With proper indenting and similar formatting:

React:

    const links = ctrl.pages().map(page => <a href={page.url}>{page.title}</a>);

    return <div> {links} <button onClick={ctrl.rotate}> Rotate Links </button> </div>;

Mithril:

    const links = ctrl.pages().map(page => m("a", {href: page.url}, page.title));

    return m("div", [links, m("button", {onclick: ctrl.rotate}, "Rotate links")]);

There are JSX equivalents for Mithril too (for both Babel and standalone JSX).

Mithril templates look also very good in CoffeeScript and similar languages.