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Thread: Ext.Anim run slide causes z-index to grow out of bounds

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  1. #1
    Sencha User
    Join Date
    Feb 2012

    Default Ext.Anim run slide causes z-index to grow out of bounds



    Touch version tested:
    • Touch 2.4.2 rev 571
    Browser versions or Packager version tested against:
    • Chrome
    • Safari

    • Cordova
    Device and OS tested against:
    • Samsung s4
    • iPad
    • iPhone 6s
    What theme are you using for your application:
    • Default
    • This is a duplicate of at least 2 bugs neither of which described the exact problem:
    • When the slide animation runs the Ext.Anim class adds one to the z-index of the current element which when retrieved is a string. The string math operation causes the z-index (retrieved with el.getStyle('z-index')) to grow from 0->1->11->111->1111->11111 etc until reaching the browser limit of 2147483647 (2^31).
    • While easily overlooked this causes serious problems with any modal forms/containers/popups.
    The source I overrode to fix is here: fix I implemented looks like this:
        var currentZIndex = parseInt(el.getStyle('z-index'));
        var zIndex;
        if (isNaN(currentZIndex)) {
            zIndex = 1;
        } else {
            zIndex = currentZIndex + 1;
    Steps to reproduce the problem:
    • Run, {type: 'slide'}); and watch the z-index grow!.
    The result that was expected:
    • That the z-index only grow by 1.
    The result that occurs instead:
    • The z-index grows by nearly multiples of 10.
    The url to fiddle testcase:

  2. #2
    Sencha - Sustaining Engineer tristan.lee's Avatar
    Join Date
    Mar 2015
    Central Ohio


    Thanks for the report! I have opened a bug in our bug tracker.

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