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Support for JSX

See original GitHub issue

In the README it mentions that this ever-differently named project supports JSX. In fact it does not. Here’s an example using the default h function:

function Title(message) {
  return h(
    'h1',
    {},
    `Hello, ${message}!`
  )
}
let title = null
title = render(title, Title('Joe'), document.body)

This works as expected. Now if we change this to use JSX:

function Title({message}) {
  return (
    <nav>
      <h1>Hello, {message}!</h1>
    </nav>
  )
}
let title = null
title = render(title, <Title message='Joe' />, document.body)

This does not work. Instead we get an error:

InvalidCharacterError: The string contains invalid characters.

This points to line 48. That because of changes made to the h function. This is because, unlike the h function, a JSX tag returns a function. In Hyperapp, you check for a name of value “function”. In this lib you do not. Currently the h function just returns a vnode:

return {
  name: name,
  attributes: attributes || {},
  children: children,
  key: attributes && attributes.key
}

You could change it to this to restore support for JSX tags:

if (typeof name === 'function') {
  return name(attributes || {}, children)
} else {
  return {
    name: name,
    attributes: attributes || {},
    children: children,
    key: attributes && attributes.key
  }
}