Unable to get the value of Content-Type

[Elssia]

Describe the bug

The header in the axios request interceptor cannot be obtained through the object dot syntax

To Reproduce

No response

Code snippet

let headers = Object.keys(config.headers)  //config.headers -》interceptors.request.use 
    headers.forEach((key)=>{
        console.log(config.headers[key]);
    })

Expected behavior

Get the value of Content-Type "applicat/json"

Axios Version

1.6.7

Adapter Version

No response

Browser

chrome

Browser Version

121

Node.js Version

21

OS

windows11

Additional Library Versions

No response

Additional context/Screenshots

No response