JSFiddle - React, Tailwind, and code Playground

HTML

<form>

<input name="PROPERTY[24][0]" size="25" value="" required="required" type="text">
<input type="submit" />

</form>

JavaScript

var pattern =/\S+@[a-z]+.[a-z]+/;

	$("input[name='PROPERTY[24][0]']").attr("pattern",pattern);