function scan(ids,out){
    document.querySelectorAll("[role=button] a[role=link][href^='/'][aria-haspopup=false]").forEach(function(e){
        var userid="", handle="", name="";

        a= e.attributes["href"];
        if(a){
            handle=a.value.slice(1);
            if(handle.startsWith("search?")) return;
            if(ids[handle]) return; //duplicate
            ids[handle]=1;
        }

        f= e.parentElement.parentElement.querySelector("[data-testid]");
        if(f){
            a= f.attributes["data-testid"];
            if(a){
                m=a.value.match(/(\d+)/);
                if(m) userid=m[1];
            }
        }

        if(e.firstChild && e.firstChild.firstChild)
            name= e.firstChild.firstChild.innerText.replace(/\s/g," ").trim();

        out.push([
            userid,
            handle,
            name,
        ].join("\t"));
    });
}

tmp="";
key="\nwindow.__INITIAL_STATE__ = ";
for(i=0;i<document.scripts.length; i++){
    e=document.scripts[i];
    if(e.text.startsWith(key)) tmp=e.text;
}
path=location.pathname.match(/([^/]+)$/)[1];
if(path=="followers") m=tmp.match(/"normal_followers_count":(\d+),/);
else if(path=="following") m=tmp.match(/"friends_count":(\d+),/);

if(!m){
    console.error("You need to be on your Followers or Following page!");
}
else{
    total=Number(m[1]);
    ids={};
    out=[];
    timerID=setInterval(function(){  //scroll down until all followers/ees are loaded
        scan(ids,out);
        if(out.length >= total){
            //all loaded
            clearInterval(timerID);
            document.body.innerHTML = "";
            p=document.createElement("pre")
            document.body.append(p)
            p.textContent = out.join("\n");
        }
        //keep scrolling, one page at a time
        window.scrollBy(0,window.innerHeight);
    }, 500);
}