video-ad-sdk/dist/adUnit/helpers/dom/waitFor.js

VAST/VPAID SDK that allows video ads to be played on top of any player

import { once } from './once';
export const waitFor = (element, event) => {
    let pending = true;
    let resolvePromise;
    let rejectPromise;
    const promise = new Promise((resolve, reject) => {
        resolvePromise = resolve;
        rejectPromise = reject;
    });
    const cancelOnce = once(element, event, (...args) => {
        pending = false;
        resolvePromise(args);
    });
    const cancel = () => {
        if (pending) {
            pending = false;
            cancelOnce();
            rejectPromise(new Error('waitFor was canceled'));
        }
    };
    return {
        cancel,
        promise
    };
};