角度:找不到Promise，Map，Set和Iterator [英] Angular: Can't find Promise, Map, Set and Iterator

查看：44
本文介绍了角度:找不到Promise，Map，Set和Iterator的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

安装Angular之后，Typescript编译器会不断出现一些错误，提示找不到Promise，Map，Set和Iterator.

After installing Angular, the Typescript compiler keep getting some errors about not finding Promise, Map, Set and Iterator.

直到现在我忽略了它们，但现在我需要Promise以便我的代码可以正常工作.

Until now I ignored them but now I need Promise so my code can work.

import {Component} from 'angular2/core';
@Component({
    selector: 'greeting-cmp',
    template: `<div>{{ asyncGreeting | async}}</div>`
})
export class GreetingCmp {
    asyncGreeting: Promise<string> = new Promise(resolve => {
// after 1 second, the promise will resolve
        window.setTimeout(() => resolve('hello'), 1000);
    });
}

Additional information:
npm -v is 2.14.12
node -v is v4.3.1
typescript v is 1.6

错误: 

................ERROS OF MY CODE.................
    C:\Users\armyTik\Desktop\angular2\greeting_cmp.ts
    Error:(7, 20) TS2304: Cannot find name 'Promise'.
    Error:(7, 42) TS2304: Cannot find name 'Promise'.
    .........................................
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\platform\browser.d.ts
    Error:(77, 90) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\core\application_ref.d.ts
    Error:(83, 60) TS2304: Cannot find name 'Promise'.
    Error:(83, 146) TS2304: Cannot find name 'Promise'.
    Error:(96, 51) TS2304: Cannot find name 'Promise'.
    Error:(96, 147) TS2304: Cannot find name 'Promise'.
    Error:(133, 90) TS2304: Cannot find name 'Promise'.
    Error:(171, 81) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\core\change_detection\parser\locals.d.ts
    Error:(3, 14) TS2304: Cannot find name 'Map'.
    Error:(4, 42) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\core\debug\debug_node.d.ts
    Error:(14, 13) TS2304: Cannot find name 'Map'.
    Error:(24, 17) TS2304: Cannot find name 'Map'.
    Error:(25, 17) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\core\di\provider.d.ts
    Error:(436, 103) TS2304: Cannot find name 'Map'.
    Error:(436, 135) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\core\linker\compiler.d.ts
    Error:(12, 50) TS2304: Cannot find name 'Promise'.
    Error:(16, 41) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\core\linker\dynamic_component_loader.d.ts
    Error:(108, 136) TS2304: Cannot find name 'Promise'.
    Error:(156, 150) TS2304: Cannot find name 'Promise'.
    Error:(197, 128) TS2304: Cannot find name 'Promise'.
    Error:(203, 127) TS2304: Cannot find name 'Promise'.
    Error:(204, 141) TS2304: Cannot find name 'Promise'.
    Error:(205, 119) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\core\render\api.d.ts
    Error:(13, 13) TS2304: Cannot find name 'Map'.
    Error:(14, 84) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\facade\async.d.ts
    Error:(27, 33) TS2304: Cannot find name 'Promise'.
    Error:(28, 45) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\facade\collection.d.ts
    Error:(1, 25) TS2304: Cannot find name 'MapConstructor'.
    Error:(2, 25) TS2304: Cannot find name 'SetConstructor'.
    Error:(4, 27) TS2304: Cannot find name 'Map'.
    Error:(4, 39) TS2304: Cannot find name 'Map'.
    Error:(7, 9) TS2304: Cannot find name 'Map'.
    Error:(8, 30) TS2304: Cannot find name 'Map'.
    Error:(11, 43) TS2304: Cannot find name 'Map'.
    Error:(12, 27) TS2304: Cannot find name 'Map'.
    Error:(14, 23) TS2304: Cannot find name 'Map'.
    Error:(15, 25) TS2304: Cannot find name 'Map'.
    Error:(95, 41) TS2304: Cannot find name 'Set'.
    Error:(96, 22) TS2304: Cannot find name 'Set'.
    Error:(97, 25) TS2304: Cannot find name 'Set'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\facade\lang.d.ts
    Error:(13, 17) TS2304: Cannot find name 'Map'.
    Error:(14, 17) TS2304: Cannot find name 'Set'.
    Error:(78, 59) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\facade\promise.d.ts
    Error:(2, 14) TS2304: Cannot find name 'Promise'.
    Error:(7, 32) TS2304: Cannot find name 'Promise'.
    Error:(8, 38) TS2304: Cannot find name 'Promise'.
    Error:(9, 35) TS2304: Cannot find name 'Promise'.
    Error:(9, 93) TS2304: Cannot find name 'Promise'.
    Error:(10, 34) TS2304: Cannot find name 'Promise'.
    Error:(11, 32) TS2304: Cannot find name 'Promise'.
    Error:(11, 149) TS2304: Cannot find name 'Promise'.
    Error:(12, 43) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\http\headers.d.ts
    Error:(43, 59) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\http\url_search_params.d.ts
    Error:(11, 16) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\platform\browser\browser_adapter.d.ts
    Error:(75, 33) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\angular2\src\platform\dom\dom_adapter.d.ts
    Error:(85, 42) TS2304: Cannot find name 'Map'.
    C:\Users\armyTik\Desktop\angular2\node_modules\rxjs\CoreOperators.d.ts
    Error:(35, 67) TS2304: Cannot find name 'Promise'.
    Error:(50, 66) TS2304: Cannot find name 'Promise'.
    Error:(89, 67) TS2304: Cannot find name 'Promise'.
    Error:(94, 38) TS2304: Cannot find name 'Promise'.
    Error:(94, 50) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\rxjs\Observable.d.ts
    Error:(46, 62) TS2304: Cannot find name 'Promise'.
    Error:(47, 42) TS2304: Cannot find name 'Iterator'.
    Error:(103, 74) TS2304: Cannot find name 'Promise'.
    Error:(103, 84) TS2304: Cannot find name 'Promise'.
    Error:(143, 66) TS2304: Cannot find name 'Promise'.
    Error:(158, 65) TS2304: Cannot find name 'Promise'.
    Error:(201, 66) TS2304: Cannot find name 'Promise'.
    Error:(206, 38) TS2304: Cannot find name 'Promise'.
    Error:(206, 50) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\rxjs\observable\ForkJoinObservable.d.ts
    Error:(6, 50) TS2304: Cannot find name 'Promise'.
    Error:(7, 58) TS2304: Cannot find name 'Promise'.
    C:\Users\armyTik\Desktop\angular2\node_modules\rxjs\observable\FromObservable.d.ts
    Error:(7, 38) TS2304: Cannot find name 'Promise'.
    Error:(7, 51) TS2304: Cannot find name 'Iterator'.
    C:\Users\armyTik\Desktop\angular2\node_modules\rxjs\observable\PromiseObservable.d.ts
    Error:(9, 31) TS2304: Cannot find name 'Promise'.
    Error:(10, 26) TS2304: Cannot find name 'Promise'.

推荐答案

带有Typescript ^ 2.0.0的Angular 5

这也应与Angular 2+的早期版本相同.

要使其与打字稿2.0.0配合使用，我执行了以下操作.

To get this to work with typescript 2.0.0, I did the following.

npm install --save-dev @types/core-js

tsconfig.json 

 "compilerOptions": {
    "declaration": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "mapRoot": "./",
    "module": "es6",
    "moduleResolution": "node",
    "noEmitOnError": true,
    "noImplicitAny": false,
    "outDir": "../dist/out-tsc",
    "sourceMap": true,
    "target": "es5",
    "typeRoots": [
      "../node_modules/@types"
    ],
    "types": [
      "core-js"
    ]
  }

有关打字稿2.0.0的@types的更多信息.

  1. https://blogs .msdn.microsoft.com/typescript/2016/06/15/the-future-of-declaration-files/
  2. https://www.npmjs.com/~types
  1. https://blogs.msdn.microsoft.com/typescript/2016/06/15/the-future-of-declaration-files/
  2. https://www.npmjs.com/~types

安装示例:

npm install --save-dev @types/core-js

重复的标识符错误

这很可能是因为已经从其他地方(很可能是旧的es6-shim)导入了重复的ecmascript 6类型的输入.

This is most likely because duplicate ecmascript 6 typings are already being imported from somewhere else most likely an old es6-shim.

仔细检查typings.d.ts，确保没有对es6的引用.如果有，请从键入目录中删除对es6的任何引用.

Double check typings.d.ts make sure there are no references to es6. Remove any reference to es6 from your typings directory if you have one.

例如:

这将与types:['core-js']在types.json中发生冲突.

This will conflict with types:['core-js'] in typings.json.

{
  "globalDependencies": {
    "core-js": "registry:dt/core-js#0.0.0+20160602141332" 
    // es6-shim will also conflict
  }
}

在tsconfig.json的类型数组中包含core-js应该是导入它的唯一位置.

Including core-js in the types array in tsconfig.json should be the only place it is imported from.

Angular CLI 1.0.0-beta.30

如果使用的是Angular-CLI，请删除typings.json中的lib数组.这似乎与在类型中声明core-js冲突.

If you are using the Angular-CLI, remove the lib array in typings.json. This seems to conflict with declaring core-js in types.

"compilerOptions" : {
  ...
  // removed "lib": ["es6", dom"],
  ...
},
"types" : ["core-js"]

使用Angular CLI的Webstorm/Intellij用户

确保已禁用内置的打字稿编译器.这将与CLI冲突.要使用CLI编译打字稿，您可以设置ng serve配置.

Make sure the built in typescript compiler is disabled. This will conflict with the CLI. To compile your typescript with the CLI you can setup a ng serve configuration.

Tsconfig编译器选项库vs类型

如果您不想安装核心js类型定义，则typescript附带了一些es6库.这些通过tsconfig中的lib: []属性使用.

If you prefer not to install core js type definitions there are some es6 libraries that come included with typescript. Those are used via the lib: [] property in tsconfig.

例如，请参见此处: https://www.typescriptlang.org/docs/handbook/compiler-options.html

注意:如果未指定--lib，则会注入默认库.这 注入的默认库为:►对于--target ES5:DOM，ES5，ScriptHost► 对于--target ES6:DOM，ES6，DOM.Iterable，ScriptHost

Note: If --lib is not specified a default library is injected. The default library injected is: ► For --target ES5: DOM,ES5,ScriptHost ► For --target ES6: DOM,ES6,DOM.Iterable,ScriptHost

tl; dr

"lib": [ "es6", "dom" ]或"types": ["core-js"]的简短答案可用于解析can't find Promise,Map, Set and Iterator.但是，同时使用这两种方法会导致重复的标识符错误.

Short answer either "lib": [ "es6", "dom" ] or "types": ["core-js"] can be used to resolve can't find Promise,Map, Set and Iterator. Using both however will cause duplicate identifier errors.

这篇关于角度:找不到Promise，Map，Set和Iterator的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

查看全文
相关文章
前端开发最新文章
热门教程
热门工具
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆