message: fix(Display): fix Display Preview param polling bug
diff: @@ -301,7 +301,7 @@ export class Preview extends React.Component<IPreviewProps, IPreviewStates> {
  const view = widget && bizlogics.find((b) => b.id === widget.viewId)
  const layerId = layer.id
  - const { polling, frequency } = layer.params
  + const { polling, frequency } = JSON.parse(layer.params)
  const { datasource, loading, interactId, rendered, renderType } = currentLayersInfo[layerId]
  return (
  