@boughtbymany/eslint-config-bbm
Bought By Many ESLint Config
Last updated 3 months ago by andypattendenbbm .
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Bought By Many - ESLint Config

Goals

  • Catch mistakes as they are made.
  • Flag areas where code can be improved.
  • Promote consistency in code style & structure.

Installation

npm i -D @boughtbymany/eslint-config-bbm eslint eslint-config-prettier eslint-plugin-jsdoc eslint-plugin-prettier prettier

You may also need to install additional peer dependencies (the dependencies required will depend on the configuration being used). To list the peer dependencies:

npm info @boughtbymany/eslint-config-bbm peerDependencies

Configuration

To use the standard configuration for JavaScript, create an .eslintrc.js file with the following contents:

module.exports = {
    extends: [
        '@boughtbymany/bbm',
    ],
}

You can also set up an .eslintignore file to ignore any files that shouldn't be linted:

/dist/

The node_modules directory is always ignored.

Multiple Configurations

This package also exposes other configurations:

Vue.js

To lint Vue.js single-file components (*.vue), add the following to the .eslintrc.js file:

module.exports = {
  extends: ["@boughtbymany/eslint-config-bbm/vue"],
}

Nuxt.js

To lint Nuxt.js projects, add the following to the .eslintrc.js file:

module.exports = {
  extends: ["@boughtbymany/eslint-config-bbm/nuxt"],
}

Node.js

To lint Node.js scripts add the following to the .eslintrc.js file:

module.exports = {
  extends: ["@boughtbymany/eslint-config-bbm/node"],
}

Jest

To lint Jest test scripts, add the following to the .eslintrc.js file:

module.exports = {
  extends: ["@boughtbymany/eslint-config-bbm/jest"],
}

HTML Scripts

To lint inline scripts contained within HTML files, add the following to the .eslintrc.js file:

module.exports = {
  extends: ["@boughtbymany/eslint-config-bbm/html"],
}

Cucumber

To lint Cucumber test scripts, add the following to the .eslintrc.js file:

module.exports = {
  extends: ["@boughtbymany/eslint-config-bbm/cucumber"],
}

How to use

Command line

Add package.json scripts, e.g:

{
    "scripts": {
        "lint:js": "eslint --ext .js,.vue src",
        "lint:js:fix": "npm run lint:js --fix"
    }
}

You will then be able to lint your codebase by running the command npm run lint:js and fix many issues with npm run lint:js:fix.

IDE Integrations

Atom

apm install linter-eslint

Go to Settings > Packages > linter-eslint > Settings and set the list of scopes to:

source.js, source.babel, source.vue, text.html.vue, text.html.basic

Visual Studio Code

code --install-extension dbaeumer.vscode-eslint

If Prettier is being used, add the following setting:

"prettier.eslintIntegration": true,

To enable Vue templates to be linted by the extension, add the following to your settings:

"eslint.validate": [
  "javascript",
  "vue"
],

Tips

Migrating old codebases

Run npm run lint --fix to clean up everything that can be cleaned up automatically and then commit those changes by themselves. If there are a lot of additional warnings that you'd rather not deal with straight away, then override them in the .eslintrc.js file as follows:

module.exports = {
    extends: [
        '@boughtbymany/bbm',
    ],
    rules: {
        // FIXME: Temporarily disabled – please clean up.
        'some-inconvenient-rule': 'off',
    }
}

Clean up these warnings as and when it's convenient.

Version control

Don't mix logical changes with lint changes in the same commit – if you are implementing a feature in an older codebase that doesn't already follow these lint rules, then commit any lint cleanups first, then implement the feature, or vice-versa.

If your editor has the feature Fix errors on save or similar, disable this. Otherwise it's likely you will mix logical and lint changes accidentally.

Excluding code from linting

If there's an exceptional situation where a rule that should normally be followed should be ignored in that specific case, disable that rule for that specific section of code.

Try to limit the size and scope of the exclusion as much as possible.

Disabling rules for a single line

// eslint-disable-next-line no-new
new Foo() // This code would normally generate a warning.

…or:

new Foo() // eslint-disable-line no-new

Disabling rules for larger sections

/* eslint-disable no-new */

new Foo() // This code would normally generate a warning.

/* eslint-enable no-new */

If you disable a rule for an entire file, ensure you re-enable it at the end of the file to make sure that you aren't inadvertently disabling the rule for any code that ends up concatenated with it.

See: ESLint Documentation § Disabling Rules with Inline Comments

If you have to disable a rule in more than a couple of cases, it may be the case that the rule is too noisy, or you may be doing something incorrectly. Consider whether the rule should be removed from this configuration, or if there's a better way of writing the code in question.

Adding new rules

New rules should be added when they stand a chance of catching a mistake, push developers to write better code, or if they make the code more consistently styled. Avoid rules that force developers to jump through hoops just to keep the linter happy.

Sometimes new rules get added to this package's dependencies. It's worth reviewing the changes when updating these dependencies to see if there are any useful additions we can enable.

Removing rules

If there's a rule that is generating too much noise in code that is otherwise perfectly fine, consider removing it from this configuration. Before doing so, take the time to understand why the rule exists and whether there's a better way of writing the code in question.

More information

Current Tags

  • 2.3.1                                ...           latest (3 months ago)

12 Versions

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  • 2.3.0                                ...           3 months ago
  • 2.2.1                                ...           6 months ago
  • 2.2.0                                ...           6 months ago
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  • 2.1.0                                ...           8 months ago
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