How do I configure VS Code to use a specific linter or formatter?
Jul 12, 2025 am 01:29 AM
To have VS Code use a specific code checking tool or formatting tool, first make sure that the required tools are installed in the project and the editor is configured correctly. 1. Install the corresponding inspection or formatting tools, such as ESLint and Prettier for JavaScript/TypeScript, black and flake8 for Python, and install them through npm or pip; 2. Install extensions that support this tool in VS Code, such as the "ESLint" extension, the "Prettier - Code formatter" extension or the "Python" extension provided by Microsoft; 3. Configure settings.json files to specify default formatting tools, automatically formatting or repairing code during saving, and ensure that the path points to the correct local version; 4. Use configuration files in the root directory of the project such as .eslintrc, pyproject.toml or .prettierrc to define tool behavior. If the formatting or inspection results do not meet expectations, these configuration files should be checked first. After completing the above steps, VS Code can automatically format and check the code according to the configuration.
Sure, setting up VS Code to use a specific linter or formatter isn't too bad once you know what steps to follow. The key is making sure your project has the right tools installed and that VS Code is configured to recognize and use them.
1. Install the Linter or Formatter
Before VS Code can use a linter or formatter, it needs to be installed either globally or locally in your project. For example:
- For JavaScript/TypeScript, you might install ESLint or Prettier
- For Python, maybe flake8 , black , or pylint
You can install these using your package manager:
npm install eslint --save-dev # for JavaScript projects pip install black # for Python projects
Make sure to install the tooling that matches your language and preferences.
2. Add the Right Extension in VS Code
VS Code doesn't support every linter/formatter out of the box. You'll need to install an extension that integrates the tool with the editor.
For example:
- ESLint → Install the official "ESLint" extension
- Prettier → Use the "Prettier - Code formatter" extension
- Black (Python) → Try the "Python" extension by Microsoft
These extensions help connect the tools on your system with VS Code's interface.
3. Configure Settings.json
Once everything is installed, you'll want to tell VS Code which linter or formatter to use. This is usually done in your workspace or user settings ( settings.json ):
{
"editor.defaultFormatter": "esbenp.prettier-vscode",
"[javascript]": {
"editor.formatOnSave": true,
"editor.codeActionsOnSave": {
"source.fixAll.eslint": true
}
},
"eslint.enable": true
}This setup tells VS Code to format JavaScript files with Prettier and lint with ESLint when saving.
Also, make sure the formatter/linter path is correct if you're using a local version rather than global:
"python.formatting.blackPath": "/path/to/black"
4. Use Workspace-Specific Config Files
Most linters and formatters rely on config files in your project root like .eslintrc , pyproject.toml , or .prettierrc . These define how the tools behave.
If VS Code isn't formatting or linting the way you expect, double-check these files — they're often the reason for unexpected behavior.
That's basically it. Once set up, VS Code should automatically lint and format as you code, depending on how you've configured it. It's not complicated, but getting all the pieces aligned can sometimes trip people up.
The above is the detailed content of How do I configure VS Code to use a specific linter or formatter?. For more information, please follow other related articles on the PHP Chinese website!
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