66 lines
1.6 KiB
Markdown
66 lines
1.6 KiB
Markdown
# import/max-dependencies
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Forbid modules to have too many dependencies (`import` or `require` statements).
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This is a useful rule because a module with too many dependencies is a code smell, and usually indicates the module is doing too much and/or should be broken up into smaller modules.
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Importing multiple named exports from a single module will only count once (e.g. `import {x, y, z} from './foo'` will only count as a single dependency).
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## Options
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This rule has the following options, with these defaults:
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```js
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"import/max-dependencies": ["error", {
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"max": 10,
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"ignoreTypeImports": false,
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}]
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```
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### `max`
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This option sets the maximum number of dependencies allowed. Anything over will trigger the rule. **Default is 10** if the rule is enabled and no `max` is specified.
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Given a max value of `{"max": 2}`:
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### Fail
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```js
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import a from './a'; // 1
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const b = require('./b'); // 2
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import c from './c'; // 3 - exceeds max!
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```
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### Pass
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```js
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import a from './a'; // 1
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const anotherA = require('./a'); // still 1
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import {x, y, z} from './foo'; // 2
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```
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### `ignoreTypeImports`
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Ignores `type` imports. Type imports are a feature released in TypeScript 3.8, you can [read more here](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-8.html#type-only-imports-and-export). Defaults to `false`.
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Given `{"max": 2, "ignoreTypeImports": true}`:
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### Fail
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```ts
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import a from './a';
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import b from './b';
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import c from './c';
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```
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### Pass
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```ts
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import a from './a';
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import b from './b';
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import type c from './c'; // Doesn't count against max
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```
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## When Not To Use It
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If you don't care how many dependencies a module has.
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