Typescript to Javascript

Question

We are converting the existing Javascript to Typescript.

When the Typescript code is compiled to Javascript, there is __extends method call. But there is NO function definition for __extends. So, getting the error as __extends as undefined. I believe __extends will be created in the Javascript file.

Is there any configuration change, that we should do inorder to get the __extends function in the compiled Javascript ?

Please advice and throw some help.

tsconfig.json

{
  "compilerOptions": { 
    "target": "es5", 
    "outDir": "../app/scripts/",
    "rootDir": "./", 
    "watch": false, 
    "removeComments": true, 
    "module": "amd", 
    "noImplicitAny": true,
    "noEmitHelpers": true
  }
}

{ "compilerOptions": { "target": "es5", "outDir": "../app/scripts/", "rootDir": "./", "watch": false, "removeComments": true, "module": "amd", "noImplicitAny": true, "noEmitHelpers": true } } — user2325247
– user2325247, Commented Apr 17, 2016 at 0:55

noppa · Accepted Answer · 2016-04-17 01:03:19Z

1

Based on this TS issue either remove the noEmitHelpers option from tsconfig.json file or provide __extends method yourself.

answered Apr 17, 2016 at 1:03

noppa

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