有没有办法将变量赋值给axios请求并在onUploadProgress中访问它

import axios from 'axios';
const instance = axios.create();

const myVariable = 'example value';
instance.defaults.headers.common['My-Variable'] = myVariable;

instance.post('/api/upload', formData, {
  onUploadProgress: function(progressEvent) {
    console.log(instance.defaults.headers.common['My-Variable']);
    // 在这里访问变量值
  }
});