What version of Javascript is supported in node.js

Question

I\'m getting started with Node.js and I\'m having a hard time figuring out what version of JavaScript is supported by node which makes it difficult figuring out what feature

Answer 1

It seems as though we have been reduced to two strategies to figure out which version of Javascript node uses:

Strategy 1: trust in what some document somewhere says, which is wrong in many cases. I haven't found the table which indicates the key-value pairs of which version of node supports which version of ECMAScript.

Strategy 2: guess-and-check.

Find a feature quoted by ES6 and "see if it fails", something like this:

el@apollo:~/code$ echo "console.log('blue'.includes('blue'))" > a.js
el@apollo:~/code$ cat a.js 
console.log('blue'.includes('blue'))
el@apollo:~/code$ node a.js
/home/el/code/javascript/02/a.js:1
ports, require, module, __filename, __dirname) { console.log('blue'.includes('
                                                                    ^
TypeError: undefined is not a function
    at Object. (/home/el/code/javascript/02/a.js:1:82)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Function.Module.runMain (module.js:501:10)
    at startup (node.js:129:16)
    at node.js:814:3
el@apollo:~/code$ babel-node a.js
true

I suppose the "babel" here is a reference to the Tanakh. What features does our version of node support? Well, I don't know, you'll have to manually test it. This is going to become a giant MESS. And worse, it seems to be on purpose.