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javascript - 无法在 javascript 中“转换”打字稿定义

问题描述

我正在尝试将此 Apollo 打字稿存储库重写为 javascript。我尝试学习打字稿，但有一件事叫做“类型转换”或“类型断言”，这让我感到困惑。

让我用代码解释一下：

//cache.tsx

import { InMemoryCache, ReactiveVar, makeVar } from "@apollo/client";
import { Todos } from "./models/Todos";
import { VisibilityFilter, VisibilityFilters } from "./models/VisibilityFilter";

export const cache...{
...
...
}


export const todosVar: ReactiveVar<Todos> = makeVar<Todos>( //how i can 'convert' this type caster value to vanilla js?
  todosInitialValue 
);

export const visibilityFilterVar = makeVar<VisibilityFilter>(  //how i can 'convert' this type caster value to vanilla js?
  VisibilityFilters.SHOW_ALL
)

此 cache.tsx 使用的其他 2 个文件是：

//todos.tsx

export interface Todo {
  text: string;
  completed: boolean;
  id: number
}

export type Todos = Todo[];

和

VisibilityFilter.tsx


export type VisibilityFilter = {
  id: string;
  displayName: string;
}

export const VisibilityFilters: { [filter: string]: VisibilityFilter } = {
  SHOW_ALL: {
    id: "show_all",
    displayName: "All"
  },
  SHOW_COMPLETED: {
    id: "show_completed",
    displayName: "Completed"
  },
  SHOW_ACTIVE: {
    id: "show_active",
    displayName: "Active"
  }
}

在这种情况下如何避免打字稿类型检查，更重要的是，如何正确使用 ReactiveVar 和 makeVar 导入？

标签： javascriptreactjstypescriptapolloapollo-client

解决方案

只需像这样删除泛型：

从：

makeVar<Todos>(

到：

makeVar(

改变这个：

export const todosVar: ReactiveVar<Todos> = makeVar<Todos>( //how i can 'convert' this type caster value to vanilla js?
  todosInitialValue 
);

export const visibilityFilterVar = makeVar<VisibilityFilter>(  //how i can 'convert' this type caster value to vanilla js?
  VisibilityFilters.SHOW_ALL
)

对此：

export const todosVar = makeVar(todosInitialValue);
export const visibilityFilterVar = makeVar(VisibilityFilters.SHOW_ALL);

如何避免打字稿检查 - 将扩展名从 .ts 和 .tsx 分别替换为 .js 和 .jsx。

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