how to get last selected option in multiple select in javascript

I want to get the last selected <option> in a <select multiple> in javascript not jquery!

I try:

<select multiple="multiple" onchange="changeEvent(this)">

function changeEvent(selectTag) {
    console.log(selectTag.value);
}

I expected to get the last <option> selected

>Solution :

To get all the selected options, use selectedOptions on the selectTag.

For the ‘last’ one pop() the array!

function changeEvent(selectTag) {
    console.log(selectTag.selectedOptions);
}

<select multiple="multiple" onchange="changeEvent(this)">
  <option>foo</option>
  <option>bar</option>
  <option>foobar</option>
</select>