why fetch from react to flask back end not working

                                    Latest update: Sorry about I misunderstood about proxy in nodejs, and fetch() can support this kind of proxy.

//After I do some trial and error, you just need to change you path '/' to '/something_else' and the proxy work well.

//Wrong information:

//This is not issue about python and flask.

//You use fetch() in javascript, and this is native js function, so it is not related with proxy you set in package.json.

//If you want to use fetch() to get other port, you have to give it the whole url http://localhost:5000/ or you will get the same port of you react app.

fetch('http://localhost:5000/')
      .then(response => {
        console.log(response.text()) //Here is the text() i said before
        this.setState({ snippets: response.data })
      })
      .catch(error => {
        console.log(error)
      });