What is a Media Query?
Media query is a CSS technique introduced in CSS3.
It uses the
@media rule to include a block of CSS properties only if a certain condition is true.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body {
background-color: lightgreen;
}
@media only screen and (max-width: 500px) {
body {
background-color: lightblue;
}
}
</style>
</head>
<body>
<p>Resize the browser window. When the width of this document is less than 500 pixels, the background-color is "lightblue", otherwise it is "lightgreen".</p>
</body>
</html>
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