After rendering a pretty simple app the result is
<body>
<div id="root"><undefined></undefined></div>
</body>
There are no errors in the console.
I am new to hyperapp, so it seems pretty likely I missed something. If this does turn out to be something simple I would still expect there to be an error in the console.
kyeotic
All 9 comments
It is not supported for top-level components to return arrays.
See #362.
infinnie
on 2 May 2018
@tyrsius Your application requires a root element; you can't return an array from the top level view.
To correct your example you may do:
const App = ({ orders }) => {
return h("main", { class: "root" }, orders.map(order => h(OrderItem, { order })))
}
I would still expect there to be an error in the console.
This is a reasonable feature request. Currently I am not offering a "dev" build for Hyperapp, but it has been proposed before and I would be happy to discuss how we could offer one.
jorgebucaran
on 2 May 2018
But will arrays ever be supported as values returned by top-level components? Or will they be in version 2.0?
infinnie
on 2 May 2018
@jorgebucaran @infinnie oh man, these docs on the front page sure make it seem like you can
kyeotic
on 2 May 2018
@tyrsius Components can be arrays, but views can't. In your example, App is the view so it can't be an array.
jorgebucaran
on 2 May 2018
@infinnie ...will they be in version 2.0?
Later.
But will arrays ever be supported as values returned by top-level components?
Yes, eventually. I want to add proper document fragment at some point, but it's not a pressing priority at the moment.
About the specific case of returning arrays from the top-level view: remember that unlike e.g., React/Preact, a Hyperapp app consists of a single top-level view/component always.
jorgebucaran
on 2 May 2018
@jorgebucaran Thank you for explaining the difference 馃槃
kyeotic
on 2 May 2018
I do still think logging an error in this case is a good idea. Outputting <undefined></undefined> with no error doesn't make debugging very... possible.
kyeotic
on 2 May 2018
jorgebucaran
on 2 May 2018
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Most helpful comment
Later.
Yes, eventually. I want to add proper document fragment at some point, but it's not a pressing priority at the moment.
About the specific case of returning arrays from the top-level view: remember that unlike e.g., React/Preact, a Hyperapp app consists of a single top-level view/component always.