Receiving TS2304: Cannot find name 'File' | TS2304: Cannot find name 'ReadableStream' when running "npm run tsc" command - node.js

Question

I have a nodejs application using "watson-developer-cloud" module. Included this module using "npm install --save watson-developer-cloud".
I see the issue below when running "npm run tsc".
node_modules/ibm-cloud-sdk-core/lib/content-type.d.ts(4,35): error TS2304: Cannot find name 'File'.
node_modules/ibm-cloud-sdk-core/lib/content-type.d.ts(4,42): error TS2304: Cannot find name 'ReadableStream'.
I am running this on Mac.
node version 10.15.3.
I found few articles asking to set path to node bin directory and reload terminal.
I did that - although running into the same problem again.
node_modules/ibm-cloud-sdk-core/lib/content-type.d.ts(4,35): error TS2304: Cannot find name 'File'.
node_modules/ibm-cloud-sdk-core/lib/content-type.d.ts(4,42): error TS2304: Cannot find name 'ReadableStream'.
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! my-program#1.0.0 tsc: `tsc`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the my-program#1.0.0 tsc script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2019-03-25T14_29_06_333Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! my-program#1.0.0 build: `npm run tsc && npm run tslint`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the my-program#1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2019-03-25T14_29_06_351Z-debug.log
ERROR: Service 'my-program' failed to build: The command '/bin/sh -c npm run build' returned a non-zero code: 2```

Answer 1

The File and ReadableStream types are defined in the dom TypeScript library.
Try adding it to your tsconfig.json:
{
...
"compilerOptions": {
"lib": [
...
"dom"
]
}
}