animate: function f(e,a,cb){
        if(!f.$disabled){
          D.addClassBriefly(e, a, 0, cb);
        }
        return this;
      }
    };
    if(!D.attr(cs.e.inputField,'contenteditable','plaintext-only').isContentEditable){
      /* Only the Chrome family supports contenteditable=plaintext-only,
    if(D.attr(cs.e.inputField,'contenteditable','plaintext-only').isContentEditable){
      cs.$browserHasPlaintextOnly = true;
    }else{
      /* Only the Chrome family supports contenteditable=plaintext-only */
         but Chrome is the only engine for which we need this flag: */
        D.attr(cs.e.inputField,'contenteditable','true');
      cs.$browserHasPlaintextOnly = false;
      D.attr(cs.e.inputField,'contenteditable','true');
    }
    cs.animate.$disabled = true;
    F.fetch.beforesend = ()=>cs.ajaxStart();
    F.fetch.aftersend = ()=>cs.ajaxEnd();
    cs.pageTitleOrig = cs.e.pageTitle.innerText;
    const qs = (e)=>document.querySelector(e);
    const argsToArray = function(args){

        event.stopPropagation();
        event.preventDefault(true);
        return false;
      }
      /* else continue propagating */
    };
    document.addEventListener('paste', pasteListener, true);
    if(window.Selection && window.Range && !Chat.$browserHasPlaintextOnly){
      /* Acrobatics to keep *some* installations of Firefox
         from pasting formatting into contenteditable fields.
         This also works on Chrome, but chrome has the
         contenteditable=plaintext-only property which does this
    if(0){
      const onPastePlainText = function(ev){
         for us. */
      Chat.inputElement().addEventListener(
        'paste',
        function(ev){
        var pastedText = undefined;
        if (window.clipboardData && window.clipboardData.getData) { // IE
          pastedText = window.clipboardData.getData('Text');
        }else if (ev.clipboardData && ev.clipboardData.getData) {
          pastedText = ev.clipboardData.getData('text/plain');
          if (ev.clipboardData && ev.clipboardData.getData) {
            const pastedText = ev.clipboardData.getData('text/plain');
        }
        ev.target.textContent += pastedText;
        ev.preventDefault();
        return false;
            const selection = window.getSelection();
            if (!selection.rangeCount) return false;
            selection.deleteFromDocument(/*remove selected content*/);
            selection.getRangeAt(0).insertNode(document.createTextNode(pastedText));
            selection.collapseToEnd(/*deselect pasted text and set cursor at the end*/);
            ev.preventDefault();
            return false;
      };
      Chat.e.inputField.addEventListener('paste', onPastePlainText, false);
          }
        }, false);
    }
    const noDragDropEvents = function(ev){
      /* contenteditable tries to do its own thing with dropped data,
         which is not compatible with how we use it, so... */
      ev.dataTransfer.effectAllowed = 'none';
      ev.dataTransfer.dropEffect = 'none';
      ev.preventDefault();