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Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub
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Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub
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Couldn't resolve `'types' can only be used in a .ts file. Vetur(8010)` · Issue #1347 · vuejs/vetur · GitHub
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Plugin doesn't check .ts and .tsx files out of box? · Issue #355 · typescript-eslint/typescript-eslint · GitHub
Type annotations can only be used in TypeScript files.ts(8010) on React-Native CLI Startup · Issue #29123 · facebook/react-native · GitHub
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