Use the HTML5 CheckValidity API from jQuery

A jQuery plugin to use the HTML5 CheckValidity API from jQuery. Just:

npm install jquery-html5-validity

Then:

var $ = require('jquery')
require("jquery-html5-validity")($);

then you can run:

$('.some-class').isValid()

true

You can also:

$('.some-class').setCustomValidity(reason)

Where 'reason' is either a String or null / false (to say something is valid).