JSFiddle - React, Tailwind, and code Playground

JavaScript

var email = 'ayaz5+any+thing+you+want@gmail.com';

  var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
var matchArray = regex.test(email);
    if(matchArray)
    {
       alert("valid");
    }
    else
    {
        alert("Not a valid e-mail address");
    }