TLDR; Since this answer has drawn some attention, I’ve just developed an npm package based on it to allow everyone to use it as an independent package/library in their projects. I also wrote a story on the Hackernoon and went through the details about this answer (This is published in more than 10 languages, so … Read more
For console application you can do this, the do while loop runs untill you press x public class Program { public static void Main() { ConsoleKeyInfo keyinfo; do { keyinfo = Console.ReadKey(); Console.WriteLine(keyinfo.Key + ” was pressed”); } while (keyinfo.Key != ConsoleKey.X); } } This will only work if your console application has focus. If … Read more
You can call an async function from your EventListener. The first problem I see is that you are invoking the callback function right away in the second argument of window.addEventListener by including it as loadEdit() instead of loadEdit or () => loadEdit(). You have to give it a function as second argument, right now you … Read more
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
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); } );
Have you tried maintaining a reference to the anonymous function (like you suggested)? So: var listener = function() { check_pos(box); }; window.addEventListener(‘scroll’, listener, false); … window.removeEventListener(‘scroll’, listener, false); Mozilla’s docs suggest the same thing.
For console application you can do this, the do while loop runs untill you press x public class Program { public static void Main() { ConsoleKeyInfo keyinfo; do { keyinfo = Console.ReadKey(); Console.WriteLine(keyinfo.Key + ” was pressed”); } while (keyinfo.Key != ConsoleKey.X); } } This will only work if your console application has focus. If … Read more
Since this changes in an event context (points to global usually), you need to store a reference to yourself outside of the event: function Map() { this.x = 0; this.y = 0; var _self = this; $(“body”).mousemove( function(event) { _self.x = event.pageX; // Is now able to access Map’s member variable “x” _self.y = event.pageY; … Read more
WPF gives us a number of different mechanisms for handling events – they are bubbling, tunneling, and direct. These are all known as Routed events. Direct event You are probably already used to the direct routed event. This is where the item itself handles the event that occurred. A good example would be handling he … Read more
Often, event queues are implemented as command design pattern: In object-oriented programming, the command pattern is a design pattern in which an object is used to represent and encapsulate all the information needed to call a method at a later time. This information includes the method name, the object that owns the method and values … Read more