# Check layers and slices imports (`conarti-fsd/layers-slices`)

This rule is aimed at checking the compliance of layer and slice imports by methodology.

## Rule Details

Examples of **incorrect** code for this rule:

```js
import { Bar } from 'entities/bar' // filename: src/entities/baz/ui.tsx 
import { FooType } from 'app/config' // filename: src/entities/bar/model.tsx 
```

Examples of **correct** code for this rule:

```js
import { Baz } from 'shared/bar'; // filename: src/shared/ui/foo
import { AppRouter } from 'app/providers/router'; // filename: src/app/App.tsx
import { Foo } from '@/entities/foo' // filename: src/features/bar/ui.tsx 
```

### Options

`allowTypeImports: true`

Disables the rule for type imports. This setting is included in the 'recommended' config.

```typescript
import type { FooType } from 'app/config' // filename: src/entities/bar/model.tsx
// Attention! Doesn't work if the type was imported like this. You should always use 'type' prefix
import { FooType } from 'app/config' // filename: src/entities/bar/model.tsx - still ERROR
```

Recommended to be used in conjunction with the `@typescript-eslint/no-restricted-imports` rule 
and the ` allowTypeImports: true` setting.
https://typescript-eslint.io/rules/no-restricted-imports/#allowtypeimports

`ignorePatterns`

Array of patterns to ignore validation.

Example settings:

```json
{
  "conarti-fsd/layers-slices": ["error", {
    "ignorePatterns": ["**/foo", "@/entities/bar"]
  }]
}
```

This example setting will ignore such paths:
```typescript
import { Bar } from '@/entities/bar'; // filename: src/shared/ui/baz, no error
import { Foo } from 'src/entities/foo'; // filename: src/shared/ui/baz, no error
```

## When Not To Use It

Disable this rule if you are just migrating to fsd. Or set it to display warnings instead of errors (default behavior).
You can also specify settings to ignore certain paths during migration.
In other situations, it is recommended to use this rule always.

## Further Reading

https://feature-sliced.design/docs/reference/units/layers