(javascript) how to i get the ID of an element i've selected?

Question

let's say I selected a bunch of elements by class. how do i find out what the ID is of each of my returned elements?

Answer 1

Access the id property

for (var i = 0; i < elements.length; ++i) {
    elements[i].id
}

or

for (var i = 0; i < elements.length; ++i) {
   elements[i].getAttribute('id');
}

Answer 2

Try this :

 function selectedDivs (theClass) {
             var allHTMLTags=document.getElementsByTagName("div");

            for (i=0; i<allHTMLTags.length; i++) {
            //Get all tags with the specified class name.
            if (allHTMLTags[i].className==theClass) {
            allHTMLTags[i].getAttribute('id');
            }
            }
            }