JSFiddle - React, Tailwind, and code Playground
HTML
<input type="text" id="foo" maxlength="10">
JavaScript
var el = document.getElementById('foo'),
attrs = el.attributes,
length = attrs['maxlength'].value;
alert(length);
<input type="text" id="foo" maxlength="10">
var el = document.getElementById('foo'),
attrs = el.attributes,
length = attrs['maxlength'].value;
alert(length);