JavaScript HTML DOM - Changing CSS
The HTML DOM allows JavaScript to change the style of HTML elements.
Changing HTML Style
To change the style of an HTML element, use this syntax:document.getElementById(id).style.property = new styleThe following example changes the style of a <p> element:Example
<html>
<body>
<p id="p2">Hello World!</p>
<script>
document.getElementById("p2").style.color = "blue";
</script>
<p>The paragraph above was changed by a script.</p>
</body>
</html> Using Events
The HTML DOM allows you to execute code when an event occurs.Events are generated by the browser when "things happen" to HTML elements:
- An element is clicked on
- The page has loaded
- Input fields are changed
This example changes the style of the HTML element with id="id1", when the user clicks a button:
Example
<!DOCTYPE html>
<html>
<body>
<h1 id="id1">My Heading 1</h1>
<button type="button"
onclick="document.getElementById('id1').style.color = 'red'">
Click Me!</button>
</body>
</html> 
