How to turn off the prettier trailing comma in VS Code?

Since you are working on the Tour of Heroes project, it is maybe the .editorconfig file there that introduces conflicts with your VSCode Prettier settings. Try adding the following .prettierrc file at the root of your project :

{
  "trailingComma": "none"
}

The .prettierrc file has the highest priority over any setting, so it should override any conflict.

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