javascript - Eslint: disable all rules except 1 rule? - Stack Overflow

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I want to use Eslint to check the output of my minifier. Obviously, this would trigger a lot of errors. I'm only interested in a single rule (pat/pat). How can I disable all the other ones?

Edit:

Here's my .eslintrc.js:

module.exports = {
  extends: ['plugin:pat/remended'],
  env: {
    browser: true,
  },
};

Edit:

I found the reset option in the docs, but it seems to be disabled for my installation:

$ npx eslint file.js --config .eslintrc.browserslist.js --quiet --reset
Invalid option '--reset' - perhaps you meant '--ext'?
$ npx eslint --version
v6.8.0
$ npx eslint -h
eslint [options] file.js [file.js] [dir]

Basic configuration:
  --no-eslintrc                   Disable use of configuration from .eslintrc.*
  -c, --config path::String       Use this configuration, overriding .eslintrc.* config options if present
  --env [String]                  Specify environments
  --ext [String]                  Specify JavaScript file extensions - default: .js
  --global [String]               Define global variables
  --parser String                 Specify the parser to be used
  --parser-options Object         Specify parser options
  --resolve-plugins-relative-to path::String  A folder where plugins should be resolved from, CWD by default

Specifying rules and plugins:
  --rulesdir [path::String]       Use additional rules from this directory
  --plugin [String]               Specify plugins
  --rule Object                   Specify rules

Fixing problems:
  --fix                           Automatically fix problems
  --fix-dry-run                   Automatically fix problems without saving the changes to the file system
  --fix-type Array                Specify the types of fixes to apply (problem, suggestion, layout)

Ignoring files:
  --ignore-path path::String      Specify path of ignore file
  --no-ignore                     Disable use of ignore files and patterns
  --ignore-pattern [String]       Pattern of files to ignore (in addition to those in .eslintignore)

Using stdin:
  --stdin                         Lint code provided on <STDIN> - default: false
  --stdin-filename String         Specify filename to process STDIN as

Handling warnings:
  --quiet                         Report errors only - default: false
  --max-warnings Int              Number of warnings to trigger nonzero exit code - default: -1

Output:
  -o, --output-file path::String  Specify file to write report to
  -f, --format String             Use a specific output format - default: stylish
  --color, --no-color             Force enabling/disabling of color

Inline configuration ments:
  --no-inline-config              Prevent ments from changing config or rules
  --report-unused-disable-directives  Adds reported errors for unused eslint-disable directives

Caching:
  --cache                         Only check changed files - default: false
  --cache-file path::String       Path to the cache file. Deprecated: use --cache-location - default: .eslintcache
  --cache-location path::String   Path to the cache file or directory

Miscellaneous:
  --init                          Run config initialization wizard - default: false
  --env-info                      Output execution environment information - default: false
  --no-error-on-unmatched-pattern  Prevent errors when pattern is unmatched
  --debug                         Output debugging information
  -h, --help                      Show help
  -v, --version                   Output the version number
  --print-config path::String     Print the configuration for the given file

I want to use Eslint to check the output of my minifier. Obviously, this would trigger a lot of errors. I'm only interested in a single rule (pat/pat). How can I disable all the other ones?

Edit:

Here's my .eslintrc.js:

module.exports = {
  extends: ['plugin:pat/remended'],
  env: {
    browser: true,
  },
};

Edit:

I found the reset option in the docs, but it seems to be disabled for my installation:

$ npx eslint file.js --config .eslintrc.browserslist.js --quiet --reset
Invalid option '--reset' - perhaps you meant '--ext'?
$ npx eslint --version
v6.8.0
$ npx eslint -h
eslint [options] file.js [file.js] [dir]

Basic configuration:
  --no-eslintrc                   Disable use of configuration from .eslintrc.*
  -c, --config path::String       Use this configuration, overriding .eslintrc.* config options if present
  --env [String]                  Specify environments
  --ext [String]                  Specify JavaScript file extensions - default: .js
  --global [String]               Define global variables
  --parser String                 Specify the parser to be used
  --parser-options Object         Specify parser options
  --resolve-plugins-relative-to path::String  A folder where plugins should be resolved from, CWD by default

Specifying rules and plugins:
  --rulesdir [path::String]       Use additional rules from this directory
  --plugin [String]               Specify plugins
  --rule Object                   Specify rules

Fixing problems:
  --fix                           Automatically fix problems
  --fix-dry-run                   Automatically fix problems without saving the changes to the file system
  --fix-type Array                Specify the types of fixes to apply (problem, suggestion, layout)

Ignoring files:
  --ignore-path path::String      Specify path of ignore file
  --no-ignore                     Disable use of ignore files and patterns
  --ignore-pattern [String]       Pattern of files to ignore (in addition to those in .eslintignore)

Using stdin:
  --stdin                         Lint code provided on <STDIN> - default: false
  --stdin-filename String         Specify filename to process STDIN as

Handling warnings:
  --quiet                         Report errors only - default: false
  --max-warnings Int              Number of warnings to trigger nonzero exit code - default: -1

Output:
  -o, --output-file path::String  Specify file to write report to
  -f, --format String             Use a specific output format - default: stylish
  --color, --no-color             Force enabling/disabling of color

Inline configuration ments:
  --no-inline-config              Prevent ments from changing config or rules
  --report-unused-disable-directives  Adds reported errors for unused eslint-disable directives

Caching:
  --cache                         Only check changed files - default: false
  --cache-file path::String       Path to the cache file. Deprecated: use --cache-location - default: .eslintcache
  --cache-location path::String   Path to the cache file or directory

Miscellaneous:
  --init                          Run config initialization wizard - default: false
  --env-info                      Output execution environment information - default: false
  --no-error-on-unmatched-pattern  Prevent errors when pattern is unmatched
  --debug                         Output debugging information
  -h, --help                      Show help
  -v, --version                   Output the version number
  --print-config path::String     Print the configuration for the given file

• javascript
• eslint

Share Improve this question Follow edited Mar 4, 2020 at 1:39 Leo Jiang asked Mar 4, 2020 at 1:05 Leo JiangLeo Jiang 26.1k5858 gold badges176176 silver badges327327 bronze badges

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5 Answers 5

Sorted by: Reset to default 3

You can add root: true to the config file, that way it will not inherit the other config files. The eslint.json file should look like this:

module.exports = {
  root: true,
  rules: {
    semi: ["error", "always"],
  }
};

If you want to use your .eslintrc file to keep your configuration (parser, plugin settings, etc), you can use eslint-nibble with the --rule=pat/pat flag. This will respect your normal configuration, but only show you errors from that one rule.

Disclaimer: I'm the creator of eslint-nibble.

Eslint's parser options currently default to ecmaVersion: 5[1]. So in case, your code is using ECMAScript > 5, eslint will start enforcing the rules of ECMAScript 5, 6, and so on. Hence, apart from defining root: true, it's important finding the right ecmaVersion. An ideal eslint config for projects beyond ECMAScript 5 that has all eslint rules disabled looks as follows:

module.exports = {
  root: true,
  parserOptions: {
    ecmaVersion: 9
  },
  rules: {}
};

Where parserOptions.ecmaVersion is tuned to the code base's ECMAScript version.

• 1: https://eslint/docs/user-guide/configuring/language-options#specifying-parser-options

I had a similar problem, and I solved it by adding --no-config-lookup and --no-inline-config:

eslint --no-config-lookup --no-inline-config --rule "YOUR_ONE_AND_ONLY_ONE_RULE"  js/**/*.js

I did not use any configuration file for my use case.

Simply specify the rule you want to use in your ESLint config, for instance this would enable only the "semi" rule:

module.exports = {
    "rules": {
        "semi": ["error", "always"],
    }
};

https://eslint/docs/user-guide/configuring#configuring-rules

Or you could specify it with the --rule flag

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