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HTML DOM querySelector() Method
The HTML DOM querySelector() method returns the first element that matches a specific CSS selector specified in its parameter in an HTML document.
Syntax
Following is the syntax −
document.querySelector(“CSS Selector”);
Example
Let us see an example of querySelector() method −
<!DOCTYPE html>
<html>
<head>
<style>
html{
height:100%;
}
body{
text-align:center;
color:#fff;
background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat;
height:100%;
}
.drop-down{
width:35%;
border:2px solid #fff;
font-weight:bold;
padding:8px;
}
.btn{
background:#0197F6;
border:none;
height:2rem;
border-radius:2px;
width:35%;
margin:2rem auto;
display:block;
color:#fff;
outline:none;
cursor:pointer;
}
.show{
font-size:1.5rem;
font-weight:bold;
}
</style>
</head>
<body>
<h1>DOM querySelector() Method Demo</h1>
<p class="awesome-para">Hi! I'm a paragraph with some random text.</p>
<button onclick="changeColor()" class="btn">Change p styles</button>
<script>
function changeColor() {
var paraElement = document.querySelector(".awesome-para");
paraElement.style.color="#db133a";
paraElement.style.fontSize="1.2rem";
}
</script>
</body>
</html>Output
This will produce the following output −
_Method.jpg)
Click on “blue” button to change the styles of para element.
_Method_ex.jpg)
Updated on: 30-Jul-2019
199 Views
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