CORS error while using API in Shopify App

[Muhammad_Mahad]

Hii everyone, 

I created an app through CLI (terminal). Now I am customizing and adding custom files of .jsx to add some custom functionality. I'm using an API to achieve some functionality but when the API is used in code it gives a CORS error.

I also had tried these 

• axios instead of fetch.  
• Updating API headers. 

Is there any solution or suggestion?