Does JSHint support async/await?

Question

I'm using JSHint for the JavaScript project (with the Visual Studio Code). And in this project I use async / await, which JSHint highlights as errors.

I tried to set up jshint, but the it seems like the maxim version of "esversion" is 6.

Does jshint support async/await yet? If it does, how to turn it on? And if not, are there any workarounds?

Answer 1

Update (july 2018) : Async/await will arrive with the release of JsHint 2.10.0. +info : https://github.com/jshint/jshint/pull/3273

The JSHINT developing community considers that:

• JSHINT should first support all the ES6 syntax before start implementing ES7 features.
• Async Functions are only at stage 1, so the syntax can change a lot

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JSHINT-ESNEXT (PACKAGE)

However, there is an unnoficial JSHINT package, wich contains experimental support for await/async, called JSHINT-ESNEXT.

The author, @marcominetti, used the official JSHint 2.7 Master branch and introduced this ES7 feature, taken from the Seb Vincent esnextnext branch.

Check the Npm Package, and the source in github

Installation: $npm install -g jshint-esnext

Right now (Jul 2017) this is the only decent available approach to support await/async in JSHINT.

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JSHINT IGNORE (DIRECTIVE)

A common suggested workaround or mitigation practice, is using the JSHINT ignore directives.

// Code here will be linted with JSHint.
/* jshint ignore:start */
// Code here will be ignored by JSHint.
/* jshint ignore:end */

Or:

ignoreThis(); // jshint ignore:line

I personally find this mitigation practice, dirty and confusing, when our code has a big amount of async/await references. But more confusing and dirty are the JSHINT warnings and errors ;)

Answer 2

The OP asked it there were any workarounds. It's a kludge, but I've replaced all my 'async' or 'await' with 'async /**/' and 'await /**/'. Then a quick script to swap them into '/*async*/' and '/*await*/' allows me to check with jshint.

It's not pretty, but it feeds the bulldog.

Answer 3

Does jshint support async/await yet?

No, not yet as of early 2017.

It appears that it does not yet support async/await. Folks working on jsHint have decided not to support async/await until standards were in a late stage (having apparently been burned previously by supporting things too early when they were still changing) - though implementations already exist (Babel, nodejs, etc...).

If you follow this jsHint open issue thread, it is still an open issue as of recent comments 7 and 11 days ago.

And if not, are there any workarounds?

As of July 2017, there appears to be a fork of the jsHint code called jshint-esnext that has support for async/await here: https://www.npmjs.com/package/jshint-esnext.

Answer 4

Note: Using the forked JSHINT-ESNEXT package (NPM, and github) as suggested in the "accepted answer" requires the inclusion of the "experimental" option to be set.

/* experimental: [asyncawait] */

or

/* experimental: [asyncawait, asyncreqawait] */

See the source code here for details.