While ES2015 has introduced many language features that have been on developers’ wish lists for some time, there are some new features that are less well known and understood, and the benefits of which are much less clear — such as symbols. The symbol is a new primitive type, a unique token that’s guaranteed neve...
This article was peer reviewed by Agbonghama Collins and Ryan Chenkie. Thanks to all of SitePoint’s peer reviewers for making SitePoint content the best it can be! Underscore.js is a JavaScript library, written by Jeremy Ashkenas, that provides functional utilities for a variety of use cases that we, as developers, m...
Arrays, and by extension iteration, are fundamental parts to any application. And like the complexity of our applications, how we use them should evolve as we gain access to new tools. New tools, like generators, for instance. First came arrays. Then we gained the ability to define our own array-like things (called ite...
ECMAScript 6 (a.k.a. ECMAScript 2015 or ES6) brings a number of new features to JavaScript which will make the language a good fit for large applications. One of these features is better support for asynchronous programming using promises and generators. Another is the addition of the Fetch API which aims to replace XM...
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