JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <div>
        <label for="name">Name :</label>
        <input type="text" name="name">
    </div>
    <div>
        <label for="email">E-Mail :</label>
        <input type="email" name="email">
    </div>
</form>

JavaScript

var el = document.getElementsByTagName('input');

for(var i =0; i< el.length;i++){
console.log(el[i]);
console.log(el[i].previousElementSibling);
if(el[i].getAttribute("name")==el[i].previousElementSibling.getAttribute("for")){
console.log("it is label");
}
}