What is jshint referring to with ES8 and ES9?

Question

Obviously these are two versions of JavaScript but a Google of ES9 does not pull up anything except this:

medium - es 2018 which gives practical uses of es 2018.

Is es - 2018 referring to ES8 or ES9?

Where can I find some info on practical uses of ES9?

jshint clearly shows that you can configure for ES8 or ES9 here - jshint - options - esversion

See also [here](https://stackoverflow.com/a/56744386/1048572) for a bit of history. — Bergi, Jul 05 '19 at 12:12

Snow · Answer 1 · 2019-07-04T21:01:22.290

1

ES6 = ES2015

ES7 = ES2016

ES8 = ES2017

ES9 = ES2018

A new specification comes out each year (since then), so ES9 is ES2018, which includes Promise.finally, object rest/spread, regex named capture groups, regex lookbehind, regex s (dotall) flag, and a few other things.

ECMAScript 2018 introduced support for asynchronous iteration via the AsyncIterator protocol and async generators. It also included four new regular expression features: the dotAll flag, named capture groups, Unicode property escapes, and look-behind assertions. Lastly it included rest parameter and spread operator support for object properties.

There are descriptions of ES2018 features all over:

https://www.google.com/search?q=es2018+features

Here's one link:

https://www.sitepoint.com/es2018-whats-new/

You can read the official specification for it here:

https://www.ecma-international.org/ecma-262/9.0/

edited Jul 04 '19 at 21:01

answered Jul 04 '19 at 20:40

Snow

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ES* = something to blog about each year, ES35 = Plz no more sugar! – Lawrence Cherone Jul 04 '19 at 20:47
Interesting how the last digit is off by 1. Seems like a good way to remember from ES6 to ES9, 2015 to 2018. When is 2019 due? – Jul 04 '19 at 20:58
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@DaraKhosrowshahi It's already out. See https://www.ecma-international.org/ecma-262/10.0/ – Snow Jul 04 '19 at 21:00
Why is it not in your list as ES10? – Jul 04 '19 at 21:07
@DaraKhosrowshahi I thought the pattern was clear already. There's also ES5, ES3, ES2, ES1 – Snow Jul 04 '19 at 21:13

What is jshint referring to with ES8 and ES9?

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