How to upload Blob?

[wotulong]

I try to wrap a audio recoder( react mic) as a dash component, but i down know how to upload the recorded wav file, can anyone help me, thanks. Part of my react.js file as fellow:

[xhluca]

I believe you will get a faster response and better answers from the Dash community if you ask this in https://community.plotly.com/c/dash or StackOverflow. Sharing an entire reproduceable file or repo would also give more details for the community to help you.