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@shopify/eslint-plugin

Shopify’s ESLint rules and configs.

Installation

You'll first need to install ESLint:

With Yarn

yarn add --dev eslint

With npm

$ npm i eslint --save-dev

Next, install @shopify/eslint-plugin:

With Yarn

yarn add --dev @shopify/eslint-plugin

With npm

$ npm install @shopify/eslint-plugin --save-dev

Note: If you installed ESLint globally (using the -g flag) then you must also install @shopify/eslint-plugin globally.

Usage

As of version 46.0.0, this package uses Eslint's "Flat Config" format, not the legacy "eslintrc" format. To upgrade your Eslint configuration, follow the Configuration Migration Guide.

As of version 47.0.0, this package no longer configures formatting related rules in the es5, esnext and typescript configs, as ESLint depreacated their formatting related rules.

---

Shopify’s ESLint configs come bundled in this package. In order to use them, you include the relevant configurations in your project’s eslint.config.js. For example, the following will use the ESNext (ES2015 and later) config:

import shopifyEslintPlugin from '@shopify/eslint-plugin';

export default [...shopifyEslintPlugin.configs.esnext];

If you are working on an ES5 project, use the ES5 version of the configuration:

import shopifyEslintPlugin from '@shopify/eslint-plugin';

export default [...shopifyEslintPlugin.configs.es5];

You can also add some "augmenting" configs on top of the "core" config by using an array of linting configs. For example, the following configuration would provide a base ESNext config that is augmented by a React config:

import shopifyEslintPlugin from '@shopify/eslint-plugin';

export default [
  ...shopifyEslintPlugin.configs.esnext,
  ...shopifyEslintPlugin.configs.react,
];

Likewise, if you are using TypeScript and React, the following configuration uses the TypeScript base config with the React-specific rules provided by the React configuration file. To demonstrate multiple augmentations, we've also added the Prettier config, which disables rules that will conflict in projects using prettier.

import shopifyEslintPlugin from '@shopify/eslint-plugin';

export default [
  ...shopifyEslintPlugin.configs.typescript,
  ...shopifyEslintPlugin.configs.react,
  ...shopifyEslintPlugin.configs.prettier,
];

Provided configurations

This plugin provides the following core configurations:

• esnext: Use this for anything written with ES2015+ features.
• typescript: Use this for Typescript projects. The rules enabled in this config do not require type-checking to run. To enable all Typescript rules, you must augment this config with the typescript-type-checking config mentioned below.
• es5: Use this for legacy projects.

This plugin also provides the following tool-specific configurations, which can be used on top of the core configurations:

• typescript-type-checking Use this config to augment the typescript config to enable all TypeScript rules, including those that require type checking. These rules are slower to run and and you will need to specify a path to your tsconfig.json file in the "project" property of "parserOptions". The following example would provide all of the TypeScript rules, assuming the tsconfig.json is in the same directory as you ESlint configuration.

import shopifyEslintPlugin from '@shopify/eslint-plugin';

export default [
  ...shopifyEslintPlugin.configs.typescript,
  ...shopifyEslintPlugin.configs['typescript-type-checking'],
  {
    languageOptions: {
      parserOptions: {
        project: 'tsconfig.json',
      },
    },
  },
];

• react: Use this for React projects.
• polaris: Use this for projects that use Shopify’s React Polaris components.
• prettier: Use prettier for consistent formatting. Using this Shopify's prettier config will override the default Shopify eslint rules in favor of prettier formatting. Prettier must be installed within your project, as @shopify/eslint-plugin does not provide the dependency itself.
• webpack: Use this for projects built by webpack.

node

If you are working on a node module, we also provide the node configuration for you. Note that this configuration needs to be used in conjunction with one of the core configurations (either es5 or esnext). If you plan to transpile your code using Babel, use the esnext config. If you do not plan to do so, the config you choose depends on the version of node you wish to support, and how many ESNext features are natively available in that version. You can see a detailed list of what version of node supports what new JavaScript features by visiting http://node.green.

A node project that will use Babel for transpilation would need the following ESLint config:

import shopifyEslintPlugin from '@shopify/eslint-plugin';

export default [
  ...shopifyEslintPlugin.configs.esnext,
  ...shopifyEslintPlugin.configs.node,
];

Supported Typescript version…