Create a DOM document from string, without JQuery

Question

We\'re looking for ways to create a DOM document in javascript from a string, but without using Jquery. Is there a way to do so? [I would assume so, since J

Answer 1

I tried some of the other ways here but there where issues when creating script elements such as Chrome refusing to load the actual .js file pointed to by the src attribute. Below is what works best for me.

It's up to 3x faster than jQuery and 3.5x faster than using DOMParser, but 2x slower than programmatically creating the element.
https://www.measurethat.net/Benchmarks/Show/2149/0

Object.defineProperty(HTMLElement, 'From', { 
    enumerable: false,
    value: (function (document) {
        //https://www.measurethat.net/Benchmarks/Show/2149/0/element-creation-speed
        var rgx = /(\S+)=(["'])(.*?)(?:\2)|(\w+)/g;
        return function CreateElementFromHTML(html) {
            html = html.trim();
            var bodystart = html.indexOf('>') + 1, bodyend = html.lastIndexOf('<');
            var elemStart = html.substr(0, bodystart);
            var innerHTML = html.substr(bodystart, bodyend - bodystart);
            rgx.lastIndex = 0;
            var elem = document.createElement(rgx.exec(elemStart)[4]);
            var match; while ((match = rgx.exec(elemStart))) {
                if (match[1] === undefined) {
                    elem.setAttribute(match[4], "");
                } else {
                    elem.setAttribute(match[1], match[3]);
                }
            }
            elem.innerHTML = innerHTML;
            return elem;
        };
    }(window.document))
});

Usage Examples:

HTMLElement.From(`
`);
HTMLElement.From(``);
HTMLElement.From(``);
HTMLElement.From(``);
HTMLElement.From(`
`);