This has been changed with DOM3! While the DOM level 2 events specification did state When the event reaches the target, any event listeners registered on the EventTarget are triggered. Although all EventListeners on the EventTarget are guaranteed to be triggered by any event which is received by that EventTarget, no specification is made as … Read more
Well blocking IO means that a given thread cannot do anything more until the IO is fully received (in the case of sockets this wait could be a long time). Non-blocking IO means an IO request is queued straight away and the function returns. The actual IO is then processed at some later point by … Read more
Lock is a questionable idea in JS which is intended to be threadless and not needing concurrency protection. You’re looking to combine calls on deferred execution. The pattern I follow for this is the use of callbacks. Something like this: var functionLock = false; var functionCallbacks = []; var lockingFunction = function (callback) { if … Read more
Use return false instead. You can see the code below working here. $(“a”).click(function() { return false; }); $(“.toolbar a”).click(function() { alert(“Do something”); }); As pointed by @raina77ow with this article, using return false is the same as calling event.preventDefault() and also event.stopPropagation(). As I had troubles without return false on some codes in the past, … Read more
Refer to http://api.jquery.com/on/ It says In all browsers, the load, scroll, and error events (e.g., on an <img> element) do not bubble. In Internet Explorer 8 and lower, the paste and reset events do not bubble. Such events are not supported for use with delegation, but they can be used when the event handler is … Read more
I recently had to implement a scanner system to interact with java. I used Honeywell Voyager MS9540 USB barcode scanner. As a default the scanner sent the data straight as keyboard input – no driver required. But it was very easy to get this model to interact directly with java rather than using a keyboard … Read more
You can’t invoke an event which is owned by another type. An event can only be invoked from the inside of the class which declares it.
Set AutoCheck to false. Override OnClick to manual check the checkbox
removeListener takes an argument. You need to name the listener function and then remove it by name: function doStuff(request){ chrome.extension.onRequest.removeListener(doStuff); other_function(request); } chrome.extension.onRequest.addListener(doStuff); Or, more succinctly: chrome.extension.onRequest.addListener( function doStuff(request){ chrome.extension.onRequest.removeListener(doStuff); other_function(request); } );