Using throw inside new Promise()

new-promise-reject.js

new Promise((resolve, reject) => {
    resolve(someArr.map(e => {
        if (e.foo) {
            reject(Error('Found a foo!'));
            // the .map will continue to loop
            // even resolve will still be called although it won't have any more effect
        } 
        return e.bar;
    }));
});

new-promise-throw.js

new Promise(resolve => {
    resolve(someArr.map(e => {
        if (e.foo) {
            throw Error('Found a foo!');
            // .map is aborted, resolve is never actually called, the promise is rejected immediately
        }
        return e.bar;
    }));
});