【发布时间】：2021-07-26 02:32:43
【问题描述】：
Flow 似乎在新项目中产生了很多错误。我做错了什么？
我做了什么：
- 使用
react-native init FlowProject创建了一个新的 React Native 项目 - 关注set-up for Flow with yarn and Babel
yarn add --dev babel-cli babel-preset-flowyarn add --dev flow-bin
- 跑
yarn run flow（.flowconfig由init生成）
这是我得到的错误：
.flowconfig:53 Unsupported option specified! (unsafe.enable_getters_and_setters)
error Command failed with exit code 8.
现在如果我删除指定的行（和版本号），我会得到一堆这两个错误：
Error: node_modules/react-native/Libraries/Inspector/Inspector.js:104
104: clearTimeout(_hideWait);
^^^^^^^^^ null. This type is incompatible with the expected param type of
733: declare function clearTimeout(timeoutId?: TimeoutID): void;
^^^^^^^^^ TimeoutID. See lib: /private/tmp/flow/flowlib_171966cc/core.js:733
Error: node_modules/react-native/Libraries/Lists/VirtualizedList.js:1094
1094: this.props.onEndReachedThreshold * visibleLength / 2;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ undefined. The operand of an arithmetic operation must be a number.
Found 19 errors
error Command failed with exit code 2.
如果我删除生成的 .flowconfig 文件（见最后），使用 yarn run flow init 重新创建它，然后再次运行 yarn run flow，我会收到以下错误（我只是显示这 5 个，其中大部分是相似）：
Error: node_modules/react-native/Libraries/Animated/src/AnimatedEvent.js:101
101: if (__DEV__) {
^^^^^^^ __DEV__. Could not resolve name
Error: node_modules/react-native/Libraries/Inspector/Inspector.js:104
104: clearTimeout(_hideWait);
^^^^^^^^^ null. This type is incompatible with the expected param type of
733: declare function clearTimeout(timeoutId?: TimeoutID): void;
^^^^^^^^^ TimeoutID. See lib: /private/tmp/flow/flowlib_15451c3f/core.js:733
Error: node_modules/react-native/Libraries/Interaction/InteractionManager.js:107
107: return promise.done(...args);
^^^^^^^^^^^^^^^^^^^^^ call of method `done`. Function cannot be called on
107: return promise.done(...args);
^^^^^^^^^^^^^^^^^^^^^ property `done` of unknown type
Error: node_modules/react-native/Libraries/Interaction/TaskQueue.js:165
165: .done();
^^^^ property `done`. Property not found in
v---------
152: task.gen()
153: .then(() => {
154: DEBUG && infoLog(
...:
164: })
-^ Promise
Error: node_modules/react-native/Libraries/Lists/VirtualizedList.js:1016
1016: distanceFromEnd < onEndReachedThreshold * visibleLength &&
^^^^^^^^^^^^^^^^^^^^^ undefined. The operand of an arithmetic operation must be a number.
... 16 more errors (only 50 out of 66 errors displayed)
To see all errors, re-run Flow with --show-all-errors
error Command failed with exit code 2.
现在我知道我可以告诉 flow 忽略某些文件，但首先，我觉得很奇怪，flow 给我这些我没有生成的代码的错误。我还在 github 问题上看到我们不应该告诉 flow 忽略 node_modules。那么忽略第一个流分析给我们的每个文件的解决方案是什么？
以下是相关文件的列表：
Error node_modules/react-native/Libraries/Inspector/Inspector.js:
Error node_modules/react-native/Libraries/Interaction/InteractionManager.js
Error node_modules/react-native/Libraries/Lists/FlatList.js
Error node_modules/react-native/Libraries/Lists/ViewabilityHelper.js
Error node_modules/react-native/Libraries/Lists/VirtualizedList.js
Error node_modules/react-native/Libraries/Lists/VirtualizedSectionList.js
Error node_modules/react-native/Libraries/StyleSheet/flattenStyle.js
生成的 .flowconfig 文件
[ignore]
; We fork some components by platform
.*/*[.]android.js
; Ignore "BUCK" generated dirs
<PROJECT_ROOT>/\.buckd/
; Ignore unexpected extra "@providesModule"
.*/node_modules/.*/node_modules/fbjs/.*
; Ignore duplicate module providers
; For RN Apps installed via npm, "Libraries" folder is inside
; "node_modules/react-native" but in the source repo it is in the root
.*/Libraries/react-native/React.js
; Ignore polyfills
.*/Libraries/polyfills/.*
; Ignore metro
.*/node_modules/metro/.*
[include]
[libs]
node_modules/react-native/Libraries/react-native/react-native-interface.js
node_modules/react-native/flow/
node_modules/react-native/flow-github/
[options]
emoji=true
module.system=haste
munge_underscores=true
module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> 'RelativeImageStub'
module.file_ext=.js
module.file_ext=.jsx
module.file_ext=.json
module.file_ext=.native.js
suppress_type=$FlowIssue
suppress_type=$FlowFixMe
suppress_type=$FlowFixMeProps
suppress_type=$FlowFixMeState
suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(<VERSION>\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)
suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(<VERSION>\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)?:? #[0-9]+
suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
unsafe.enable_getters_and_setters=true
[version]
^0.61.0
【问题讨论】：
标签： react-native flowtype