JavaScript Introduction
This page contains some examples of what JavaScript can do.
JavaScript Can Change HTML Content
One of many JavaScript HTML methods is getElementById().
The example below "finds" an HTML element (with id="demo"), and changes the element content (innerHTML) to "Hello JavaScript":
JavaScript accepts both double and single quotes:
JavaScript Can Change HTML Attribute Values
In this example JavaScript changes the value of the src (source) attribute of an <img> tag:
JavaScript Can Change HTML Styles (CSS)
Changing the style of an HTML element, is a variant of changing an HTML attribute:
JavaScript Can Hide HTML Elements
Hiding HTML elements can be done by changing the display style:
JavaScript Can Show HTML Elements
Showing hidden HTML elements can also be done by changing the display style:
Did You Know?
JavaScript and Java are completely different languages, both in concept and design.
JavaScript was invented by Brendan Eich in 1995, and became an ECMA standard in 1997.
ECMA-262 is the official name of the standard. ECMAScript is the official name of the language.
DevCrib is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using DevCrib, you agree to have read and accepted our terms of use, cookie and privacy policy.
Copyright 2022 by Michael Okwuosah. All Rights Reserved.
