parse-tag.js

var attrRE = /([\w-]+)|=|(['"])([.\s\S]*?)\2/g;
var voidElements = require('void-elements');

module.exports = function (tag) {
    var i = 0;
    var key;
    var expectingValueAfterEquals = true;
    var res = {
        type: 'tag',
        name: '',
        voidElement: false,
        attrs: {},
        children: []
    };

    tag.replace(attrRE, function (match) {
        if (match === '=') {
            expectingValueAfterEquals = true;
            i++;
            return;
        }

        if (!expectingValueAfterEquals) {
            if (key) {
                res.attrs[key] = key; // boolean attribute
            }
            key=match;
        } else {
            if (i === 0) {
                if (voidElements[match] || tag.charAt(tag.length - 2) === '/') {
                    res.voidElement = true;
                }
                res.name = match;
            } else {
                res.attrs[key] = match; // .replace(/^['"]|['"]$/g, '');
                key=undefined;
            }
        }
        i++;
        expectingValueAfterEquals = false;
    });

    return res;
};