CODEWITHSUNDEEP
javascriptdynamic
akemedis
akemedis

Reputation: 474

How do you print out the index of a list element in an ordered list?

I have this code that on a button click, it spawns a group of elements inside a list. each of this groups is indexed in the ordered list in ascending order 1,2,3 etc.. i need these numbers to be stored for use in my database. currently I haven't been able to find a way to identify the index number of each group in the list and thus add them as attributes. This is my JS for spawning a group:

function spawnSilly() //spawn chapters function
        {
            var div = document.createElement("LI");
            var input = document.createElement("INPUT");
            var button = document.createElement("BUTTON");
            var del_button = document.createElement("BUTTON")
            input.setAttribute("type", "text");
            input.setAttribute("placeholder", "Title");
            input.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            button.setAttribute("type", "button");
            button.setAttribute("onClick", "redirect()");
            button.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            button.innerHTML = "Edit";
            div.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            del_button.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            del_button.innerHTML = "Delete";
            del_button.setAttribute("onClick", "removeElement(this.id)")
            div.appendChild(input)
            div.appendChild(button)
            div.appendChild(del_button);

            var list = document.getElementById("spawnList");
            list.insertBefore(div, list.childNodes[0]);
            set_index();
        }

I've been using this JS code to add an index, but I cannot tell if it's working as I cant print out the index of a spawned list element.

function set_index()
        {
            var ol = document.getElementById('spawnList');

            // select the list items
            var lists = ol.getElementsByTagName('li');

            var l = lists.length; // total items
            //custom list id's via loop
            for (var i=1;i<=l;i++)
            {
            list[i].index = i;
            }

        }

This is my HTML:

<ol id="spawnList">


    </ol>
    <button id="spawnbtn" onClick="spawnSilly(); ">Add</button>

This is really bugging me, any help would be fantastic! Thanks :)

Upvotes: 0

Views: 123

Answers (1)

Hien Nguyen
Hien Nguyen

Reputation: 18973

I change way to add li tag in ol tag and it show index.

var list = document.getElementById("spawnList");         

  list.appendChild(div);


var index = 1;
function spawnSilly() //spawn chapters function
        {
            var div = document.createElement("LI");
            var input = document.createElement("INPUT");
            var button = document.createElement("BUTTON");
            var del_button = document.createElement("BUTTON")
            input.setAttribute("type", "text");
            input.setAttribute("placeholder", "Title");
            input.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            button.setAttribute("type", "button");
            button.setAttribute("onClick", "redirect()");
            button.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            button.innerHTML = "Edit";
            div.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            del_button.setAttribute("id", "var timestamp = new Date().getUTCMilliseconds();")
            del_button.innerHTML = "Delete";
            del_button.setAttribute("onClick", "removeElement(this.id)")
            div.appendChild(input)
            div.appendChild(button)
            div.appendChild(del_button);

            var list = document.getElementById("spawnList");
            
            //var li = document.createElement("li");
            
  
  list.appendChild(div);
            console.log(index++);
            //list.insertBefore(div, list.childNodes[0]);
            //set_index();
        }

function set_index()
        {
            var ol = document.getElementById('spawnList');

            // select the list items
            var lists = ol.getElementsByTagName('li');
            if(lists != undefined){
              var l = lists.length; // total items
            //custom list id's via loop
            for (var i=1;i<=l;i++)
            {
            list[i].index = i;
            }
            }

          

        }
<ol id="spawnList">


    </ol>
    <button id="spawnbtn" onClick="spawnSilly(); ">Add</button>

Upvotes: 0

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