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

Question

I am trying to use Typescript for my AWS Lambda and i am getting the following errors where ever I use promises.

error TS2693: \'Promise\' only refers to a type,          


        

Answer 1

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

after up command, you'd better check tsconfig.json make sure the "target" must great than "es6". maybe tsc not support es5 yet.

Answer 2

I had the same issue with the aws-sdk and I solved it by using "target": "es2015". This is my tsconfig.json file.

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

Answer 3

I got rid of this same error in index.ts with these combined properties:

In tsconfig.json:

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

And in package.json:

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

Answer 4

Well, this might be counter-intuitive but I solved this adding esnext to my lib.

{
  "compilerOptions": {
    "lib": [
        "esnext"
    ],
    "target": "es5",
  }
}

The FIX, as suggested by the compiler is to

Try changing the lib compiler option to es2015 or later.

Answer 5

I solved this by adding below code to tsconfig.json file.

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

Answer 6

None of the up-voted answers here work for me. Here is a guaranteed and reasonable solution. Put this near the top of any code file that uses Promise...

declare const Promise: any;