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Add types for the engines export #158

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16 changes: 11 additions & 5 deletions gray-matter.d.ts
Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,10 @@ declare function matter<
>(input: I | { content: I }, options?: O): matter.GrayMatterFile<I>

declare namespace matter {
type Engine =
| ((input: string) => object)
| { parse: (input: string) => object; stringify?: (data: object) => string }

type Input = string | Buffer
interface GrayMatterOption<
I extends Input,
Expand All @@ -28,11 +32,7 @@ declare namespace matter {
eval?: boolean
excerpt?: boolean | ((input: I, options: O) => string)
excerpt_separator?: string
engines?: {
[index: string]:
| ((input: string) => object)
| { parse: (input: string) => object; stringify?: (data: object) => string }
}
engines?: { [index: string]: Engine }
language?: string
delimiters?: string | [string, string]
}
Expand All @@ -45,6 +45,12 @@ declare namespace matter {
matter: string
stringify(lang: string): string
}

export const engines: {
json: Engine,
yaml: Engine,
javascript: Engine
};

/**
* Stringify an object to YAML or the specified language, and
Expand Down