Custom events are used for generating graphical components. It can create not only completely new events, but also built-in events such as mousedown, click, and so on. It can be handy for automated testing. Event Constructor Built-in event classes are similar to DOM element classes: they set up a hierarchy. The built-in Event class is the root. Event objects…

As a rule, events automatically bring certain actions, implemented by the browser. For example, clicking a link will initiate navigation to its URL or pressing a mouse button over a text, and moving it will select that text, and so on. Sometimes, while handling events in JavaScript, you don’t want the matching browser action to occur. Instead of…

Bubbling and capturing allows implementing an extremely powerful event handling pattern, known as event delegation. The concept of event delegation is fairly simple, although, it can seem complicated at first sight. The main idea is the following: while having multiple elements handled similarly, you don’t have to assign a handler for each of them. Instead, you…

Among the most used terminology in JavaScript at the time of event flow are bubbling and capturing. In general, the event flow process is completed by the following three concepts: event capturing, event target, and event bubbling. Before starting to explain the concept of bubbling, let’s consider a case. In the example below, the handler is assigned…

Events are considered occurrences or actions, happening in the system you are developing that the latter informs you about so that you can respond to them. In brief, it is a signal that something has happened in your system. All of the DOM nodes generate signals like that ( of course, they are not limited…