Does JSHint support async/await?
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 ;)
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.
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.
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.