set css property in javascript code example

Example 1: how to change style of an element using javascript

<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>

Example 2: access css property using javascript

const element = document.querySelector('.element')
const style = getComputedStyle(element)

Example 3: style through javascript

element.style.backgroundColor = "red";   // set the background color of an element to red