ECMAScript 2017 (ES8): the final feature set

Check out my book (free online): “Exploring ES2016 and ES2017”.

Update 2017-01-29: At the TC39 meeting in January 2017, the last feature of ECMAScript 2017, “Shared memory and atomics” advanced to stage 4. That means that its feature set is now complete, as listed below.

The features of ECMAScript 2017  #

Major new features:

• Async Functions (Brian Terlson)
• Shared memory and atomics (Lars T. Hansen)

Minor new features:

• Object.values/Object.entries (Jordan Harband)
• String padding (Jordan Harband, Rick Waldron)
• Object.getOwnPropertyDescriptors() (Jordan Harband, Andrea Giammarchi)
• Trailing commas in function parameter lists and calls (Jeff Morrison)

FAQ  #

What do the stages mean?  #

They refer to maturity stages in the so-called “TC39 process”. Check chapter “The TC39 process for ECMAScript features” in “Exploring ES2016 and ES2017” for more information.

How is [my favorite proposed feature] doing?  #

If you are wondering what stages various proposed features are in, consult the readme of the ECMA-262 GitHub repository.

Further reading  #

The following books by me are free to read online:

• ECMAScript 5: “Speaking JavaScript”
• ECMAScript 6: “Exploring ES6”
• ECMAScript 2016 & 2017: “Exploring ES2016 and ES2017”
• ECMAScript 2018 & 2019: “Exploring ES2018 and ES2019”