nicer.ts

const append = (a) => (e) => React.createElement(React.Fragment, {}, e, a)
const id = (a) => a
const when = (cond, action) => cond ? action : id

function compose(...args) { }

function nicer(type) {
    return compose(
        when(type === "edit", append(<div></div>)),
        when(false, (e) => <div><span>{e}</span></div>),
        when(true, append(<div></div>)),
    )(base);
}