did not add / es-shims/Promise.prototype.finally

for cases where finally cannot be used, it can be solved by polyfill, which is also applicable in fast applications. There are many existing methods, and a relatively simple one is introduced. The code is as follows:

Promiseresolvereject2
function fetchData(){
    fetch.fetch({
      url: params.url,
      method: params.method,
      data: params.data
    })
    .then(response => {
      // success
      return Promise.resolve(response);
    })
    .catch((error, code) => {
      console.log(`request fail, code = ${code}`);
      // err
      return Promise.reject(error);
    })
}
 then call to execute the code you want in finally regardless of success or failure 
fetchData().then(res => {
    // when success
    // do final
}).catch(err => {
    // when error
    // do final
})