poor's man javascript html validator

htmlValidator.js

// Poor's man html Validator.
// https://gist.github.com/orlando/6251395
function validateHtml (htmlString) {
    var htmlString, divElm, docFrag, docFragHtml;
    htmlString = htmlString.replace(/ +/g, " ").toLowerCase();
    htmlString = htmlString.replace(/\s*\/\s*>/g, ">");
    divElm = document.createElement('div');
    docFrag = document.createDocumentFragment();
    docFrag.appendChild(divElm);
    docFrag.querySelector('div').innerHTML = htmlString;
    docFragHtml = docFrag.querySelector('div').innerHTML;
    docFragHtml = docFragHtml.replace(/'/g, '"');
    htmlString = htmlString.replace(/'/g, '"');
 
    if (docFragHtml === htmlString) {
        console.log("valid")
    } else {
        console.log("invalid")
    }
}