Safely sandbox and execute user submitted JavaScript?

Question

I would like to have the ability to let users submit arbitrary JavaScript code, which is then sent to a Node.JS server and safely executed before the output is sent back to

Answer 1

One alternative would be to use http://github.com/patriksimek/vm2:

$ npm install vm2

then:

const {VM} = require('vm2');
const vm = new VM();

vm.run(`1 + 1`);  // => 2

as mentioned in comments of other answers.

I don't know how secure it is, but it at least claims that it runs untrusted code securely (in its README). And I couldn't find any obvious security issues so far as solutions suggested in other answers here.