JSFiddle - React, Tailwind, and code Playground

HTML

<div id="result1"></div>
<div id="result2"></div>

JavaScript

var re= new RegExp(/^\S+[-_.]*@\S+([-_]?\S+)*\.([-_]?\S)+(\.?\S+)*$/);                             
                                                                                                                        
if(re.test('[email protected]')){
    document.getElementById('result1').innerHTML ='yes';
}else{
    document.getElementById('result1').innerHTML = 'no';
}

if(re.test('[email protected]')){
    document.getElementById('result2').innerHTML ='yes';
}else{
    document.getElementById('result2').innerHTML = 'no';
}