change background color using javascript onclick code example
Example 1: javascript change background color
document.body.style.backgroundColor = "yellow";
Example 2: change background color on button click in javascript
<style>
.bg1 {
background-color: red;
}
</style>
<button id="btnChangebgColor" />
<script>
$(document).ready(function(){
$("#btnChangebgColor").click(function() {
$(this).addClass(".bg1");
});
}
</script>
Example 3: how to change background color using js
var warning = document.getElementById("warning");
warning.style.background-color = "red";