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80 lines
2.3 KiB
80 lines
2.3 KiB
4 years ago
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# import/no-useless-path-segments
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Use this rule to prevent unnecessary path segments in import and require statements.
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## Rule Details
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Given the following folder structure:
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```
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my-project
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├── app.js
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├── footer.js
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├── header.js
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└── helpers.js
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└── helpers
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└── index.js
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└── pages
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├── about.js
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├── contact.js
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└── index.js
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```
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The following patterns are considered problems:
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```js
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/**
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* in my-project/app.js
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*/
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import "./../pages/about.js"; // should be "./pages/about.js"
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import "./../pages/about"; // should be "./pages/about"
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import "../pages/about.js"; // should be "./pages/about.js"
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import "../pages/about"; // should be "./pages/about"
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import "./pages//about"; // should be "./pages/about"
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import "./pages/"; // should be "./pages"
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import "./pages/index"; // should be "./pages" (except if there is a ./pages.js file)
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import "./pages/index.js"; // should be "./pages" (except if there is a ./pages.js file)
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```
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The following patterns are NOT considered problems:
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```js
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/**
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* in my-project/app.js
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*/
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import "./header.js";
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import "./pages";
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import "./pages/about";
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import ".";
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import "..";
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import fs from "fs";
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```
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## Options
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### noUselessIndex
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If you want to detect unnecessary `/index` or `/index.js` (depending on the specified file extensions, see below) imports in your paths, you can enable the option `noUselessIndex`. By default it is set to `false`:
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```js
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"import/no-useless-path-segments": ["error", {
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noUselessIndex: true,
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}]
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```
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Additionally to the patterns described above, the following imports are considered problems if `noUselessIndex` is enabled:
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```js
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// in my-project/app.js
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import "./helpers/index"; // should be "./helpers/" (not auto-fixable to `./helpers` because this would lead to an ambiguous import of `./helpers.js` and `./helpers/index.js`)
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import "./pages/index"; // should be "./pages" (auto-fixable)
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import "./pages/index.js"; // should be "./pages" (auto-fixable)
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```
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Note: `noUselessIndex` only avoids ambiguous imports for `.js` files if you haven't specified other resolved file extensions. See [Settings: import/extensions](https://github.com/benmosher/eslint-plugin-import#importextensions) for details.
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### commonjs
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When set to `true`, this rule checks CommonJS imports. Default to `false`.
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