oop - Javascript add new order id to each new element -

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sorry english don't how correct ask question!!

i have task list , when add new task ned add smomthing ordinal number each new task

example task 1 have stored var whit id 1,task 2 var id 2 ..... think need use iteration how...? project link

var todolist = function() {    var addnewtask = function() {       var input = document.getelementbyid("taks-input").value,         itemtexts = input,         cola = document.getelementbyid('task-col-a').children.length,         colb = document.getelementbyid('task-col-b').children.length,         taskboks = document.createelement("div");        taskboks.classname = "min-box";        taskboks.innerhtml = '<div class="col-3 chack" id=""><i class="fa fa-star"></i></div><div class="col-8 task-text" id="taskcontent"><p>' + itemtexts + '</p></div><div class="col-1 color"></div>'        if (colb > cola) {         var todolist = document.getelementbyid("task-col-a");       } else {         var todolist = document.getelementbyid("task-col-b");       }       todolist.appendchild(taskboks);     },      addbutton = function() {       var btn2 = document.getelementbyid("add-task-box");       btn2.onclick = addnewtask;     }    addbutton() };  todolist();

just use id="task_' + (taskcount++) + '"

var todolist = function() {   var taskcount = 0    var addnewtask = function() {       var input = document.getelementbyid("taks-input").value,         itemtexts = input,         cola = document.getelementbyid('task-col-a').children.length,         colb = document.getelementbyid('task-col-b').children.length,         taskboks = document.createelement("div");        taskboks.classname = "min-box";        taskboks.innerhtml = '<div class="col-3 chack" id="task_'+(taskcount ++)+'"><i class="fa fa-star"></i></div><div class="col-8 task-text" id="taskcontent"><p>' + itemtexts + '</p></div><div class="col-1 color"></div>'        if (colb > cola) {         var todolist = document.getelementbyid("task-col-a");       } else {         var todolist = document.getelementbyid("task-col-b");       }       todolist.appendchild(taskboks);     },      addbutton = function() {       var btn2 = document.getelementbyid("add-task-box");       btn2.onclick = addnewtask;     }    addbutton() };  todolist();

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