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alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundColor backgroundImage backgroundPosition backgroundRepeat backgroundClip backgroundOrigin backgroundSize backfaceVisibility border borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage borderImageOutset borderImageRepeat borderImageSlice borderImageSource borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth borderRadius borderRight borderRightColor borderRightStyle borderRightWidth borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow boxSizing captionSide clear clip color columnCount columnFill columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns columnSpan columnWidth counterIncrement counterReset cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap cssFloat font fontFamily fontSize fontStyle fontVariant fontWeight fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight listStyle listStyleImage listStylePosition listStyleType margin marginBottom marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit objectPosition opacity order orphans outline outlineColor outlineOffset outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore pageBreakInside perspective perspectiveOrigin position quotes resize right tableLayout tabSize textAlign textAlignLast textDecoration textDecorationColor textDecorationLine textDecorationStyle textIndent textOverflow textShadow textTransform top transform transformOrigin transformStyle transition transitionProperty transitionDuration transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign visibility width wordBreak wordSpacing wordWrap widows zIndex
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Other References

CSSStyleDeclaration JS Conversion


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.


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