JSFiddle - React, Tailwind, and code Playground

by thecoz21

HTML

<form>
Password: <input type="password" name="password" required><br/>
Ripeti password: <input type="password" name="ripeti_password"><br/>
<input type="submit" id="submit" value="invia">
</form>

JavaScript

var i1 = document.querySelector('input[name=password]'),
    su = document.querySelector('#submit'),
    i2 = document.querySelector('input[name=ripeti_password]');

su.addEventListener('click', function(){
        if(i1.value != i2.value){
        i1.setCustomValidity('Le password non coincidono');
                    }else{
                    i1.setCustomValidity('');
                        }
}, false);