echoCancelation typo in lib.d.ts, lib.dom.d.ts, lib.es6.d.ts

[mkrymski]

TypeScript Version: 2.2.1 / nightly (2.2.0-dev.201xxxxx)

Code

 private mediaConstraints: MediaStreamConstraints = {
    audio: {
      echoCancellation: true
    }
}

Expected behavior:
Should be compiling correctly

Actual behavior:

I'm having following error:

error TS2322: Type '{ audio: { echoCancellation: boolean; }; }' is not assignable to type 'MediaStreamConstraints'.
Types of property 'audio' are incompatible.
Type '{ echoCancellation: boolean; }' is not assignable to type 'boolean | MediaTrackConstraints'.
Object literal may only specify known properties, and 'echoCancellation' does not exist in type 'boolean | MediaTrackConstraints'.

There is typo in MediaTrackConstraintSet.
echoCancelation?: boolean | ConstrainBooleanParameters;

should be replaced to
echoCancellation?: boolean | ConstrainBooleanParameters;

[mhegazy]

PRs welcomed. You can find more information about contributing lib.d.ts fixes at https://github.com/Microsoft/TypeScript/blob/master/CONTRIBUTING.md#contributing-libdts-fixes.

[iStefo]

+1, would like to create a PR for this but I'm not sure how soon I will find time to do so

Hint: in the meantime, one can disable tsc's warning by casting the constraint to any:

audio: {
  echoCancellation: true
// tslint:disable-next-line:no-any
} as any

Edit: Intermediate progress can be followed here: microsoft/TypeScript-DOM-lib-generator#251

[NaridaL]

Note that this would be fixed by microsoft/TypeScript-DOM-lib-generator#227

[saschanaz]

Seems this has been fixed.

[jakebailey]

Fixed in #22437