使用 Typescript 的不可变 JS："No overload matches this call" 创建 Map / OrderedMap 时

Question

我正在使用 Typescript 版本 3.8.3 和 immutable@4.0.0-rc.12。

当我创建 OrderedMap 使用二维数组实例化它时，我从 Typescript 中得到错误。

let v: OrderedMap<number, string> = OrderedMap([ [ 3, '2' ] ])

Example on Codesandbox.io

似乎库的定义文件有误？ (immutable-nonambient.d.ts(1421, 39))。这是它给我的错误：

No overload matches this call.
  Overload 1 of 4, '(collection: Iterable<[string | number, string | number]>): OrderedMap<string | number, string | number>', gave the following error.
    Argument of type '(string | number)[][]' is not assignable to parameter of type 'Iterable<[string | number, string | number]>'.
      The types returned by '[Symbol.iterator]().next(...)' are incompatible between these types.
        Type 'IteratorResult<(string | number)[], any>' is not assignable to type 'IteratorResult<[string | number, string | number], any>'.
          Type 'IteratorYieldResult<(string | number)[]>' is not assignable to type 'IteratorResult<[string | number, string | number], any>'.
            Type 'IteratorYieldResult<(string | number)[]>' is not assignable to type 'IteratorYieldResult<[string | number, string | number]>'.
              Type '(string | number)[]' is missing the following properties from type '[string | number, string | number]': 0, 1
  Overload 2 of 4, '(obj: { [key: string]: string; }): OrderedMap<string, string>', gave the following error.
    Type '(string | number)[]' is not assignable to type 'string'.ts(2769)
immutable-nonambient.d.ts(1421, 39): The expected type comes from this index signature.

我对 Map 也有同样的看法。如果我创建空的 Map 或 OrderedMap 并将其分配给变量，我可以在没有错误的情况下对数据执行操作，因此以这种方式进行初始化会遇到麻烦。

使用此签名实例化：OrderedMap({ 3: '2' }) 没有编译错误。但显然我不能使用它，因为我希望我的键是数字，而使用数组表示法是实现它的唯一方法。

Answer 1

首先，@types/immutableis no longer supported

This package has been deprecated

Author message:

This is a stub types definition for Facebook's Immutable (https://github.com/facebook/immutable-js). Facebook's Immutable provides its own type definitions, so you don't need @types/immutable installed!

删除它后，您应该会在编辑器中获得不错的类型提示。

工作示例：https://stackblitz.com/edit/typescript-vwetmv?file=index.ts

更新

在编译器选项中添加 "target": "es2015" 可消除错误。

查看文档：Using TypeScript with Immutable.js v4

Immutable.js type definitions embrace ES2015. While Immutable.js itself supports legacy browsers and environments, its type definitions require TypeScript's 2015 lib. Include either "target": "es2015" or "lib": "es2015" in your tsconfig.json, or provide --target es2015 or --lib es2015 to the tsc command.

使用 Typescript 的不可变 JS："No overload matches this call" 创建 Map / OrderedMap 时

immutable JS with Typescript: "No overload matches this call" when creating Map / OrderedMap

typescript

immutable.js