How to validate mail adress css

<form>
	<input pattern="/^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/" required />
	<br />
	<input type="submit" value="Submit Now!">
</form>

Source: html5-tutorial.net

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