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<script src="https://unpkg.com/[email protected]"></script>

JavaScript

if (window.matchMedia('(max-device-width: 550px)').matches) {
	alert('yes')
} else {
	alert('no')
}

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Fiddle collections

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Private collections and fiddles

You can make as many Private Fiddles, and Private Collections as you wish!
Console

Debug your Fiddle with a minimal built-in JavaScript console.

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