While using cable_ready's addCssClass with an array of class names, the classList of the element(s) are updated incorrectly.
They are updated, but the class names are separated by a comma (,) instead of a space.

Eg:
Using

add_css_class(selector: '#foo', name: ["btn-warning", "pulsating"])

will update the '#foo' element's classList with btn-warning,pulsating instead of btn-warning pulsating

Additional info:
This error message is shown in the console