Keras save model and tfjs model

Hi evereyone, i face issued after keras model converted into tesorflow js, when i tried fetch model.json , got error ,

Did you follow the instructions mentioned
Importing a Keras model into TensorFlow.js.

Provide the error that you are getting.

actually i am not good in cors , if you have any great source to learn CORS please give me

Check my other reply here for some links and explanation of CORS: