Concat two nodelists

Question

I am trying to concat two nodelists using

var ul   = document.querySelector(\"ul\");
var down = document.getElementsByClassName(\"mobile\")[0];
var ul_child = Ar         


        

Answer 1

You can try converting the two NodeList objects to arrays first. Then calling concat on the results:

// Convert the first list to an array
var ul_list = document.querySelector("ul"),
    ul_children_array = Array.prototype.slice.call(ul_list.children);

// Convert the second list to an array
var down_list = document.getElementsByClassName("mobile")[0],
    down_children_array = Array.prototype.slice.call(down_list.children);

var ul_child_array = Array.prototype.concat.call(ul_children_array, down_children_array);