ele.classes() getter & aliases

[sjneph]

Allow getting the list of classes on an element as an array, i.e. classArray = ele.classes().

Also allow ele.className() and ele.classNames() as aliases of ele.classes().

OP follows:

--

I find it useful to know which classes might be assigned to a collection. Could you provide a space-separated list method, please? I recommend an implementation similar to the following in classes.js.

  getClasses: function () {
    let ele = this[0];
    return (ele != null)
      ? ele._private.classes.toArray().toString().replace(/,/g, " ")
      : "";
  },

[maxkfranz]

ele.json().classes

[maxkfranz]

See #2019

It would probably be better to support getting/setting arrays with ele.classNames(), since for v4 it's planned to change the default JSON export to use arrays. That way, classNames() is future-proofed and only old things would need to be changed.

el.classNames(['a', 'b']); // set
el.classNames(); // get
el.classNames([]); // clear