August 2022
Beginner
912 pages
19h 57m
English
Content preview from Coding All-in-One For Dummies, 2nd Edition
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Chapter 11
Using Events in JavaScript
IN THIS CHAPTER
Finding out what’s happenin’
Using event handlers to respond to events
Knowing the types of event handlers
“And now, the sequence of events in no particular order:”
— DAN RATHER
Web pages are much more than just static displays of text and graphics. JavaScript gives web pages interactivity and the ability to perform useful work. An important part of JavaScript’s ability to perform useful functions in the browser is its ability to respond to events.
Knowing Your Events
Events are the things that happen within the browser (such as a page loading) and things the user does (such as clicking, pressing keys on the keyboard, moving the mouse, and so on). Events happen all the time in the browser.
The HTML DOM gives JavaScript the ability to identify and respond to events in a web browser. Events can be divided into groups according to what HTML elements or browser objects they apply to. Table 11-1 lists events that are supported by every HTML element.
TABLE 11-1 Events Supported by All HTML Elements
Event |
Occurs When … |
|---|---|
|
The loading of a file is aborted. |
|
An |
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