Add Fiber Debugger #8033
Add Fiber Debugger #8033
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This lets us consume it from the debugger.
| @@ -61,219 +62,231 @@ function flattenChildren(children : HostChildren<Instance | TextInstance>) { | |||
| return flatArray; | |||
| } | |||
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| var NoopRenderer = ReactFiberReconciler({ | |||
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These are just indentation changes + pass options.debugTool through to the reconciler.
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This comment is meant to be an alternative, and preferred, solution instead of the other comments.
The most important thing to me is that we can easily strip this out today because I don't want to have to skip through and worry about this when we micro-optimize.
It is also important that we don't expose this to the public renderer API so that others don't start building devtools with it, or that we start building public devtools that rely on the fiber structure.
It seems to me that the use of this tool means that you're inside the React debugging environment and therefore you have access to your own build.
So you can just create a global devtool module that can get a dynamic injection from anywhere. Just like ReactInstrumentation/ReactDebugTool does.
Then you hide that behind a __DEV__ or __REACT_DEV__ flag that we can filter out so it doesn't get packaged.
That way you don't have to expose a custom constructor for each renderer to invoke this. You don't have to pass it around anyway. You can just require it globally and the tool can just attach to the instrumentation.
| scheduleDeferredCallback(callback : (deadline : Deadline) => void) : void | ||
| scheduleDeferredCallback(callback : (deadline : Deadline) => void) : void, | ||
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| debugTool : DebugTool | null, |
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I don't think the debug tool should be part of the host environment since we can use this with any host environment.
Adding things to this API should come with a very high bar since it makes it difficult to implement new renderers and it create a permanent type that we have to support.
It would be better if you passed this as a separate argument, separate from HostConfig.
E.g. just pass it as debugTool parallel to config in the places you need it.
| } else { | ||
| // Otherwise, complete the current work. | ||
| return completeUnitOfWork(workInProgress); | ||
| if (debugTool) { |
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We should wrap all of these in __DEV__ before we have the infrastructure in place to statically DCE them.
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@sebmarkbage Addressed. |
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ok! |
* Build react-noop as a package This lets us consume it from the debugger. * Add instrumentation to Fiber * Check in Fiber Debugger
Fiber Debugger
This is a debugger handy for visualizing how Fiber works internally.
It is only meant to be used by React contributors, and not by React users.
It is likely that it might get broken at some point. If it's broken, ping Dan.
Running
First,
npm run buildin React root repo folder.Then
npm installandnpm startin this folder.Open
http://localhost:3000in Chrome.Features
ReactNooprenderer