[Solved] Identify the error in this code snippet that uses AbortController: const controller = new AbortController(); const signal = controller.signal; fetch('https://example.com', { signal }); controller.... | Node.js

Node.js - Timers and Scheduling

Identify the error in this code snippet that uses AbortController:

const controller = new AbortController();
const signal = controller.signal;

fetch('https://example.com', { signal });
controller.abort();

signal.addEventListener('abort', () => console.log('Fetch aborted'));

ANot passing the signal to fetch options

BCalling abort() before adding the abort event listener

CUsing signal.addEventListener instead of controller.addEventListener

DMissing async/await for fetch

Step-by-Step Solution

Solution:

Step 1: Check event listener timing
The abort event listener is added after calling controller.abort(), so it misses the event.
Step 2: Verify other parts
The signal is correctly passed to fetch, and signal is the right object to listen on. Async/await is optional here.
Final Answer:
Calling abort() before adding the abort event listener -> Option B
Quick Check:
Add event listener before abort() call = A [OK]

Quick Trick: Add abort listener before calling abort() [OK]

Common Mistakes:

Adding listener after abort() call
Listening on controller instead of signal
Forgetting to pass signal to fetch

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More Node.js Quizzes

Identify the error in this code snippet that uses AbortController:

Step 1: Check event listener timing

Step 2: Verify other parts

Final Answer:

Quick Check:

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