Mozilla

JavaScript Articles

Sort by:

View:

  1. ES6 In Depth: The Future

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Last week’s article on ES6 modules wrapped up a 4-month survey of the major new features in ES6. Read more…

  2. ES6 In Depth: Modules

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. When I started on Mozilla’s JavaScript team back in 2007, the joke was that the length of a Read more…

  3. ES6 In Depth: Subclassing

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Two weeks ago, we described the new classes system added in ES6 for handling trivial cases of object Read more…

  4. ES6 In Depth: let and const

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. The feature I’d like to talk about today is at once humble and startlingly ambitious. When Brendan Eich Read more…

  5. ES6 In Depth: Classes

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Today, we get a bit of a respite from the complexity that we’ve seen in previous posts in Read more…

  6. ES6 In Depth: Proxies

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Here is the sort of thing we are going to do today. var obj = new Proxy({}, { Read more…

  7. ES6 In Depth: Generators, continued

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Welcome back to ES6 In Depth! I hope you had as much fun as I did during our Read more…

  8. Developer Edition 41: View source in a tab, screenshot elements, HAR files, and more

    When we introduced the new Performance tools a few weeks ago, we also talked about how the Firefox Dev Tools team had spent a lot of time focusing on user feedback and what we call ‘polish’ bugs – things reported via our UserVoice feedback channel Read more…

  9. Compacting Garbage Collection in SpiderMonkey

    Overview Compacting is a new feature of our garbage collector, released in Firefox 38, that allows us to reduce external fragmentation in the JavaScript heap. The aim is to use less memory in general and to be able to recover from more out-of-memory situations. So Read more…

  10. ES6 In Depth: Collections

    ES6 In Depth is a series on new features being added to the JavaScript programming language in the 6th Edition of the ECMAScript standard, ES6 for short. Earlier this week, the ES6 specification, officially titled ECMA-262, 6th Edition, ECMAScript 2015 Language Specification, cleared the final Read more…