Function hasClass

modules/tinymce/src/core/main/ts/api/dom/DOMUtils.ts:824–830

(elm: string | Element, cls: string)

  };

  const hasClass = (elm: string | Element, cls: string) => {
    const $elm = _get(elm);
    // TINY-4520: DomQuery used to handle specifying multiple classes and the
    // formatter relies on it due to the changes made for TINY-7227
    const classes = cls.split(' ');
    return Type.isNonNullable($elm) && Arr.forall(classes, (c) => Class.has($elm, c));
  };

  const show = (elm: string | Node | Node[]) => {
    run(elm, (e) => Css.remove(SugarElement.fromDom(e), 'display'));