hello

HTML

<input class="st-no-arabic" type="text" >

JavaScript

jQuery(".st-no-arabic").on("input", function () {
		var inputValue = jQuery(this).val();
		var validChars = /^.*[\u0600-\u06FF\s]+.*$/;
		if (validChars.test(inputValue)) 
		{
			alert('arabic text is not allowed');
			jQuery(this).val('');
		}
	});