Check if HTML snippet is valid with Javascript

Question

I need a reliable Javascript library / function to check if a HTML snippet is valid that I can call from my code. For example, it should check that opened tags and quotation

Answer 1

Well, this code:

function tidy(html) {
    var d = document.createElement('div');
    d.innerHTML = html;
    return d.innerHTML;
}

This will "correct" malformed HTML to the best of the browser's ability. If that's helpful to you, it's a lot easier than trying to validate HTML.