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JavaScript · Class

AbortController

AbortController lets you stop asynchronous operations, such as fetch requests. Pass its signal to an operation, then call abort() to cancel it.

Last updated 2 November 2026

Since: March 2019

Syntax

new AbortController(); controller.signal; controller.abort(reason);

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

AbortSignal
Fetch API
Web Workers

Source: AbortController - Web APIs | MDN. Checked 2026-11-03.