l

    function l (type, content, ...attr) {
        // 'Type', 'content' / ['content', l(another)], - [{className: 'className', {id: 'idName'}]
        const r = document.createElement(type);
        attr !== undefined ? attr.forEach(x => {r.setAttribute(Object.keys(x)[0], Object.values(x)[0]);}) : 'pass';
        Array.isArray(content) ? content.forEach(append) : append(content);
        function append(node) {
            typeof node === 'string' ? node = document.createTextNode(node) : 'do nothing';
            r.appendChild(node);
        }
        return r
    }