[Solved] jQuery UI 1.10: dialog and zIndex option

I have to make an dialog to apear when an image onclick. The problem is that I have some realy big z-index there (500 for example) and the ui dialog is on the back of that elements.

Here is the page, you need to log in, user: “raducup” and pass:”1″. Another problem is that when I click close ont the dialog, the object desapears.

This is the function I call when a image is click:

function openItem(obiect){
    $( obiect ).css('zIndex',9999);
    $( obiect ).dialog({
        dialogClass: "no-close",
        modal: true,
        draggable: true,
        overlay: "background-color: red; opacity: 0.5",
        buttons: [
                text: "OK",
                click: function() {
                    $( this ).dialog( "close" );
Enquirer: raducup


Solution #1:

You don’t tell it, but you are using jQuery UI 1.10.

In jQuery UI 1.10 the zIndex option is removed:

Removed zIndex option

Similar to the stack option, the zIndex option is unnecessary with a
proper stacking implementation. The z-index is defined in CSS and
stacking is now controlled by ensuring the focused dialog is the last
“stacking” element in its parent.

you have to use pure css to set the dialog “on the top”:

.ui-dialog { z-index: 1000 !important ;}

you need the key !important to override the default styling of the element; this affects all your dialogs if you need to set it only for a dialog use the dialogClass option and style it.

If you need a modal dialog set the modal: true option see the docs:

If set to true, the dialog will have modal behavior; other items on
the page will be disabled, i.e., cannot be interacted with. Modal
dialogs create an overlay below the dialog but above other page

You need to set the modal overlay with an higher z-index to do so use:

.ui-front { z-index: 1000 !important; }

for this element too.

Respondent: Irvin Dominin

Solution #2:

You may want to try jQuery dialog method:

$( ".selector" ).dialog( "moveToTop" );

reference: http://api.jqueryui.com/dialog/#method-moveToTop

Respondent: Alain Gauthier

Solution #3:

Add in your CSS:

 .ui-dialog { z-index: 1000 !important ;}
Respondent: Rajiv007

Solution #4:

There are multiple suggestions here, but as far as I can see the jQuery UI guys have broken the dialogue control at present.

I say this because I include a dialogue on my page, and its semi transparent and the modal blanking div is behind some other elements. That can’t be right!

In the end based on some other posts I developed this global solution, as an extension to the dialogue widget. It works for me but I’m not sure what it would do if I opened a dialogue from within a dialogue.

Basically it looks for the zIndex of everything else on the page and moves the .ui-widget-overlay to be one higher, and the dialogue itself to be one higher than that.

$.widget("ui.dialog", $.ui.dialog,
    open: function ()
        var $dialog = $(this.element[0]);

        var maxZ = 0;
        $('*').each(function ()
            var thisZ = $(this).css('zIndex');
            thisZ = (thisZ === 'auto' ? (Number(maxZ) + 1) : thisZ);
            if (thisZ > maxZ) maxZ = thisZ;

        $(".ui-widget-overlay").css("zIndex", (maxZ + 1));
        $dialog.parent().css("zIndex", (maxZ + 2));

        return this._super();

Thanks to the following, as this is where I got the info from of how to do this:


Respondent: Morvael

Solution #5:

Add this before calling dialog

$( obiect ).css('zIndex',9999);

And remove

 zIndex: 700,

from dialog

Respondent: Rohan Kumar

Solution #6:

moveToTop is the proper way.

z-Index is not correct. It works initially, but multiple dialogs will continue to float underneath the one you altered with z-index. No good.

Respondent: Carlos Saenz

Solution #7:

To sandwich an my element between the modal screen and a dialog, I need to lift my element above the modal-screen, and then lift the dialog above my element.

I had a small success by doing the following after creating the dialog on element $dlg.


Since each dialog has a different starting z-index (they incrementally get larger) I make adjustment a string with a boost value, like this:

const adjustment = "+=99";

However, jQuery just keeps increasing the zIndex value on the modal screen, so by the second dialog, the sandwich no longer worked. I gave up on ui-dialog “modal”, made it “false”, and just created my own modal. It imitates jQueryUI exactly. Here it is:

CoverAll = {};
CoverAll.modalDiv = null;

CoverAll.modalCloak = function(zIndex) {
  var div = CoverAll.modalDiv;
  if(!CoverAll.modalDiv) {
    div = CoverAll.modalDiv = document.createElement('div');
    div.style.background = '#aaaaaa';
    div.style.opacity    = '0.3';
    div.style.position   = 'fixed';
    div.style.top        = '0';
    div.style.left       = '0';
    div.style.width      = '100%';
    div.style.height     = '100%';
  if(!div.parentElement) {
  if(zIndex == null)
    zIndex = 100;
  div.style.zIndex  = zIndex;
  return div;

CoverAll.modalUncloak = function() {
  var div = CoverAll.modalDiv;
  if(div && div.parentElement) {
  return div;
Respondent: IAM_AL_X

Solution #8:

Add zIndex property to dialog object:

 zIndex: 10000
Respondent: TechieBrij

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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