sometimes when saving statements on test.wikidata, I get a js error:
jquery.wikibase.edittoolbar.js?645d4:363 Uncaught TypeError: Cannot read property 'option' of undefined
the error comes from:
subToolbar.option( '$content', this.getButton( 'edit' ).element );
in:
/**
* Switches the toolbar to non-edit mode displaying the "edit" button.
*/
toNonEditMode: function() {
if ( !this._isInEditMode() ) {
return;
}
if ( this._$tooltipAnchor ) {
this._$tooltipAnchor.detach();
}
var $subToolbar = this.getContainer().children( ':wikibase-toolbar' ),
subToolbar = $subToolbar.data( 'toolbar' );
subToolbar.option( '$content', this.getButton( 'edit' ).element );
this.getContainer().removeClass( this.widgetBaseClass + '-ineditmode' );
},