Analysis of the event mechanism in JavaScript-Basic Knowledge-js tutorial

This article mainly introduces the event mechanism in JavaScript, that is, the general interaction between JS and HTML. For more information, see What is an event?

JavaScript interacts with HTML by manipulating events on pages on a user or browser.

When a page is loaded, this is an event. When a user clicks a button, this is an event. Another example of an event is to press any key, close the window, and adjust the window.

Developers can use these events to execute JavaScript encoded responses, which result in buttons to close windows and messages so that they can be displayed to users, data to be verified, and almost any other types of responses can happen.

An event is a 3rd-Level Document Object Model (DOM). A set of HTML elements triggers JavaScript code events.

Example: