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Type Aliases can only be used in a .ts file · Issue #49894 · microsoft/vscode · GitHub
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Visual Studio Code:[js] types can only be used in a .ts file - Stack Overflow
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Type Aliases can only be used in a .ts file · Issue #49894 · 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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Unexpected [ts] errors in JavaScript files · Issue #54261 · microsoft/vscode · GitHub
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Type Aliases can only be used in a .ts file · Issue #49894 · microsoft/vscode · GitHub
