lastChild not working

Question

I have the following code:

Answer 1

The jQuery way:

// assuming the last child is always a div
var lastcommentq = $('#div > div:last-child').attr('id');

// alternatively
var lastcommentq0 = $('#div').children('div').last().attr('id');

The JavaScript way:

var lastcommentq = document.getElementById('div').lastElementChild.id;

Note that this works in all modern browsers and IE 9+. See lastElementChild on MDN.