JavaScript is a lightweight, cross-platform, and interpreted scripting language. It is well-known for the development of web pages, many non-browser environments also use it. JavaScript can be used for Client-side developments as well as Server-side developments.
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”:
Copy the below HTML code into Notepad:
<!DOCTYPE html>
<html>
<body>
<h2>Example of JavaScript</h2>
<p id="test">JavaScript can change HTML content.</p>
<button type="button" onclick="document.getElementById('test').innerHTML = 'Hello World!'"> Click Me </button>
</body>
</html>
Final output will show following result:
Example of JavaScript
JavaScript can change HTML content.