Too Long; Didn't Read
If you’ve kept your JavaScript skills up to date, you’ve probably come across ES6 Promises before. Promises provide a clean, flexible way to chain multiple async operations together without having to nest function calls inside callbacks (which might lead to <a href="http://callbackhell.com/" target="_blank">callback hell</a>). Promises can be powerful but if you don’t follow proper error-handling practices, they can make life difficult.