You don't need resolve or reject. Just return the promise: .then(val => doSomeStuff()) Thats it. The resulting promise will get resolved/rejected based on t

You don't need resolve or reject. Just return the promise: .then(val => doSomeStuff()) Thats it. The resulting promise will get resolved/rejected based on the return result of doSomeStuff() You can also use throw to reject a promise manually, or return Promise.reject() .then(val => { if (something) return successVal; else throw new Error("Failure"); }); For more complex scenarios where I need the values from previous actions, I like the forgoing the chaining and using a join helper to unwrap any set of promises as needed: let url = getUrl(resource); let data = url.then(url => fetch(url)) let updateData = d => _.assign(d, {field: 'newVal'} let update = join(url, data, (url, data) => sendUpdate(url, updateData(data))