What APIs and features are not available inside a Web Worker? (e.g., DOM, window, document)

Q: What APIs and features are not available inside a Web Worker? (e.g., DOM, window, document)

Workers run in a separate global scope (`DedicatedWorkerGlobalScope`). They have no access to UI APIs, preventing race conditions with rendering. Available APIs include network, storage, and timers, making them suitable for background processing.

Difficulty: 6/10

Web Workers, Browser APIs, Thread model

Workers cannot access DOM, `window`, `document`, `parent`, `alert`, `localStorage`, or most UI-related APIs. They can use `fetch`, `XMLHttpRequest`, `IndexedDB`, `WebSocket`, `setTimeout`, `navigator`, `location` (read-only), `crypto`, and `Worker` itself.

Workers run in a separate global scope (DedicatedWorkerGlobalScope). They have no access to UI APIs, preventing race conditions with rendering. Available APIs include network, storage, and timers, making them suitable for background processing.

Scenario Questions

0-2 years experience

Follow-up Questions

Difficulty: 6/10

Web Workers, Browser APIs, Thread model

Workers cannot access DOM, `window`, `document`, `parent`, `alert`, `localStorage`, or most UI-related APIs. They can use `fetch`, `XMLHttpRequest`, `IndexedDB`, `WebSocket`, `setTimeout`, `navigator`, `location` (read-only), `crypto`, and `Worker` itself.

Scenario Questions

0-2 years experience

What APIs and features are not available inside a Web Worker? (e.g., DOM, window, document)

Workers cannot access DOM, window, document, parent, alert, localStorage, or most UI-related APIs. They can use fetch, XMLHttpRequest, IndexedDB, WebSocket, setTimeout, navigator, location (read-only), crypto, and Worker itself.

Scenario Questions

Follow-up Questions

What APIs and features are not available inside a Web Worker? (e.g., DOM, window, document)

Workers cannot access DOM, window, document, parent, alert, localStorage, or most UI-related APIs. They can use fetch, XMLHttpRequest, IndexedDB, WebSocket, setTimeout, navigator, location (read-only), crypto, and Worker itself.

Scenario Questions

Follow-up Questions

Workers cannot access DOM, `window`, `document`, `parent`, `alert`, `localStorage`, or most UI-related APIs. They can use `fetch`, `XMLHttpRequest`, `IndexedDB`, `WebSocket`, `setTimeout`, `navigator`, `location` (read-only), `crypto`, and `Worker` itself.

Workers cannot access DOM, `window`, `document`, `parent`, `alert`, `localStorage`, or most UI-related APIs. They can use `fetch`, `XMLHttpRequest`, `IndexedDB`, `WebSocket`, `setTimeout`, `navigator`, `location` (read-only), `crypto`, and `Worker` itself.