function h()

h.js

function h() {
    const sel = arguments[0];
    const tag = sel.match(/^[^\.#]+/)[0].trim();
    // WONTFIX: i should handle tag === '', but instead i'll just avoid
    // doing that, ha ha
    const e = document.createElement(tag);
    let classes = sel.match(/\.[^\.#]+/g);
    if (classes != null) {
        classes = classes.map((c) => c.slice(1));
        e.classList.add(...classes);
    }
    const id = sel.match(/\#[^\.#]+/g);
    if (id !== null) {
        e.id = id[0];
    }

    const options = arguments[1];
    if (options != null) {
        if (typeof options === 'object' && Object.getPrototypeOf(options) === Object.prototype) {
            Object.entries(options).forEach((pair) => {
                const [key, value] = pair;
                e.setAttribute(key, value);
            });
        } else {
            e.append(options);
        }
    }
    const children = Array.from(arguments).slice(2);
    e.append(...children);
    return e;
}