Does JSHint support async/await?

Solution 1:

Update (February 2019) : Async/await are now supported as of version 2.10.1. Simply update your .jshintrc to use "esversion": 9. (+Info : Version changelog)

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

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.

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 ;)

Solution 2:

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.

Solution 3:

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] */

/* experimental: [asyncawait, asyncreqawait] */

See the source code here for details.