打字稿编译错误： <x> 不可分配给类型 <y>

Question

When I am trying to assign

let blob:Blob = {blobParts: [content]};

where content is a json.

where Blob is declared in lib.d.ts as

  interface Blob {
      readonly size: number;
      readonly type: string;
      msClose(): void;
      msDetachStream(): any;
      slice(start?: number, end?: number, contentType?: string): Blob;
  }

  declare var Blob: {
    prototype: Blob;
    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
  };

it is giving me the following error:

Type '{ blobParts: any[]; }' is not assignable to type 'Blob'. Object literal may only specify known properties, and 'blobParts' does not exist in type 'Blob'.

I have verified the spelling of blobParts a number of times

Answer 1

您应该使用new关键字构造Blob ...

let blob: Blob = new Blob([content]);