CODE EXAMPLE FOR CSS

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>