xulsup

#### Checklist - [x] `npm test` passes - [x] tests and/or benchmarks are included - [x] documentation is changed or added - [x] commit message follows commit guidelines #### Affected...

Loader is not in use under the single background color, there may be mixed a variety of background colors. Hence the need for a transparent background, or other colors.

[Bug] occur a reference error when using it with flask_socketio

1

### Describe the bug When I import TTS module to my app.py(see the reproduce code), It will occur a reference error. When I don't import the TTS module, it can...