more safeguards

Author: VeraZab

src/components/widgets/TraceTypeSelector.js

@@ -83,7 +83,7 @@ class TraceTypeSelector extends Component {
     } = this.props;
     const computedValue = traceTypeToPlotlyInitFigure(value);
     if (
-      (type.endsWith('gl') || (!TRACES_WITH_GL.includes(type) && glByDefault)) &&
+      ((type && type.endsWith('gl')) || (!TRACES_WITH_GL.includes(type) && glByDefault)) &&
       TRACES_WITH_GL.includes(computedValue.type) &&
       !computedValue.type.endsWith('gl')
     ) {

src/lib/customTraceType.js

@@ -97,6 +97,6 @@ export function traceTypeToPlotlyInitFigure(traceType, gl = '') {
         type: 'cone',
       };
     default:
-      return {type: traceType};
+      return {type: traceType ? traceType : 'scatter'};
   }
 }