Window matchMedia() Method
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Window matchMedia() Method
❮ Window Object
Example
Find out if the screen/viewport is less than or greater than 700 pixels wide:
if
(window.matchMedia("(max-width: 700px)").matches)
/* The viewport is
less than, or equal to, 700 pixels wide */
else
/* The viewport is greater than 700 pixels wide */
Try it Yourself »
Definition and Usage
The window.matchMedia() method returns a MediaQueryList object representing the results of the specified CSS media query string.
The value of the matchMedia() method can be any of the media features of the CSS @media rule, like min-height, min-width, orientation, etc.
The MediaQueryList object has two properties and two methods:
| Property | Description |
|---|---|
| matches | Used to check the results of a query. Returns a boolean value: true if the document matches the media query list, otherwise false |
| media | A String, representing the serialized media query list |
The first example on this page only runs the specified CSS media query and compares it to the current window state
once. To use window.matchMedia() in a responsive manner, to
make your code react to a CSS media query whenever the window
state changes, you can use its methods/event handlers (See "More Examples"
below):
| Method | Description |
|---|---|
| addListener(functionref) | Adds a new listener function, which is executed whenever the media query's evaluated result changes |
| removeListener(functionref) | Removes a previously added listener function from the media query list. Does nothing if the specified listener is not already in the list |
Browser Support
The numbers in the table specify the first browser version that fully supports the method.
| Method | |||||
|---|---|---|---|---|---|
| matchMedia() | 9.0 | 10.0 | 6.0 | 5.1 | 12.1 |
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Syntax
window.matchMedia(mediaQueryString)Parameter Values
| Parameter | Description |
|---|---|
| mediaQueryString | Required. A string representing the media query for which to return a new MediaQueryList object |
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Technical Details
| Return Value: | A MediaQueryList object representing the results of the specified CSS media query string. |
|---|
More Examples
Example
If the viewport is less than, or equal to, 700 pixels wide, change the
background color to yellow. If it is greater than 700, change it to pink
function myFunction(x)
if (x.matches) // If media
query matches
document.body.style.backgroundColor = "yellow";
else
document.body.style.backgroundColor = "pink";
var x = window.matchMedia("(min-width: 700px)")
myFunction(x) // Call
listener function at run time
x.addListener(myFunction) // Attach listener
function on state changesTry it Yourself »
❮ Window Object
