ES6 Compatibility?

[BenDavisson]

According to the readme:

jsmin makes no attempt to be compatible with ECMAScript 6 / ES.next / Harmony

However, you also include:

If you're using jsmin on ES6 code, though, you might find the quote_chars parameter useful:
from jsmin import jsmin with open('myfile.js') as js_file: minified = jsmin(js_file.read(), quote_chars="'\"")

I'm a bit puzzled. Can jsmin handle ES6 by using the referenced quote_chars parameter? Or is it always dangerous to use jsmin on any ES6 code?

I tested it out by including a few features from ES6(arrow functions and Promises) in the javascript file I'm minifying with jsmin.

Everything runs correctly. Could we enhance the readme.md to clarify what is wrong with using jsmin on ES6?

Thanks!