Added

• Added root options optsHtml and optsCss, in order to pass them as default to editor.toHtml() and editor.toCss() (eg. used already in the export code and the Storage)
• Added cleanId option to editor.getHtml in order to remove unnecessary IDs (eg. those created automatically)
• Added Component.removeAttributes method
• Added options as a second argument to the Component.components() method
• Added ComponentView.onAttrUpdate callback
• Added component:remove:before event. This allows to put conditions before deleting a component

editor.on('component:remove:before', function(component, remove, opts) {
  if (component.is('my-custom-type')) {
    opts.abort = true; // This will abort the remove
    // Pseudo-code of some modal/dialog
    yourAsyncDialog('Are you sure?', {
      confirmed: () => remove(), // complete the remove
    });
  }
});

Changed

• Skip the CSSRule from the JSON if there is no style
• Avoid rendering content if the component has children components

Fixed

• Fixed useless updates in component.addAttributes
• Defer SelectComponent in order to prevent canvas "freeze" #2692
• Make the Droppable end event more reliable
• Hide toolbars properly
• Pass properly options in setStyle #3176
• Trigger the counter change on text update #3224
• Fixed Sorter errors and moved them in the warning logs
• Avoid dropping non-selectable and non-editable text nodes inside the editor