Microsoft/TypeScript

Unable to access ServiceWorkerGlobalScope via `self.`

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#14,877 opened on Mar 27, 2017

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BugDomain: lib.d.tsHelp Wanted

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Description

Since ServiceWorker related types sit in lib.webworker.d.ts, webworker lib need to be added to tsconfig.json.

{
  "compilerOptions": {
    "lib": [
      "es2017",
      "webworker"
    ]
  }
}

But in current lib.webworker.d.ts, it declare var self: WorkerGlobalScope;, so we can't access ServiceWorkerGlobalScope via self.

TypeScript Version: 2.2.1

Expected behavior:

Can access ServiceWorkerGlobalScope via self.(like self.clients)

Actual behavior:

Access with error.

image

Contributor guide

Research direction
Inspect lib.webworker.d.ts and change the `declare var self: WorkerGlobalScope;` to include ServiceWorkerGlobalScope via a union type like `WorkerGlobalScope | ServiceWorkerGlobalScope`.
Tech stack
typescript
Domain
tooling
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
TypeScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70