Sort a list by id by using javascript [duplicate]

Answer 1

The comparison function must return an integer. sort checks whether it's negative, zero, or positive, and uses that to determine how the two elements should be ordered. So do:

elems.sort(function(a, b) {
    return a.id - b.id;
});

Or, in modern ES6 style:

elems.sort((a, b) => a.id - b.id);