JavaScript querySelector() Method
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JavaScript querySelector() Method
The querySelector() method returns the first element that matches a specified CSS selector(s) in the document. If no matches are found, null is returned.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>P 1</p>
<p>P 2</p>
<p>P 3</p>
<script>
var x = document.querySelector("p");
x.innerHTML = "Hello there!";
</script>
</body>
</html>
Syntax
document.querySelector(selectors)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| selectors | Required | Specifies one or more CSS selectors to match the element. Note: The selector must be a valid CSS syntax, or a SyntaxError exception will occur. |
More Examples
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p class="point">P 1</p>
<p class="point">P 2</p>
<p class="point">P 3</p>
<script>
var x = document.querySelector(".point");
x.innerHTML = "Hello there!";
</script>
</body>
</html>
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p class="point">P 1</p>
<p class="point1">P 2</p>
<p class="point2">P 3</p>
<script>
var x = document.querySelector("p.point1");
x.innerHTML = "Hello there!";
</script>
</body>
</html>
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<div class="div1">
<h2>Heading</h2>
<p>Paragraph</p>
</div>
<div class="div1">
<h2>Heading</h2>
<p>Paragraph</p>
</div>
<script>
var x = document.querySelector(".div1 > p");
x.style.color = "green";
</script>
</body>
</html>
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