Question

I have a function which creates a DOM element onClick. That Element contains inputs with array names.

At the start I already have one element (the same like those which I create onClick).

<tbody id="elementsBody">

<tr id="element1"> // 1 becomes 2 and so on when new element is added
  <td>
    <input type="hidden" name="numbers[]" value="1" /> // 1 becomes 2 and so on when new element is added
  </td>
  <td>
    <input type="text" name="titles[]" />
  </td>
</tr>

// Newly created Elements goes in here!!!

</tbody>

This is my function which creates more elements like the one above.

And also creates a Delete Button DIV for this newly created element.

function addElement() {
  var elementsBody = document.getElementById('elementsBody');

  var numbers = document.forms[1].elements['numbers[]'];
  var number = numbers.length+1;

  if (isNaN(number)) {
    var number = 2;
  }

  var numberInput = '<td><input type="hidden" name="numbers[]" value="'+ number + '" /></td>';
  var titleTd = '<td><input type="text" name="titles[]" /></td>';

  // This is the Delete Button DIV
  // I want to create a function (deleteElement) which Removes This Element
  var deleteButton = '<td><div onClick="deleteElement('+ number + ')">Delete Element</div></td>';

  elementsBody.insertAdjacentHTML('beforeend', '<tr id="element' + number + '">' + numberInput + titleTd + deleteButton + '</tr>');
}

I want to create a function (deleteElement) which Removes this Added Element onClick.

After Removing an Element, I want that function to reorder all the elements values and ID’s. For example if I remove the Element number 2, the value and ID of the third Element must become 2.

Not JQuery.

Please Help me with that!

Answer 1

Thanks @Esailija for help! Solution (fiddle):

function addElement() {
  var elementsBody = document.getElementById('elementsBody');

  var numberInput = '<td><input type="hidden" name="numbers[]" value="" /></td>';
  var titleTd = '<td><input type="text" name="titles[]" /></td>';
  var deleteButton = '<td><div onClick="this.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode); update();">Delete Element</div></td>';

  elementsBody.insertAdjacentHTML('beforeend', '<tr>' + numberInput + titleTd + deleteButton + '</tr>');
  update();


}

function update() {
  var inputs = document.getElementById('elementsBody').querySelectorAll("input[type='text']");
  [].forEach.call(inputs, function(input, index) {

    input.value = index + 1;
  });
}

<table>
  <tbody id="elementsBody">

    <tr>
      <td>
        <input type="hidden" name="numbers[]" value="1" />
      </td>
      <td>
        <input type="text" name="titles[]" />
      </td>
    </tr>



  </tbody>
</table><button onclick="addElement();">add</button>