Concatenating html object arrays with javascript -

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i'm attempting merge 2 arrays made of html objects. reason using .concat() not work me.

here's simple pen demonstrate problem: http://codepen.io/anon/pen/kieyb

note: tried searching remotely similar found nothing answered question.

i figure can ole fashion way using for-loops rather not re-invent wheel.

var x = document.getelementbyid("hello"); var items = x.getelementsbyclassname("one"); //alert(items.length); var items2 = x.getelementsbyclassname("two"); //alert(items2.length); items = items.concat(items2); //alert(items.length);

items , items2 nodelist or htmlcollection objects, not arrays. not contain .concat() method. have .length property , support [x] indexing, not have other array methods.

a common workaround copy them actual array follows:

// convert both arrays have full complement of array methods var array1 = array.prototype.slice.call(x.getelementsbyclassname("one"), 0); var array2 = array.prototype.slice.call(x.getelementsbyclassname("two"), 0);

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