. Had the

in our code example been a with an href value calling stopPropagation would not have stopped the browser default events from getting invoked.

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Calling the stopImmediatePropagation() from within an event handler/listener will stop the event flow phases (i.e. stopPropagation()), as well as any other like events attached to the event target that are attached after the event listener that invokes the stopImmediatePropagation() method. In the code example below If we call stopImmediatePropagation()from the second event listener attached to the

the click event that follows will not get invoked.

Utilising the stopImmediatePropagation() will not end standard events. Browser default events however get invoked and just calling preventDefault() will minimize this type of events.

Customized situations

A developer is not restricted to the new predefined skills sizes. Its likely to attach and you can invoke a customized skills, utilizing the addEventListener() approach such as normal in the combiniation having document.createEvent(), initCustomEvent(), and dispatchEvent(). In the code less than I manage a custom made experience called goBigBlue and invoke that event.

Cards

The newest DOM 4 specifiction additional an effective CustomEvent() constructor who’s basic living course regarding a customized experiences however, it’s just not served into the ie9 and also as of writting and is nevertheless when you look at the flux

Simulating/Triggering mouse events

Simiulating an event is not unlike creating a custom event. In the case of simulating a mouse event we create a ‘MouseEvent’ using document.createEvent(). Then, using initMouseEvent() we setup the mouse event that is going to occur. Next the mouse event is dispatched on the element that we’d like to simulate an event on (i.e the

in the html document). In the code below a click event is attached to the

in the page. Instead of clicking the

to invoke the click event the event is triggered or simulated by programatically setting up a mouse event and dispatching the event to the

Notes

Simulating/leading to mouse occurrences at this writing work in most modern web browsers. Simulating almost every other enjoy models rapidly gets to be more challenging and you will leveraging replicate.js otherwise jQuery (age.grams. jQuery lead to() method) will get neccsary.

Experience delegation

Event delegation, stated simply, is the programmatic act of leveraging the event flow and a single event listener to deal with multiple event targets. A side effect of event delegation is that the event targets don’t have to be in the DOM when the event is created in order for the targets to respond to the event. This is of course rather handy when dealing with XHR responses that update the DOM. By implementing event delegation new content that is added to the DOM post JavaScript load parsing can immediately start responding to events. Imagine you have a table with an unlimited number of rows and columns. Using event delegation we can add a single event listener to the

node which acts as a delegate for the node or object that is the initial target of the event. In the code example below, clicking any of the

‘s (i.e. the target of the event) will delegate its event to the click listener on the

. Don’t forget this is all made possible because of the event flow and in this specific case the bubbling phase.

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