Difference between e.target and e.currentTarget
e.target is what triggers the event dispatcher to trigger and e.currentTarget is what you assigned your listener to.
events
How to stop event propagation with inline onclick attribute?
Use event.stopPropagation(). <span onclick=”event.stopPropagation(); alert(‘you clicked inside the header’);”>something inside the header</span> For IE: window.event.cancelBubble = true <span onclick=”window.event.cancelBubble = true; alert(‘you clicked inside the header’);”>something inside the header</span>
Understanding events and event handlers in C#
To understand event handlers, you need to understand delegates. In C#, you can think of a delegate as a pointer (or a reference) to a method. This is useful because the pointer can be passed around as a value. The central concept of a delegate is its signature, or shape. That is (1) the return … Read more
What are the differences between delegates and events?
An Event declaration adds a layer of abstraction and protection on the delegate instance. This protection prevents clients of the delegate from resetting the delegate and its invocation list and only allows adding or removing targets from the invocation list.
Pass mouse events through absolutely-positioned element
pointer-events: none; Is a CSS property that makes events “pass through” the HTML-element to which the property is applied. It makes the event occur on the element “below”. See for details: https://developer.mozilla.org/en-US/docs/Web/CSS/pointer-events It is supported by almost all browsers, including IE11; global support was ~98.2% in 05/’21): http://caniuse.com/#feat=pointer-events (thanks to @s4y for providing the link … Read more
How to trigger the window resize event in JavaScript?
window.dispatchEvent(new Event(‘resize’));
How to remove all event handlers from an event
I found a solution on the MSDN forums. The sample code below will remove all Click events from button1. public partial class Form1 : Form { public Form1() { InitializeComponent(); button1.Click += button1_Click; button1.Click += button1_Click2; button2.Click += button2_Click; } private void button1_Click(object sender, EventArgs e) => MessageBox.Show(“Hello”); private void button1_Click2(object sender, EventArgs e) => … Read more
Android Spinner: Get the selected item change event
Some of the previous answers are not correct. They work for other widgets and views, but the documentation for the Spinner widget clearly states: A spinner does not support item click events. Calling this method will raise an exception. Better use OnItemSelectedListener() instead: spinner.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, … Read more
Watch multiple $scope attributes
Starting from AngularJS 1.3 there’s a new method called $watchGroup for observing a set of expressions. $scope.foo = ‘foo’; $scope.bar=”bar”; $scope.$watchGroup([‘foo’, ‘bar’], function(newValues, oldValues, scope) { // newValues array contains the current values of the watch expressions // with the indexes matching those of the watchExpression array // i.e. // newValues[0] -> $scope.foo // and … Read more
jQuery same click event for multiple elements
$(‘.class1, .class2’).on(‘click’, some_function); Or: $(‘.class1’).add(‘.class2’).on(‘click’, some_function); This also works with existing objects: const $class1 = $(‘.class1’); const $class2 = $(‘.class2’); $class1.add($class2).on(‘click’, some_function);