No matter how much experience you have with JavaScript, you don't fully understand the language. Part of the "You Don't Know JS" series, this short guide focuses on new features available in ECMAScript 6 (ES6), the latest version of the standard on which JavaScript is built.Like the other books in this series, You Don't Know JS: ES6 and Beyond dives into the more difficult parts of the language that many JavaScript programmers either avoid or know nothing about. Armed with this knowledge, you can achieve true JavaScript mastery.With this book you will:Learn the new ES6 syntax that alleviates the pain points of common programming idiomsOrganize code with iterators, constructors, modules, and classesFast asynchronous flow control with Promises combined with generatorsUse collections to work more efficiently with data in structured waysLeverage new API helpers like Array, Object, Math, Number and StringExpand your program's capabilities through metaprogrammingPreview features probably coming to JS beyond ES6