- JavaScript Basics
- JavaScript Home
- JavaScript Syntax
- JavaScript Placements
- JavaScript Output
- JavaScript Statements
- JavaScript Keywords
- JavaScript Comments
- JavaScript Variables
- JavaScript var
- JavaScript let
- JavaScript const
- JavaScript var Vs let Vs const
- JavaScript Operators
- JavaScript Arithmetic Operators
- JavaScript Assignment Operators
- JS Comparison Operators
- JavaScript Logical Operators
- JavaScript Bitwise Operators
- JavaScript Ternary Operator
- JavaScript Operator Precedence
- JavaScript Data Types
- JavaScript typeof Operator
- JS Conditional Statements
- JavaScript Conditional Statement
- JavaScript if Statement
- JavaScript if...else Statement
- JavaScript switch Statement
- JavaScript Loops
- JavaScript for Loop
- JavaScript while Loop
- JavaScript do...while Loop
- JavaScript break Statement
- JavaScript continue Statement
- JavaScript break Vs. continue
- JavaScript Popup Boxes
- JavaScript Dialog Box
- JavaScript alert Box
- JavaScript confirm Box
- JavaScript prompt Box
- JavaScript Functions
- JavaScript Functions
- JS Function with Parameter
- JavaScript Return Statement
- JavaScript Variable Scope
- JavaScript setTimeout() Method
- JavaScript setInterval() Method
- JavaScript Events
- JavaScript Events
- JavaScript onclick Event
- JavaScript onload Event
- JavaScript Mouse Events
- JavaScript onreset Event
- JavaScript onsubmit Event
- JavaScript Objects
- JavaScript Objects
- JavaScript Number Object
- JavaScript Array Object
- JavaScript String Object
- JavaScript Boolean Object
- JavaScript Math Object
- JavaScript RegExp Object
- JavaScript Date Object
- JavaScript Browser Objects
- JavaScript Browser Objects
- JavaScript Window Object
- JavaScript Navigator Object
- JavaScript History Object
- JavaScript Screen Object
- JavaScript Location Object
- JavaScript Document Object
- JS Document Object Collection
- JS Document Object Properties
- JS Document Object Methods
- JS Document Object with Forms
- JavaScript DOM
- JavaScript DOM
- JavaScript DOM Nodes
- JavaScript DOM Levels
- JavaScript DOM Interfaces
- JavaScript Cookies
- JavaScript Cookies
- JavaScript Create/Delete Cookies
- JavaScript Advance
- JavaScript Regular Expression
- JavaScript Page Redirection
- JavaScript Form Validation
- JavaScript Validations
- JavaScript Error Handling
- JavaScript Exception Handling
- JavaScript try-catch throw finally
- JavaScript onerror Event
- JavaScript Multimedia
- JavaScript Animation
- JavaScript Image Map
- JavaScript Debugging
- JavaScript Browser Detection
- JavaScript Security
- JavaScript Misc
- JavaScript innerHTML
- JavaScript getElementById()
- JS getElementsByClassName()
- JS getElementsByName()
- JS getElementsByTagName()
- JavaScript querySelector()
- JavaScript querySelectorAll()
- JavaScript document.write()
- JavaScript console.log()
- JavaScript instanceof
- JavaScript Programs
- JavaScript Programs
- JavaScript Test
- JavaScript Online Test
- Give Online Test
- All Test List
JavaScript document.querySelector()
The JavaScript querySelector() method is used to select the first element with specified CSS selector. For example:
HTML with JavaScript Code
<!DOCTYPE html> <html> <body> <p>This is para one</p> <p class="redPara">This is para two</p> <p>This is para three</p> <p>This is para four</p> <p class="redPara">This is para five</p> <script> document.querySelector(".redPara").style.color = "red"; </script> </body> </html>
Output
This is para one
This is para two
This is para three
This is para four
This is para five
See, the first element with specified class name, that is redPara, was returned. And I've changed the style of that element.
Note - There are multiple ways to select an element, using CSS selectors. The details are described in its separate tutorial.
JavaScript querySelector() Syntax
The syntax of querySelector() method in JavaScript, is:
document.querySelector(x)
The x refers to a CSS selector. If no match found, null is returned.
« Previous Tutorial Next Tutorial »