![Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub](https://user-images.githubusercontent.com/1685700/28547584-639647c2-7084-11e7-952a-ba525e7d60a2.png)
Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub
![PhpStorm 2020.2: PHP 8 Union Types, New Control Flow Engine, GitHub Pull Requests, OpenAPI, Extract Class Refactoring | The PhpStorm Blog PhpStorm 2020.2: PHP 8 Union Types, New Control Flow Engine, GitHub Pull Requests, OpenAPI, Extract Class Refactoring | The PhpStorm Blog](https://blog.jetbrains.com/wp-content/uploads/2020/07/blog-2x_.png)
PhpStorm 2020.2: PHP 8 Union Types, New Control Flow Engine, GitHub Pull Requests, OpenAPI, Extract Class Refactoring | The PhpStorm Blog
Type annotations can only be used in TypeScript files.ts(8010) on React-Native CLI Startup · Issue #29123 · facebook/react-native · GitHub
Ability to disable TS8010: 'types' can only be used in a .ts file. · Issue #35470 · microsoft/TypeScript · GitHub
![Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub](https://user-images.githubusercontent.com/21275217/32146330-296a8a2e-bcd6-11e7-9571-cccb2a9983ec.png)
Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub
![Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub](https://user-images.githubusercontent.com/1685700/28547570-55741cdc-7084-11e7-8856-dd1cc9a1726c.png)
Type aliases can be used only in a .ts file' error popping up in Flow enabled files · Issue #15171 · microsoft/vscode · GitHub
GitHub - jstwister/vscode-flow-ide: Visual Studio Code extension for javascript Flowtype static type checker
![Flow type checking only works in VSCode when file is Flow type checking only works in VSCode when file is](https://user-images.githubusercontent.com/19795/42841511-2b599c7e-89bf-11e8-9cac-54abfd1abeca.png)