Don't use Spread in DevTools Injection #18277
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facebook-github-bot
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React Core Team
sebmarkbage
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Mar 11, 2020
| bundleType: devToolsConfig.bundleType, | ||
| version: devToolsConfig.version, | ||
| rendererPackageName: devToolsConfig.rendererPackageName, | ||
| findFiberByHostInstance: devToolsConfig.findFiberByHostInstance, |
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This last line would be replaced with rendererConfig if we do https://github.com/facebook/react/pull/18233/files#r391135037
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bvaughn
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Mar 11, 2020
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I believe this change should let us compile out the intermediate steps here but there's still something about how this is wired up that confuses the compiler until leave an unnecessary closure in place. I think it's because our use of closures in findHostInstanceByFiber. |
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Related to this https://github.com/facebook/react/pull/18233/files#r391135037
We could encourage new arbitrary things to be added to this object through spread but that shares a namespace with our own things which risks us colliding and causing weird behavior. The Flow type defines that this is exact so to enforce that it is indeed exact, we can instead enumerate the values.
We really should be doing that everywhere in our internals, like we do with fiber cloning for example, and ideally avoid Object.assign as much as possible even in user facing APIs.
In DEV behavior I'm not as strict but this ships in PROD.