how to give a unique id to each input field created with button click

please i have a problem,i create new input field when a button is click,but i want each of the new create field to have a unique id,so i can use it for calculation in javascript.

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 function create(){
 
            var newinput = document.createElement('input');

            newinput.placeholder = "test1";

            newinput.id = 'test1'; 

                document.getElementById("mytest").appendChild(newinput);

            }

May 4 '17 #1

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1659

Dormilich

8,658

Expert Mod 8TB

solution: don't use IDs for your calculation but classes. If you're having an unknown number of input fields, you can't base your calculation on IDs anyways.

May 4 '17 #2

chijioke

but i don't know how to do that can you edit my code and fix it

May 4 '17 #3

Dormilich

8,658

Expert Mod 8TB

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 function create()

{

    var newinput = document.createElement('input');

    newinput.placeholder = "test1";

    document.getElementById("mytest").appendChild(newinput);

}

May 4 '17 #4

jmrker

As 'Dormilich' said, I would not recommend this approach for calculations, but it is not impossible to do and can be done like this...

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<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="UTF-8" />

<title> Create Inputs </title>

</head>

<body>

<button onclick="countThem()">Count Them</button>

<div id="mytest"></div>
 
<script>

function create(xx) {

  var newinput = document.createElement('input');

  newinput.placeholder = "test"+xx;

  newinput.id = 'inp'+xx;

  document.getElementById("mytest").appendChild(newinput);
 
  newinput = document.createElement('br');

  document.getElementById("mytest").appendChild(newinput);
 
}
 
function init() { for (var i=0; i<10; i++) { create(i); } }
 
init();
 
function countThem() {

  var sel = document.querySelectorAll('input');

  var str = '';

  for (var i=0; i<sel.length; i++) { str += sel[i].id+'\n'; }

  alert(sel.length+'\n\n'+str);

}

</script>
 
</body>

</html>

Jun 4 '17 #5

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