Preact X useId alternative

[JoviDeCroock]

Currently to the thought of a prefix tree this would be an alternative to useId. This tries to follow our component tree and has a mask variable.

Mount

Every time we encounter a component a long the way we will set vnode._mask to the global counter we are following, this means that every node that can generate an id will have a unique mask. When we invoke useId we will look at the localIdCounter (reset for every component we see) this with the combination of our prefix will ensure that we generate a consistent id even if we are invoking multiple useId calls.

Mounting a new subtree

When we see a new subtree we will look at the parentMask and count from there, this however means that we could cause conflicts, ideally we would need to keep incrementing mask. If we can find a way to reset the mask counter for SSR environments we would bypass this.

Notes

• We need to add _children and _parent to render to string
• We can optimize subsequent client-side renders by using a counter that increments after hydration

Going to wait for an OK before I get started on the RTS work

[github-actions[bot]]

Size Change: +463 B (0%)

Total Size: 52.8 kB

Filename	Size	Change
compat/dist/compat.js	3.78 kB	+7 B (0%)
compat/dist/compat.module.js	3.72 kB	+11 B (0%)
compat/dist/compat.umd.js	3.85 kB	+5 B (0%)
hooks/dist/hooks.js	1.55 kB	+151 B (9%)	🔍
hooks/dist/hooks.module.js	1.57 kB	+141 B (8%)	🔍
hooks/dist/hooks.umd.js	1.63 kB	+148 B (9%)	🔍

ℹ️ View Unchanged

Filename	Size	Change
debug/dist/debug.js	3.01 kB	0 B
debug/dist/debug.module.js	3.01 kB	0 B
debug/dist/debug.umd.js	3.09 kB	0 B
devtools/dist/devtools.js	231 B	0 B
devtools/dist/devtools.module.js	240 B	0 B
devtools/dist/devtools.umd.js	315 B	0 B
dist/preact.js	4.01 kB	0 B
dist/preact.min.js	4.04 kB	0 B
dist/preact.min.module.js	4.04 kB	0 B
dist/preact.min.umd.js	4.07 kB	0 B
dist/preact.module.js	4.03 kB	0 B
dist/preact.umd.js	4.08 kB	0 B
jsx-runtime/dist/jsxRuntime.js	358 B	0 B
jsx-runtime/dist/jsxRuntime.module.js	324 B	0 B
jsx-runtime/dist/jsxRuntime.umd.js	439 B	0 B
test-utils/dist/testUtils.js	442 B	0 B
test-utils/dist/testUtils.module.js	444 B	0 B
test-utils/dist/testUtils.umd.js	526 B	0 B

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[coveralls]

Coverage increased (+0.005%) to 99.527% when pulling 1aad6d8066c5c9c0bcab5d3c8c20c1bf2eaf8cdc on use-id-alternative into 1427d58fb43f8b42013b340cbff0cfc72ca52d0e on master.

[mjgerace]

Any movement on this?

[developit]

@mjgerace I believe Jovi has a PR Open in render-to-string to add the necessary links for this.

[itsbjoern]

Hi just to let you know I checked out this and the PR on render-to-string (https://github.com/preactjs/preact-render-to-string/pull/226)

In my setup this line breaks: https://github.com/preactjs/preact/blob/186f5da5c8965fccd2760bacf76d7d75e8769d53/hooks/src/index.js#L36-L39

This is because indexOf is not defined on vnode._parent._children, I investigated this and it seems like _children is a rendered preact object rather than a list. In my case I fixed it by just making the line:

const position = vnode._parent &&
    vnode._parent._children &&
    vnode._parent._children !== vnode &&
    vnode._parent._children.indexOf

I realise this is quite hacky (and probably doesn't do what I actually want it to) but at least it doesn't crash anymore. I have basically no knowledge of this project and just needed stuff to work.

[JoviDeCroock]

You mean it breaks on the client or during SSR, if it breaks on the client that might be expected I haven't gone through all cases yet.

As mentioned this is in no way a done thing 😅

[itsbjoern]

It breaks during the render call of render-to-string.

[itsbjoern]

The more I think about it, given the scuffed setup I'm using it is very possible that the fault is actually somewhere on my end ...

[JoviDeCroock]

@developit had an alternative that had a better byte-size impact

[mjgerace]

Is this okay to merge?

[Wallacy]

Any news here?

[marvinhagemeister]

Let's merge this 👍

[PodaruDragos]

will there be a new release soon that integrates this ?

[marvinhagemeister]

@PodaruDragos I definitely share your excitement about useId! We merged this PR just two days ago and it was the weekend. We maintainers need some time to recharge and relax too :)

[PodaruDragos]

@marvinhagemeister my apologies for sounding demanding, yeah I am really waiting for this for a long time. Thanks for this feature and thanks for all the good work you guys are doing on this project.

[Aloento]

When will the new version be released?