index.js

import delay from "timeout-as-promise"

(async () => {
    let actions = (new Array(50)).fill(0).map(() => Math.random() * (1000 - 500) + 500);
    let promises = [];

    try {
        actions.forEach(time => promises.push(
            async () => {
                try {
                await delay(0)
                console.log("an action completed");
                }
                catch(err) {
                    console.log(err);
                }
            }
            // .then(() => console.log("an action completed"))
        ));
    }
    catch (err) {
        console.log(err);
    }

    await promises;
})().then(() => console.log("all actions completed"));