I want to use fetch to request a string from the background api. Is there any way to directly take the string out and assign it to the variable?
my original way of writing is this:

var text = "";
fetch(`http://127.0.0.1:8080/`,{
        method: "GET"
    }).then(res => res.text()).then(
      data => {
            text = data
        }
    )
    

after reading many tutorials online, I have converted the data into strings with .text (). It seems that there is still a problem with writing this. How can I take the results out and assign values to external variables? Please give me your advice.
I want to pass the value to the external text variable.