AbortController usage

example.js

// See https://dom.spec.whatwg.org/#abortcontroller-api-integration

function getData({signal}) {
    // 1. Let p be a new promise.
    // 4. Return p.
    return new Promise((resolve, reject) => {
        // 2. If options' signal member is present, then:
        if (signal && signal.aborted) {
            // 2. 1. If options' signal's aborted flag is set, then reject p with an "AbortError" DOMException and return p.
            throw new DOMException("Aborted", "AbortError");
        }

        // 3. Run these steps in parallel:
        // 3. 1. Let amazingResult be the result of doing some amazing things.
        const id = setTimeout(() => {
            // 3. 2. Resolve p with amazingResult.
            resolve("data!")
        }, 1000);

        // 2. 2. Add the following abort steps to options’ signal: 
        signal && signal.addEventListener("abort", () => {
            // 2. 2. 1. Stop doing amazing things.
            clearTimeout(id);
            // 2. 2. 2. Reject p with an "AbortError" DOMException.
            reject(new DOMException("Aborted", "AbortError"));
        });
    }); 
}

const controller = new AbortController();

const promise = getData({signal: controller.signal});
controller.abort();