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How to Resolve Formatting Conflicts Between Prettier and ESLint

Use Prettier for formatting and ESLint for code quality. Add eslint-config-prettier, run each tool separately, and check local versions and config scope when conflicts persist.
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Let Prettier handle formatting and ESLint handle code-quality checks. To prevent ESLint from arguing over Prettier’s output, add eslint-config-prettier to disable overlapping ESLint rules, then run Prettier and ESLint as separate project commands. This keeps each tool focused and makes failures easier to understand.

Give Prettier and ESLint separate jobs

Prettier decides how code is formatted; ESLint reports code-quality issues. Prettier’s guidance is to “Use Prettier for code formatting concerns, and linters for code-quality concerns.” See Prettier’s guidance on integrating with linters.

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When both tools enforce stylistic rules, the same file can pass one tool and fail the other—or be reformatted repeatedly. Rather than trying to tune both tools until they produce identical output, remove the overlapping ESLint rules and make Prettier the formatting authority.

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Set up a reliable workflow

  1. Install project-local tools

    Use the project’s local Prettier installation so contributors and editor integrations can use the same version. Prettier recommends pinning an exact version because even patch releases can change formatting. Follow the current Prettier installation guidance for the package manager and setup your project uses.

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  2. Disable conflicting ESLint rules

    Add eslint-config-prettier to the project’s ESLint configuration. It turns off ESLint rules that Prettier makes unnecessary or that may conflict with its formatting. The exact configuration syntax depends on your ESLint configuration style and installed package versions; use the package’s current guidance for your setup. See Prettier’s installation documentation.

  3. Run formatting and linting separately

    Use prettier --write when you want to apply formatting. Use prettier --check to check whether files match Prettier’s output without changing them; it exits with code 1 when formatting changes are needed. Run your project’s ESLint command separately for code-quality diagnostics. The Prettier CLI documentation describes these options.

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  4. Check the configuration that applies to each file

    Prettier searches upward from a file’s directory for a configuration file and does not support a global configuration. If formatting differs between directories, confirm that each file resolves to the intended project configuration. See Prettier’s configuration documentation.

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Choose whether to run Prettier through ESLint

For most projects, invoke Prettier directly and keep it separate from ESLint. The alternative, eslint-plugin-prettier, runs Prettier as an ESLint rule and reports formatting differences as lint issues.

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Approach How it works Trade-offs
Separate commands Prettier formats or checks files; ESLint runs its own code-quality checks. Prettier’s recommended separation of responsibilities; formatting checks and lint diagnostics remain distinct.
eslint-plugin-prettier Prettier runs through ESLint, with formatting differences reported as lint issues. Prettier notes that this can produce many editor squiggles, run more slowly than invoking Prettier directly, and add another layer where failures can occur.

Use the plugin only if there is a specific reason your workflow needs formatting reported through ESLint. The trade-offs are described in Prettier’s linter integration guidance.

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Diagnose conflicts that persist

  • Different results between editor and terminal: check that both use the project’s local Prettier version, rather than an unrelated editor installation.
  • Files format differently in separate directories: inspect the configuration found by Prettier’s upward search from each file.
  • ESLint still flags formatting: verify that eslint-config-prettier is included in the applicable ESLint configuration and that the formatting rule is disabled.
  • Unclear which tool is failing: run prettier --write, then prettier --check and the project’s ESLint command separately. This distinguishes formatting changes from lint diagnostics.

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