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Improve "native" component stacks host component frames

facebook/react#22531·250633·JavaScript·1805 天未动·0 条评论·上游最近活跃 ·池内状态:可认领
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上游 issue 正文

React and React DevTools generate [component stacks](https://github.com/facebook/react/blob/main/packages/react-devtools/CHANGELOG.md#component-stacks) in the same format as native Error stacks. For user components (class and function components) this is done by intentionally causing the component's render method to throw an Error, and then stitching the error stack frames together: https://github.com/facebook/react/blob/5fa4d79b00988f354073bc27313363dd5cce9cd3/packages/react-devtools-shared/src/backend/DevToolsComponentStackFrame.js#L62-L203 This results in a component stack like this: ![image](https://user-images.githubusercontent.com/29597/136594272-3d290470-b0fb-48ac-b0a1-a32402448649.png) But for "host components" (e.g. `HTMLDivElement` or `View`) when we have no source location to show, we fall back to showing just "at div" or "at View". We could probably more closely mirror what JavaScript engines do by appending a "location" like `(native)` or `(unknown location)` (as the [v8 docs](https://v8.dev/docs/stack-trace-api#appendix%3A-stack-trace-format) suggest) or `(anonymous)` as v8 seems to actually do in testing. The trick would be matching the specific browser/engine's behavior for this. For example, running the following code in Chrome or Node... ```js JSON.stringify({}, () => console.log(new Error(''))); ``` ...will show the stack frame: ``` at JSON.stringify (<anonymous>) ``` while Firefox will show: ``` Error: <anonymous> file:///path/to/script:7 ``` Improving this format so that host components more closely mirror native Error stacks will help simplify things like React Native's error parsing.
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