Type alias ExtractObjectPaths<T, K>

ExtractObjectPaths<T, K>: If_PlainObject<T> extends true
    ? {
        [P in keyof T]: P extends string | number
            ? If_PlainObject<T[P]> extends true
                ? K extends ""
                    ? ExtractObjectPaths<T[P], `${P}`>
                    : ExtractObjectPaths<T[P], `${K}.${P}`>
                : T[P] extends (infer U)[]
                    ? K extends ""
                        ? ExtractObjectPaths<U, `${P}[0]`>
                        : ExtractObjectPaths<U, `${K}.${P}[0]`>
                    : K extends ""
                        ? `${P}`
                        : `${K}.${P}`
            : never
    }[keyof T]
    : T extends (infer U)[]
        ? ExtractObjectPaths<U, `${K}[0]`>
        : never

传入一个任意嵌套深度的对象类型,返回该对象所有键唯一路径组成的联合类型,路径分隔符为. 可与ExtractObjectAllPaths进行对比参照

Type Parameters

  • T

  • K extends string = ""

Example

ExtractObjectPaths<{
  a: string;
  b: {
      c: number;
      d: {
          e: string
      }
  }
}> // "a" | "b.c" | "b.d.e"

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