Checkers overview

vite-plugin-checker includes seven checkers. Each one wraps an existing tool, so it uses the same configuration files and reports the same diagnostics as running that tool yourself.

Checker	Option	Packages to install	Accepts true
TypeScript	typescript	typescript	Yes
vue-tsc	vueTsc	vue-tsc, typescript	Yes
svelte-check	svelteCheck	svelte-check, typescript	Yes
ESLint	eslint	eslint	No
Biome	biome	@biomejs/biome	Yes
oxlint	oxlint	oxlint	Yes
Stylelint	stylelint	stylelint, meow	No

Enable a checker

Every checker is off by default. To enable one:

1. Install the packages it needs, listed in the table above, as dev dependencies of your project.
2. Set its option in the plugin config:
   • true uses the default configuration, for checkers that support it.
   • An object configures the checker. ESLint and Stylelint require an object with a lintCommand.
   • false, or leaving the option out, disables the checker.

checker({
  typescript: true,
  eslint: {
    lintCommand: 'eslint "./src/**/*.{ts,tsx}"',
  },
})

Options that apply to all checkers, such as overlay and enableBuild, are described in Shared options.

Choose between checkers

• For type checking, use one of the type checkers: typescript for plain TypeScript and React, vueTsc for Vue, or svelteCheck for Svelte. vueTsc and svelteCheck also check .ts files, so you don't need to enable the typescript checker as well.
• For linting, use the linter your project already runs. The checker uses its configuration file, so the results match your editor and CI.

Next steps

• Dev and build modes: see how each checker runs in dev mode and in build mode.