Stoping the function flow along with other eg events towards a similar 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.

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.

By using the stopImmediatePropagation() doesn’t avoid default incidents. Internet browser standard occurrences still score invoked and simply contacting preventDefault() stop such incidents.

Custom situations

A creator isn’t limited to the fresh predetermined feel products. Its potential to add and you will invoke a personalized experiences, making use of the addEventListener() method such as for example regular in combiniation having document.createEvent(), initCustomEvent(), and you will dispatchEvent(). Regarding the code below I carry out a personalized enjoy called goBigBlue and invoke one to experiences.

Cards

The brand new DOM cuatro specifiction added a good CustomEvent() constructor who’s got simplistic living stage out of a personalized skills however, its not supported during the ie9 so when with the writting and that’s nevertheless inside flux

Simulating/Creating mouse occurrences

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 dating apps for Polyamorous adults 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/causing mouse situations only at that creating performs throughout modern browsers. Simulating almost every other event items quickly gets to be more difficult and you will leverage simulate.js otherwise jQuery (e.g. jQuery trigger() 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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