Visual Studio Code
Visual Studio Code
Visual Studio Code has several editor integrations for using Flow.
Flow-Language-Support
Flow Language Support provides all the functionality you would expect — linting, intellisense, type tooltips and click-to-definition. It’s stable and under active development. However, it currently lacks on-the-fly linting and only shows you type errors after you save a file.
Others
Other extensions that you may try are:
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Licensed under the BSD License.
https://flow.org/en/docs/editors/vscode