typescript:error TS2693:'Promise'只引用一个类型,但在这里被用作值

Question

我正在尝试使用Typescript作为我的AWS Lambda,我在使用promises时遇到以下错误.

error TS2693: 'Promise' only refers to a type, but is being used as a value here.

我尝试在代码中使用以下变体

使用Promise构造函数

responsePromise = new Promise((resolve, reject) => {
                    return reject(new Error(`missing is needed data`))
                })

使用Promise.reject

responsePromise = Promise.reject(new Error(`Unsupported method "${request.httpMethod}"`));

版本

以下是我的dev依赖项中的版本:

"typescript": "^2.2.2"
"@types/aws-lambda": "0.0.9",
"@types/core-js": "^0.9.40",
"@types/node": "^7.0.12",

tsconfig.json的内容

{
    "compileOnSave": true,
    "compilerOptions": {
        "module": "commonjs",
        // "typeRoots" : ["./typings", "./node_modules/@types"],
        "target": "es5",
        // "types" : [ "core-js" ],
        "noImplicitAny": true,
        "strictNullChecks": true,
        "allowJs": true,
        "noEmit": true,
        "alwaysStrict": true,
        "preserveConstEnums": true,
        "sourceMap": true,
        "outDir": "dist",
        "moduleResolution": "Node",
        "declaration": true,
        "lib": [
            "es6"
        ]
    },
    "include": [
        "index.ts",
        "lib/**/*.ts"
    ],
    "exclude": [
        "node_modules",
        "**/*.spec.ts"
    ]
}

我正在使用具有以下配置的grunt-ts来运行ts任务.

ts: {
            app: {
                tsconfig: {
                    tsconfig: "./tsconfig.json",
                    ignoreSettings: true
                }
            },
...

我尝试使用我得到的解决方案:[ts]'Promise'仅指一种类型,但在这里被用作值但没有运气.

Answer 1

我有同样的问题,aws-sdk我通过使用解决了它"target": "es2015".这是我的tsconfig.json档案.

{
    "compilerOptions": {
        "outDir": "./dist/",
        "sourceMap": false,
        "noImplicitAny": false,
        "module": "commonjs",
        "target": "es2015"
    },
    "include": [
        "src/**/*"
    ],
    "exclude": [
        "node_modules",
        "**/*.spec.ts"
    ]
}

Answer 2

今天遇到同样的错误并解决了它:

npm i --save-dev  @types/es6-promise

更新:

加:

import {Promise} from 'es6-promise'

Answer 3

我通过在tsconfig.json文件中添加以下代码解决了这个问题.

"lib": [
    "ES5",
    "ES2015",
    "DOM",
    "ScriptHost"]

Answer 4

通过在compilerOptions中更改目标来解决.

{
"compilerOptions": {
    "module": "es2015",
    "target": "es2015",
    "lib": [
        "es2016",
        "dom"
    ],
    "moduleResolution": "node",
    "noImplicitAny": false,
    "sourceMap": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "outDir": "./public/js/app"
},
"exclude": [
    "node_modules",
    "public/js",
    "assets/app/polyfills.ts"
],
"angularCompilerOptions": {
    "skipMetadataEmit": true
}
}

Answer 5

这是我的提示.使用vscode 1.21.1测试(在MAC上)

将下面的配置放到tsconfig.json中

"lib": [
"es2016",
"dom"
]

到 compilerOptions

重新启动IDE(此操作是必需的:D)

Answer 6

我遇到了此错误，但通过使用以下命令解决了该问题，我的ts文件名为promises-fs.ts：

tsc promises-fs.ts --target es6 && node promises-fs.js

错误消失了

Answer 7

将以下行添加到文件中引发错误.这应该解决问题

declare var Promise: any;

Answer 8

我遇到了同样的问题，直到我在 typeScript 3.0.1 中添加了以下 lib 数组

tsconfig.json

{
  "compilerOptions": {
    "outDir": "lib",
    "module": "commonjs",
    "allowJs": false,
    "declaration": true,
    "target": "es5",
    "lib": ["dom", "es2015", "es5", "es6"],
    "rootDir": "src"
  },
  "include": ["./**/*"],
  "exclude": ["node_modules", "**/*.spec.ts"]
}

Answer 9

我index.ts用这些组合属性消除了同样的错误：

在 tsconfig.json 中：

  "compilerOptions": {
    "target": "ES6"

在 package.json 中：

  "main": "index.ts",
  "scripts": {
    "start": "tsc -p tsconfig.json && node index.js"