Replacement in JavaScript?

Question

JavaScript

function loadPage() {
    var buk = "zzxxvvbbzz";
    console.log(buk);
    
    var reg=/zz(.*?)zz/g;
    var after = buk.replace(reg, "");
    
    console.log(after);
   }

It works, removes everything, how to remove only the middle zz xxvvbb zz and leave zz?

Answer 1

var after = buk.replace(/(zz)(.*?)(zz)/g, "$1$3");