There is also ES-Next, which refers to whatever is the upcoming definition that has not been published yet, as the day of edition, ES-Next would refer to ES10 (ES-2019)

The following is a table about the different versions that have rolled out along the years since JavaScript was first implemented.Īs you can see, starting in 2016, the official naming changed from a number to the year of release. Starting in 2015, ECMAScript gets updates every year around June., but the JS language doesn’t implement the new features until later in the year, depending on the engine or transpiler timeline. While var results in a variable with the surrounding function as its scope, the scope of a variable declared using let is only the block it is in.ECMAScript is the standard definition of the JavaScript language, although it’s not limited to it, and other languages could be created following the standard, without being called JavaScript.Īs the standard for the language, all changes, including new features, API updates, implementation, depends fully in the ES version the language is following. You’re used to declaring variables using var. Most of the code samples come with an external “Run this code” link, so that you can see the code and play with it. If you need to support old versions of browsers that lack many ES6 features, I’ll touch on solutions that might help you start using ES6 today.

Please note that support for these new ECMAScript 6 features is well underway in modern browsers, although support varies. In this article, we’ll discuss a hand-picked selection of ES6 features that you can use in your everyday JavaScript coding. The features have varying degrees of complexity and are useful in both simple scripts and complex applications. It’s the next version of JavaScript, and it has some great new features.

You’ve probably heard about ECMAScript 6 (or ES6) already.

Es6 new features