Unable to access ServiceWorkerGlobalScope via `self.` · Microsoft/TypeScript#14877

(42 comments) (63 reactions) (0 assignees)TypeScript (48,455 stars) (6,726 forks)batch import

BugDomain: lib.d.tsHelp Wanted

説明

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.

技術スタック: typescript
領域: frontendtooling
Issue 種別: bug
難度: 3
推定時間: 1-3 hours
活動状況: stale
明確さ: clear
前提条件: TypeScript basicsService Worker APIlib declaration files
初心者向け度: 30
調査方針: The issue requests that `self` in `lib.webworker.d.ts` should be of type `ServiceWorkerGlobalScope` instead of just `WorkerGlobalScope` when the `webworker` lib is used. To fix, locate the declaration `declare var self: WorkerGlobalScope;` in `lib.webworker.d.ts` and change it to a proper conditional type or an overload that covers `ServiceWorkerGlobalScope`. Check the current version of the file to see if any changes have been made. Also review the discussion in the issue comments for any proposed approaches or objections. Note that TypeScript's lib files are auto generated, so a fix might need to be done in the upstream source.