Why are v.attrs passed to oninit() for a child component an empty object? about mithril.js HOT 5 CLOSED

As far as I can tell, the attrs and state that you're passing from Parent to Option might be the unaltered vnode ones that have been passed to the Parent, and I'm assuming initParentState is changing the Parent state, and not the vnode.state. I'm guessing you want to achieve something like this (sorry, it's in hyperscript, not JSX)?

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Thanks, Oscar!

I have a clue: the problem is the spread operator. Could be spreading multiple objects or perhaps doing that in jsx. (Note that spreading a single object works just fine.) Either way, I tried every combination of spread I could think of without success. I figured out a reasonable way that doesn't involve spreading and that is now working.

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I don't know how embarrassed I should feel, but I think I just discovered that "tag" is a reserved attribute name in mithril. I was passing a tag attribute. Doh!

Is there a way to flag that?

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Will close. Would love to see this flagged during runtime though.

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Will close. Would love to see this flagged during runtime though.

Unfortunately, it's basically impossible, since in the locations where it could be special, we have no knowledge of whether it's a vnode or attributes object.

If in doubt, use m.censor. It's not yet immediately visible in the main docs, but that I believe is fixed in next and will show the next time the docs are updated.

We do make sure that if you provide us a non-vnode when only a vnode is accepted, you will be able to spot the error. But unfortunately, Mithril doesn't know the context in which it's called, so it can't tell apart attributes from child vnodes.

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