jQuery insert div as certain index

Question

Say I have this:

 
1
 
2

bu

Answer 1

You could always use prepend('#div');

ex.

$(document).ready(function(){

$('#first').prepend('<div id="new">New</div>');

});​

That would put "#new" before "#first" Not sure if that's what you want.

Answer 2

This one works best for me,

function SetElementIndex(element, index) {
            var Children = $(element).parent().children();
            var target = Children[index];

            if ($(element).index() > index) {
                if (target == null) {
                    target = Children[0];
                }
                if (target != element && target != null) {
                    $(target).before(element);
                }
            } else {
                if (target == null) {
                    target = Children[Children.length - 1];
                }
                if (target != element && target != null) {
                    $(target).after(element);
                }

            }
        };

Answer 3

//jQuery plugin insertAtIndex included at bottom of post   

//usage:
$('#controller').insertAtIndex(index,'<div id="new">new</div>');

//original:
<div id="controller">
  <div id="first">1</div>
  <div id="second>2</div>
</div>

//example: use 0 or -int          
$('#controller').insertAtIndex(0,'<div id="new">new</div>');
  <div id="controller">
    <div id="new">new</div>
    <div id="first">1</div>
    <div id="second>2</div>
  </div>

//example: insert at any index     
$('#controller').insertAtIndex(1,'<div id="new">new</div>');
     <div id="controller">
        <div id="first">1</div>
        <div id="new">new</div>
        <div id="second>2</div>
     </div>

//example: handles out of range index by appending        
$('#controller').insertAtIndex(2,'<div id="new">new</div>');
      <div id="controller">
          <div id="first">1</div>
          <div id="second>2</div>
          <div id="new">new</div>
      </div>

/**!
 * jQuery insertAtIndex
 * project-site: https://github.com/oberlinkwebdev/jQuery.insertAtIndex
 * @author: Jesse Oberlin
 * @version 1.0
 * Copyright 2012, Jesse Oberlin
 * Dual licensed under the MIT or GPL Version 2 licenses.
*/

(function ($) { 
$.fn.insertAtIndex = function(index,selector){
    var opts = $.extend({
        index: 0,
        selector: '<div/>'
    }, {index: index, selector: selector});
    return this.each(function() {
        var p = $(this);  
        var i = ($.isNumeric(opts.index) ? parseInt(opts.index) : 0);
        if(i <= 0)
            p.prepend(opts.selector);
        else if( i > p.children().length-1 )
            p.append(opts.selector);
        else
            p.children().eq(i).before(opts.selector);       
    });
};  
})( jQuery );

Answer 4

If you need to do this a lot, you can wrap it in a little function:

​var addit = function(n){
  $('#controller').append('<div id="temp">AAA</div>')
    .stop()
    .children('div:eq('+n+')')
    .before( $('#temp') );
} 

addit(2); // adds a new div at position 2 (zero-indexed)
addit(10); // new div always last if n greater than number of divs
addit(0); // new div is the only div if there are no child divs

If you're concerned about that temporary ID, you can add a final step to remove it.

Edit: Updated to handle cases of zero children, and specified n > current number of divs.

Answer 5

I had a similar problem. Unfortunately none of the solutions worked for me. So I coded it this way:

jQuery.fn.insertAt = function(index, element) {
  var lastIndex = this.children().size();
  if (index < 0) {
    index = Math.max(0, lastIndex + 1 + index);
  }
  this.append(element);
  if (index < lastIndex) {
    this.children().eq(index).before(this.children().last());
  }
  return this;
}

Examples for the problem:

$("#controller").insertAt(0, "<div>first insert</div>");
$("#controller").insertAt(-1, "<div>append</div>");
$("#controller").insertAt(1, "<div>insert at second position</div>");

Here are some examples taken from my unittests:

$("<ul/>").insertAt(0, "<li>0</li>");
$("<ul/>").insertAt(0, "<li>0</li>").insertAt(1, "<li>1</li>");
$("<ul/>").insertAt(-1, "<li>-1</li>");
$("<ul/>").insertAt(-1, "<li>-1</li>").insertAt(0, "<li>0</li>");
$("<ul/>").insertAt(0, "<li>0</li>").insertAt(-1, "<li>-1</li>");
$("<ul/>").insertAt(-1, "<li>-1</li>").insertAt(1, "<li>1</li>");
$("<ul/>").insertAt(-1, "<li>-1</li>").insertAt(99, "<li>99</li>");
$("<ul/>").insertAt(0, "<li>0</li>").insertAt(2, "<li>2</li>").insertAt(1, "<li>1</li>");
$("<ul/>").insertAt(0, "<li>0</li>").insertAt(1, "<li>1</li>").insertAt(-1, "<li>-1</li>");
$("<ul/>").insertAt(0, "<li>0</li>").insertAt(1, "<li>1</li>").insertAt(-2, "<li>-2</li>");
$("<ul/>").insertAt(0, "<li>0</li>").insertAt(1, "<li>1</li>").insertAt(-3, "<li>-3</li>");
$("<ul/>").insertAt(0, "<li>0</li>").insertAt(1, "<li>1</li>").insertAt(-99, "<li>-99</li>");

Edit: It handles all negative indizes gracefully now.

Answer 6

Use .insertAfter():

$('<div class="new">').insertAfter($('div.first'));