fetching textfile to lines with javascript - how to assign a variable from promise

Question

I am trying to fetch a textfile from my server. The textFile contains image paths with which I want to make a gallery.

This code works and sows the image callery in console:

function loadGallery() {
    const url = "/products/nfts/filelist.txt"
    fetch(url)
    .then( response => response.text())
    .then( text => text.replace("\r", ""))
    .then( cleaned => cleaned.split("\r"))
    .then( array => console.log(array));
}

this code doesnt, it tells me the variable imagelist is undefined:

let imagelist;
function loadGallery() {
    const url = "/products/nfts/filelist.txt"
    fetch(url)
    .then( response => response.text())
    .then( text => text.replace("\r", ""))
    .then( cleaned => cleaned.split("\r"))
    .then( array => (imagelist=array));
    console.log(imagelist);
}

please help me on how to assign this variable.

---

Update: I found out that console.log will find an assigned imagelist once i trigger it from a button manually later on:

function getImages(){
    console.log(imagelist);
}

so I think its loading asynchronous. How do I wait for the fetch completion?

the following code is not working either:

let imagelist;

function loadGallery() {
    const url = "/products/nfts/filelist.txt"
    fetch(url)
    .then( response => response.text())
    .then( text => text.replace("\r", ""))
    .then( cleaned => cleaned.split("\r"))
    .then( array => (imagelist=array))
    .then(getImages());
}
function getImages(){
    console.log(imagelist);
}