HTML DOM querySelector() Method
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HTML DOM querySelector() Method
❮ Document Object
Example
Get the first element in the document with class="example":
document.querySelector(".example");Try it Yourself »
More "Try it Yourself" examples below.
Definition and Usage
The querySelector() method returns the first element that matches a specified
CSS selector(s) in the document.
Note: The querySelector() method only returns the first
element that matches the specified selectors. To return all the matches, use the
querySelectorAll() method instead.
If the selector matches an ID in document that is used several times (Note
that an "id" should be unique within a page and should not be used more than once),
it returns the first matching element.
For more information about CSS Selectors, visit our
CSS Selectors Tutorial and our
CSS Selectors Reference.
Browser Support
The numbers in the table specifies the first browser version that fully
supports the method.
| Method | |||||
|---|---|---|---|---|---|
| querySelector() | 4.0 | 8.0 | 3.5 | 3.2 | 10.0 |
Syntax
document.querySelector(CSS selectors)Parameter Values
| Parameter | Type | Description |
|---|---|---|
| CSS selectors | String | Required. Specifies one or more CSS selectors to match the element. These are used to select HTML elements based on their id, classes, types, attributes, values of attributes, etc. For multiple selectors, separate each selector with a comma. The returned element depends on which element that is first found in the document (See "More Examples"). Tip: For a list of all CSS Selectors, look at our CSS Selectors Reference. |
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Technical Details
| DOM Version: | Selectors Level 1 Document Object |
|---|---|
| Return Value: | A NodeList object, representing the first element that matches the specified CSS selector(s). If no matches are found, null is returned. Throws a SYNTAX_ERR exception if the specified selector(s) is invalid. |
More Examples
Example
Get the first <p> element in the document:
document.querySelector("p");Try it Yourself »
Example
Get the first <p> element in the document with class="example":
document.querySelector("p.example");Try it Yourself »
Example
Change the text of an element with id="demo":
document.querySelector("#demo").innerHTML = "Hello World!";
Try it Yourself »
Example
Get the first <p> element in the document where the parent is a <div>
element.
document.querySelector("div > p");Try it Yourself »
Example
Get the first <a> element in the document that has a "target" attribute:
document.querySelector("a[target]");Try it Yourself »
Example
This example demonstrates how multiple selectors work.
Assume that you have two elements: a <h2> and a <h3> element.
The following code will add a background color to the first <h2> element in the document:
<h2>A h2 element</h2>
<h3>A h3 element</h3>
document.querySelector("h2, h3").style.backgroundColor = "red";Try it Yourself »
However, if the <h3> element was placed before the <h2> element in the document. The <h3> element is the one that will get the red background color.
<h3>A h3 element</h3>
<h2>A h2 element</h2>
document.querySelector("h2, h3").style.backgroundColor = "red";Try it Yourself »
Related Pages
CSS Tutorial: CSS Selectors
CSS Reference: CSS Selectors Reference
JavaScript Tutorial: JavaScript HTML DOM Node List
JavaScript Reference: element.querySelector()
HTML DOM Reference: document.querySelectorAll()
JavaScript Reference: element.querySelectorAll()
❮ Document Object
