HTML DOM querySelectorAll() Method
Document ObjectExample
Get all elements in the document with class="example":
var x =
document.querySelectorAll(".example");
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More "Try it Yourself" examples below.
Definition and Usage
The querySelectorAll() method returns all elements in the document that matches a specified CSS selector(s), as a static NodeList object.
The NodeList object represents a collection of nodes. The nodes can be accessed by index numbers. The index starts at 0.
Tip: You can use the length property of the NodeList object to determine the number of elements that matches the specified selector, then you can loop through all elements and extract the info you want.
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 | |||||
|---|---|---|---|---|---|
| querySelectorAll() | 4.0 | 9.0 | 3.5 | 3.2 | 10.0 |
Note: Internet Explorer 8 has support for CSS2 selectors. IE9 and later versions have support for CSS3 as well.
Syntax
document.querySelectorAll(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. Tip: For a list of all CSS Selectors, look at our CSS Selectors Reference. |
Technical Details
| DOM Version: | Selectors Level 1 Document Object |
|---|---|
| Return Value: | A NodeList object, representing all elements in the document that matches the specified CSS selector(s). The NodeList is a static collection, meaning that changes in the DOM has NO effect in the collection. Throws a SYNTAX_ERR exception if the selector(s) is invalid |
More Examples
Example
Get all <p> elements in the document, and set the background color of the first <p> element (index 0):
// Get all <p> elements in the document
var x =
document.querySelectorAll("p");
// Set the
background color of the first <p> element
x[0].style.backgroundColor = "red";
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Example
Get all <p> elements in the document with class="example", and set the background of the first <p> element:
// Get all <p> elements in the document with class="example"
var x =
document.querySelectorAll("p.example");
// Set the
background color of the first <p> element with class="example" (index
0)
x[0].style.backgroundColor = "red";
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Example
Find out how many elements with class="example" there are in the document (using the length property of the NodeList object):
var x =
document.querySelectorAll(".example").length;
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Example
Set the background color of all elements in the document with class="example":
var x = document.querySelectorAll(".example");
var i;
for (i = 0;
i < x.length; i++) {
x[i].style.backgroundColor =
"red";
}
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Example
Set the background color of all <p> elements in the document:
var x = document.querySelectorAll("p");
var i;
for (i = 0;
i < x.length; i++) {
x[i].style.backgroundColor =
"red";
}
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Example
Set the border of all <a> elements in the document that have a "target" attribute:
var x = document.querySelectorAll("a[target]");
var i;
for (i = 0;
i < x.length; i++) {
x[i].style.border = "10px solid red";
}
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Example
Set the background color of every <p> element where the parent is a <div> element:
var x = document.querySelectorAll("div > p");
var i;
for (i = 0;
i < x.length; i++) {
x[i].style.backgroundColor =
"red";
}
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Example
Set the background color of all <h2>, <div> and <span> elements in the document:
var x = document.querySelectorAll("h2, div, span");
var i;
for (i = 0;
i < x.length; i++) {
x[i].style.backgroundColor =
"red";
}
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Related Pages
CSS Tutorial: CSS Selectors
CSS Reference: CSS Selectors Reference
JavaScript Tutorial: JavaScript HTML DOM Node List
HTML DOM Reference: document.querySelector()
HTML DOM Reference: element.querySelectorAll()
