JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" name="" id="user" onkeypress="keypressEng(event);"/>

CSS

input {
    padding: 5px 8px;
    font-size: 15px;
    outline: none;
    color: #333;
}

JavaScript

function keypressEng(event){
			 var ew = event.which;
		        if(ew == 32)
		            return true;
		        if(65 <= ew && ew <= 90)
		            return true;
		        if(97 <= ew && ew <= 122)
		            return true;
		        return false;
		}