JavaScript Code

How to change border of a div in JavaScript?

Tutorials using JS

Problem Statement

change the border of a div element using JavaScript

Solution

to set or change the border of a div element using JavaScript, we can use Element.style.border property. get the div element and set its style.border property with the required border value

divElement.style.border = '2px solid red';

Program

when user clicks on the Click me button, we get the div element with the id myDiv and set its border to 5px solid red using style.border property

<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Tutorial</h1>
<button id="myBtn">Click me</button>
<div id="myDiv">About</div>

<style>
#myDiv {
  width: 100px;
  height: 100px;
  background: yellow;
}
</style>

<script>
document.getElementById("myBtn").addEventListener("click", function() {
    //get the div element
    const myDiv = document.getElementById("myDiv");
    //set the border of the div
    myDiv.style.border = '5px solid red';
});
</script>

</body>
</html>

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