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224 lines
4.5 KiB
Markdown
224 lines
4.5 KiB
Markdown
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---
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title: "Compatibility"
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description: Nuxt Kit provides a set of utilities to help you check the compatibility of your modules with different Nuxt versions.
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---
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# Compatibility
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[source code](https://github.com/nuxt/nuxt/blob/main/packages/kit/src/compatibility.ts)
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Nuxt Kit utilities can be used in Nuxt 3, Nuxt 2 with Bridge and even Nuxt 2 without Bridge. To make sure your module is compatible with all versions, you can use the `checkNuxtCompatibility`, `assertNuxtCompatibility` and `hasNuxtCompatibility` functions. They will check if the current Nuxt version meets the constraints you provide. Also you can use `isNuxt2`, `isNuxt3` and `getNuxtVersion` functions for more granular checks.
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## `checkNuxtCompatibility`
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Checks if constraints are met for the current Nuxt version. If not, returns an array of messages. Nuxt 2 version also checks for `bridge` support.
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### Type
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```ts
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async function checkNuxtCompatibility(
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constraints: NuxtCompatibility,
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nuxt?: Nuxt
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): Promise<NuxtCompatibilityIssues>;
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interface NuxtCompatibility {
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nuxt?: string;
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bridge?: boolean;
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}
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interface NuxtCompatibilityIssue {
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name: string;
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message: string;
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}
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interface NuxtCompatibilityIssues extends Array<NuxtCompatibilityIssue> {
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toString(): string;
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}
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```
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### Parameters
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#### `constraints`
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**Type**: `NuxtCompatibility`
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**Default**: `{}`
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Constraints to check for. It accepts the following properties:
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- `nuxt` (optional)
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**Type**: `string`
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Nuxt version in semver format. Versions may be defined in Node.js way, for exmaple: `>=2.15.0 <3.0.0`.
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- `bridge` (optional)
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**Type**: `boolean`
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If set to `true`, it will check if the current Nuxt version supports `bridge`.
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#### `nuxt`
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**Type**: `Nuxt`
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**Default**: `useNuxt()`
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Nuxt instance. If not provided, it will be retrieved from the context via `useNuxt()` call.
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## `assertNuxtCompatibility`
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Asserts that constraints are met for the current Nuxt version. If not, throws an error with the list of issues as string.
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### Type
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```ts
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async function assertNuxtCompatibility(
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constraints: NuxtCompatibility,
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nuxt?: Nuxt
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): Promise<true>;
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interface NuxtCompatibility {
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nuxt?: string;
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bridge?: boolean;
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}
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```
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### Parameters
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#### `constraints`
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**Type**: `NuxtCompatibility`
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**Default**: `{}`
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Constraints to check for. It accepts the following properties:
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- `nuxt` (optional)
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**Type**: `string`
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Nuxt version in semver format. Versions may be defined in Node.js way, for exmaple: `>=2.15.0 <3.0.0`.
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- `bridge` (optional)
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**Type**: `boolean`
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If set to `true`, it will check if the current Nuxt version supports `bridge`.
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#### `nuxt`
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**Type**: `Nuxt`
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**Default**: `useNuxt()`
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Nuxt instance. If not provided, it will be retrieved from the context via `useNuxt()` call.
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## `hasNuxtCompatibility`
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Checks if constraints are met for the current Nuxt version. Return `true` if all constraints are met, otherwise returns `false`. Nuxt 2 version also checks for `bridge` support.
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### Type
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```ts
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async function hasNuxtCompatibility(
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constraints: NuxtCompatibility,
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nuxt?: Nuxt
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): Promise<boolean>;
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interface NuxtCompatibility {
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nuxt?: string;
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bridge?: boolean;
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}
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```
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### Parameters
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#### `constraints`
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**Type**: `NuxtCompatibility`
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**Default**: `{}`
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Constraints to check for. It accepts the following properties:
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- `nuxt` (optional)
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**Type**: `string`
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Nuxt version in semver format. Versions may be defined in Node.js way, for exmaple: `>=2.15.0 <3.0.0`.
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- `bridge` (optional)
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**Type**: `boolean`
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If set to `true`, it will check if the current Nuxt version supports `bridge`.
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#### `nuxt`
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**Type**: `Nuxt`
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**Default**: `useNuxt()`
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Nuxt instance. If not provided, it will be retrieved from the context via `useNuxt()` call.
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## `isNuxt2`
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Checks if the current Nuxt version is 2.x.
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### Type
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```ts
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function isNuxt2(nuxt?: Nuxt): boolean;
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```
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### Parameters
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#### `nuxt`
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**Type**: `Nuxt`
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**Default**: `useNuxt()`
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Nuxt instance. If not provided, it will be retrieved from the context via `useNuxt()` call.
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## `isNuxt3`
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Checks if the current Nuxt version is 3.x.
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### Type
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```ts
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function isNuxt3(nuxt?: Nuxt): boolean;
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```
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### Parameters
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#### `nuxt`
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**Type**: `Nuxt`
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**Default**: `useNuxt()`
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Nuxt instance. If not provided, it will be retrieved from the context via `useNuxt()` call.
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## `getNuxtVersion`
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Returns the current Nuxt version.
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### Type
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```ts
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function getNuxtVersion(nuxt?: Nuxt): string;
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```
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### Parameters
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#### `nuxt`
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**Type**: `Nuxt`
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**Default**: `useNuxt()`
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Nuxt instance. If not provided, it will be retrieved from the context via `useNuxt()` call.
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