How to tell/change version of javascript on nodejs Linux

Question

FYI:I have never worked on NodeJS before I have a small nodejs(5.2) scriptlet and while trying to run it I get this error. It looks like it is because an older javascript runtime/interpreter is being used as it is not picking up the three dot notation. How do I check the version of ES/Javascript and install and switch to ES6 on my system (Fedora 23).

/usr/lib/node_modules/canvas-data-cli/lib/logger.js:17 logIt(level, ...args) { ^^^

SyntaxError: Unexpected token ... at exports.runInThisContext (vm.js:54:16) at Module._compile (module.js:375:25) at Object.Module._extensions..js (module.js:406:10) at Module.load (module.js:345:32) at Function.Module._load (module.js:302:12) at Module.require (module.js:355:17) at require (internal/module.js:13:17) at Object. (/usr/lib/node_modules/canvas-data-cli/lib/cli.js:4:14) at Module._compile (module.js:399:26) at Object.Module._extensions..js (module.js:406:10)

I know the node version. I dont know how to check javascript/ES version and how to change it to ES6 — Fahad Bukhari
– Fahad Bukhari, Commented Dec 16, 2015 at 23:04

MinusFour · Accepted Answer · 2015-12-16 22:55:28Z

3

To check node version:

node -v

I suggest you use nvm to manage node versions.

From its github readme page:

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.29.0/install.sh | bash
nvm install 5.2
nvm use 5.2

And then you can just use node as normal, it will be 5.2.

answered Dec 16, 2015 at 22:55

MinusFour

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TbWill4321 · Accepted Answer · 2015-12-16 22:55:30Z

1

Node 5 does not support rest operators yet, without a specific runtime flag.

You can check support tables for your version at: https://kangax.github.io/compat-table/es6/#test-rest_parameters_basic_functionality

answered Dec 16, 2015 at 22:55

TbWill4321

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Shawn Hartsell · Accepted Answer · 2015-12-17 01:09:50Z

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If you don't want to worry about knowing which versions of node support native ES6 capabilities look into using Babel to transpile your code. You can take advantage of ES7 features as well.

answered Dec 17, 2015 at 1:09

Shawn Hartsell

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