howto: enable ES6 compilation?

[Bruce Lee]

Some of my scripts are written with ES6 syntax, "let" instead of "var".
Example:

let leftLabel = 'hello world';

When I try to start nodebb, using the command:

./nodebb start

It will throw the following exception:

[meta/js] Could not compile nodebb.min.js: Unexpected token: name (leftLabel)

Please advise me how to enable ES6 compilation, thanks!

[yariplus]

The minifier NodeBB currently uses does not support ES6 compilation, you will need to transpile your code into ES5 using Babel.