I’d like to detect an event of attaching shadow to the host element. Use-case: using MutationObserver to watch any DOM changes and post-process the changed content as part of binding (tying) framework’s logic. Why do I need to detect this event? In order to be able to watch for a changes within th…
Tag: events
javascript/browser: when does event dispatching exactly happen?
This SO question & answers and DOM level3 docs states that manual events are dispatched synchronously in browsers. My question, however, relates to user-related events (real clicks), not manually triggered ones. I created a small jsfiddle demo with a button + onclick handler, the handler does some synchro…
Prevent click event being triggered on children elements
I don’t understand why when I add a click event listener on an element, its children triggers it too. I want that the parent is triggered even if the children are clicked, which should be the normal behavior I think. Here’s the code : Answer You can use e.target to check what has been clicked, the…
JWplayer multiple player in one page and event handler
Scenario I have multiple players in the same page. Each instance loads a different video. I need to handle similar events for every instance. Problem If I just declare the events on a general function – like this jwplayer().on(‘play’, handler) – the handler affects only the first player of the pag…
How to removeEventListener on a callback with .bind(this) attached
If I do: and then inside function this.foo then remove it with: then it works. However if I do: then the function is not removed. Is there anything I can do? I must have the correct context inside foo. Answer this.foo.bind(this) is returning a function which is different than the function this.foo. So, what y…
How to detect single control keyup event but not key combinations?
It is easy to detect control key event with The problem is that any key combinations such as control-c and control-v will also trigger the event, and it seems that the event handler cannot distinguish between a single control and the control within a control-c. What I want is to allow only a single key press-…
GA send event, returns undefined
Innit GA Track event But this allways return undefined, And I added the ‘Registration’ event (with that category, label and value) in conversions, at google analytics site, Any idea why this could happen? Of course it isn’t tracked.. Answer You are mixing old-style classic syntax (using the …
Execute Commands after print window is closed
I’m printing a web page using the code below: I want to execute a few commands after the Print dialog is closed. How can I detect it? Answer
JavaScript registering events handlers externally
I have decided to remove all calls to JavaScript event from the html form elements to an external file. In doing this i registered an event for each item. However access the elements attributes using ‘this’ can no longer be used what I have decided to use is event.target.value for value attribute …
jQuery events function for ‘html’ but not CSS
Nothing happens. No errors in the console are shown. No matter what event – click, hover, etc – they only work if I apply them to the ‘html’ tag. First part of the code works perfectly, I mean the .css. What kind of sorcery is this? Answer Grrr… I figured it out. The whole code n…