VS Code format on save: editor.formatOnSave and default formatters

"editor.formatOnSave": true makes VS Code run the document formatter every time you save. Which formatter runs is decided by editor.defaultFormatter, globally or per language. Put the settings in the project's .vscode/settings.json so everyone who opens the repository gets the same behaviour.

A typical project setup

{
  "editor.formatOnSave": true,
  "editor.defaultFormatter": "esbenp.prettier-vscode",
  "editor.codeActionsOnSave": {
    "source.fixAll.eslint": "explicit"
  },
  "[python]": {
    "editor.defaultFormatter": "charliermarsh.ruff"
  },
  "[makefile]": {
    "editor.insertSpaces": false
  }
}

{
  "recommendations": ["esbenp.prettier-vscode", "dbaeumer.vscode-eslint", "charliermarsh.ruff"]
}

extensions.json makes VS Code suggest the extensions the settings refer to.

Related settings

If nothing happens on save, open the Command Palette and run Format Document With…: when several formatters are installed and none is the default, VS Code asks you to choose instead of formatting. The Output panel, channel of the formatter extension, shows its errors.