With all the noise about EC6, one thing that I realized I haven't heard about is expanding Javascript's standard library. Javascript has a fairly sparse standard library. You need a 3rd party library to do many basic things like date manipulation.

I'd rather have more built into the browser via a standard library then have to download Javascript to do basic things.

Is this a focus of the standards body? Is it contingent on ES6 modules? Is it even correct to discuss an "Ecmascript standard library" (does the standard specify a std lib like say C++'s spec does) or is it something specific to the Javascript implementation of the Ecmascript standard?


It’s certainly something that’s considered in every standard, but I would say that yes, a more comprehensive standard library is a focus of ES6; comparing it to the changes in every other revision of JavaScript (which have, for the most part, added functions to existing types), you’ll notice that it’s… a lot more. No, the changes are not contingent on modules.

Truly new in ES6 (i.e. not a renamed or improved version of something else):

  • Array.from, Array#fill, Array#find, Array#findIndex
  • Map, WeakMap, and Set types
  • Number.isInteger
  • String.fromCodePoint, String#codePointAt, String#startsWith, String#endsWith, String#contains, String#repeat, String#normalize – lots to do with Unicode, not just UTF-16
  • Object.is, Object.setPrototypeOf, Object.assign, Object.observe
  • Math.imul, Math.clz32, Math.fround – performance things
  • Promise – hugely important for asynchronous code

All in all, several things that would be very nice to have in the JavaScript standard library.

… I would rather have had more of this than modules and other breaking changes.

  • thats all good stuff, I was kind of hoping to start seeing more build out of a standard tools like python's std lib. I'm just imagining how much bandwidth is used to transfer stuff that should just be there – Doug T. Jul 8 '14 at 17:18

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.