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1. In @vue/cli-plugin-eslint 3.1.0+, eslint will be explicitly added to the project's package.json, so it is **optional**. 2. `optionalDependencies` will still be installed by npm by default, just no longer cause installation to fail when error happens. 3. ESLint v4 did cause weird errors sometimes, like `npm WARN ajv-keywords@2.1.1 requires a peer of ajv@^5.0.0 but none is installed.` Though this warning never caused any errors on my machine, I think it's good to make the plugin fail-safe.
@vue/cli-plugin-eslint
eslint plugin for vue-cli
Injected Commands
-
vue-cli-service lintUsage: vue-cli-service lint [options] [...files] Options: --format [formatter] specify formatter (default: codeframe) --no-fix do not fix errors --max-errors specify number of errors to make build failed (default: 0) --max-warnings specify number of warnings to make build failed (default: Infinity)Lints and fixes files. If no specific files are given, it lints all files in
srcandtest.Other ESLint CLI options are also supported.
Configuration
ESLint can be configured via .eslintrc or the eslintConfig field in package.json.
Lint-on-save during development with eslint-loader is enabled by default. It can be disabled with the lintOnSave option in vue.config.js:
module.exports = {
lintOnSave: false
}
When set to true, eslint-loader will emit lint errors as warnings. By default, warnings are only logged to the terminal and does not fail the compilation.
To make lint errors show up in the browser overlay, you can use lintOnSave: 'error'. This will force eslint-loader to always emit errors. this also means lint errors will now cause the compilation to fail.
Alternatively, you can configure the overlay to display both warnings and errors:
// vue.config.js
module.exports = {
devServer: {
overlay: {
warnings: true,
errors: true
}
}
}
When lintOnSave is a truthy value, eslint-loader will be applied in both development and production. If you want to disable eslint-loader during production build, you can use the following config:
// vue.config.js
module.exports = {
lintOnSave: process.env.NODE_ENV !== 'production'
}
Installing in an Already Created Project
vue add @vue/eslint
Injected webpack-chain Rules
config.module.rule('eslint')config.module.rule('eslint').use('eslint-loader')