While working around to boost performance for progressive web apps, I came across a new feature Passive Event Listeners and I find it hard to understand the concept.  What are Passive Event Listeners and what is the need to have it in our projects?...
I don't know what I am doing wrong but here is an example of what I am doing and it doesn't seem to work.  someDom.addEventListener('mousemove',function(ev) {self.onInputMove(ev)},false);  someDom.removeEventListener('mousemove...
Some of the third party plugin will attach the eventListener into the site. How to I remove the eventListener without knowing the function that attached.   I refer this removeEventListener but I can't get any clue to remove this.   Eg: getEventLi...
Are there ways for me to listen for onblur or onclick events in javascript from an onload function? instead of doing it in the element itself.  <input type="button" id="buttonid" value="click" onclick="func()">...
Ok, I have been trying to figure this out for a long time now and finally have the time to investigate. As the title suggests "What is the difference"? I know that this works the way I want it to.      addLoadEvent(converter);  // Converter f...
I've got an HTML page (the parent) with an embedded IFRAME. The parent page has a couple of event listeners for mouse and keyboard events, as shown below (I'm using the Prototype library).   var IdleMonitor = Class.create({      active: null,...
I am trying to remove the onClick tags in my html and add an EventListener to my external js-file instead, but can't seem to get it to work.  The following lines work:  <input type="text" name="text" id="test"> <i...
I have an element with a "pointerMove" EventListener added to it. Now when moving my mouse around, I can measure the number of data points "pointerMove" delivers per second (pps) by counting the total number of points drawn since "...
I'm making an extension for safari I created a context item with command = showNote  In debugger I get the follwing error TypeError: Result of expression 'safari.application' [undefined] is not an object on line 8(the last line)   are the...
This seems to be a very popular question though i didn't seem to find any pertinat answers.   I attach an event listen like :   window.addEventListener('scroll', fnName, false);   The problem is that fnName expect several parameters, so i...

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