[javascript] JavaScript DOM: Find Element Index In Container

An example of making an array from HTMLCollection

<ul id="myList">
    <li>0</li>
    <li>1</li>
    <li>2</li>
    <li>3</li>
    <li>4</li>
</ul>

<script>
var tagList = [];

var ulList = document.getElementById("myList");

var tags   = ulList.getElementsByTagName("li");

//Dump elements into Array
while( tagList.length != tags.length){
    tagList.push(tags[tagList.length])
};

tagList.forEach(function(item){
        item.addEventListener("click", function (event){ 
            console.log(tagList.indexOf( event.target || event.srcElement));
        });
}); 
</script>

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