Intro

Media queries let you adapt your site or app depending on the presence or value of various device characteristics and parameters.

They are a key component of responsive design. For example, a media query can shrink the font size on small devices, increase the padding between paragraphs when a page is viewed in portrait mode, or bump up the size of buttons on touchscreens.

In CSS, use the @media at-rule to conditionally apply part of a style sheet based on the result of a media query. Use @import to conditionally apply an entire style sheet.

Media queries in HTML

In HTML, media queries can be applied to various elements:

• In the <link> element’s media attribute, they define the media to which a linked resource (typically CSS) should be applied.
• In the <source> element’s media attribute, they define the media to which that source should be applied. (This is only valid inside <picture> elements.)
• In the <style> element’s media attribute, they define the media to which the style should be applied.

Media queries in JavaScript

In JavaScript, you can use the Window.matchMedia() method to test the window against a media query. You can also use MediaQueryList.addListener() to be notified whenever the state of a query changes. With this functionality, your site or app can respond to changes in the device configuration, orientation, or state.

You can learn more about programmatically using media queries in Testing media queries.

srcs developer.mozilla.org


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