如何启用所有node.js和谐的“进行中”功能？

Question

node --v8-options | grep harmony
  --es_staging (enable all completed harmony features)
  --harmony (enable all completed harmony features)
  --harmony_shipping (enable all shipped harmony fetaures)
  --harmony_modules (enable "harmony modules" (in progress))
  --harmony_regexps (enable "harmony regular expression extensions" (in progress))
  --harmony_proxies (enable "harmony proxies" (in progress))
  --harmony_sloppy_function (enable "harmony sloppy function block scoping" (in progress))
  --harmony_sloppy_let (enable "harmony let in sloppy mode" (in progress))
  --harmony_unicode_regexps (enable "harmony unicode regexps" (in progress))
  --harmony_reflect (enable "harmony Reflect API" (in progress))
  --harmony_destructuring (enable "harmony destructuring" (in progress))
  --harmony_default_parameters (enable "harmony default parameters" (in progress))
  --harmony_sharedarraybuffer (enable "harmony sharedarraybuffer" (in progress))
  --harmony_atomics (enable "harmony atomics" (in progress))
  --harmony_simd (enable "harmony simd" (in progress))
  --harmony_array_includes (enable "harmony Array.prototype.includes")
  --harmony_tostring (enable "harmony toString")
  --harmony_concat_spreadable (enable "harmony isConcatSpreadable")
  --harmony_rest_parameters (enable "harmony rest parameters")
  --harmony_sloppy (enable "harmony features in sloppy mode")
  --harmony_arrow_functions (enable "harmony arrow functions")
  --harmony_new_target (enable "harmony new.target")
  --harmony_object_observe (enable "harmony Object.observe")
  --harmony_spreadcalls (enable "harmony spread-calls")
  --harmony_spread_arrays (enable "harmony spread in array literals")
  --harmony_object (enable "harmony Object methods")

node.js comes with a lot of features that are disabled by default (either because they are still in development or are in staging). The --harmony flag enables all completed features.

How to enable all "in progress" features?

Answer 1

You could have a look at what flags are currently "in progress" with

node --v8-options | grep "in progress"

The output as of this post looks like

--harmony_modules (enable "harmony modules" (in progress))
--harmony_array_includes (enable "harmony Array.prototype.includes" (in progress))
// ...
// (I've removed the other lines, which look like the above)

So you could easily parse it to suit your needs.

On the subject: https://nodejs.org/en/docs/es6/#which-features-are-in-progress

Answer 2

You cannot directly use the " in progress " flag as you use Harmony flag. for Features "in progress" use the "--harmony" flag itself. If you want to know the features in progress run

node --v8-options | grep "in progress"

Most flags when you use the command

node --v8-options | grep harmony

are " in progress ", Unless they are enabled by default. to verify the shipped ones would be to run

node --v8-options | grep -A1 harmony

If the default shows true, then it should work properly