promise.js

let rootPromise = new Promise((resolve, reject) => reject('Bad promise'));

rootPromise
    .then(_ => {
        console.log("Promise resolved");
        return Promise.resolve(30);
    }, error => {
        console.log("Error", error);
        // return Promise.resolve(55); // prints Result 55
        return Promise.reject(44); // prints Catch 44
        // throw new Error("exception"); // prints Catch exception
    })
    .then(result => {
        console.log("Result", result);
        return Promise.resolve();
    })
    .catch(error => {
        console.log("Catch", error.message || error);
        console.log("----");
        return Promise.resolve();
    })