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    You found a bug! We've classified it as EXTJS-8961 . We encourage you to continue the discussion and to find an acceptable workaround while we work on a permanent fix.
  1. #1
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    Default [BUG] Ext.ux.IFrame memory leak

    [BUG] Ext.ux.IFrame memory leak


    In the onLoad function on the iFrame you have
    Ext.EventManager.on(window, 'unload', me.beforeDestroy, me);

    I believe you meant to add the listener to the iframe and not the window, or possibly both. It leaks a listener each time you load a URL when you don't have
    Ext.EventManager.on(me.getWin(), 'unload', me.beforeDestroy, me);

    The window event listener needs to be moved from the onLoad function if it helps with unloads of the window, but if it was meant for the iframe, then it needs to reference the iframe. Or maybe you need to put one on both.

    Relevant code:
    PHP Code:
        onLoad: function() {
            var 
    me this,
                
    doc me.getDoc(),
                
    fn me.onRelayedEvent;
     
            if (
    doc) {
                try {
                    
    Ext.EventManager.removeAll(doc);
     
                    
    // These events need to be relayed from the inner document (where they stop
                    // bubbling) up to the outer document. This has to be done at the DOM level so
                    // the event reaches listeners on elements like the document body. The effected
                    // mechanisms that depend on this bubbling behavior are listed to the right
                    // of the event.
                    
    Ext.EventManager.on(doc, {
                        
    mousedownfn// menu dismisal (MenuManager) and Window onMouseDown (toFront)
                        
    mousemovefn// window resize drag detection
                        
    mouseupfn,   // window resize termination
                        
    clickfn,     // not sure, but just to be safe
                        
    dblclickfn,  // not sure again
                        
    scopeme
                    
    });
                } catch(
    e) {
                    
    // cannot do this xss
                
    }
     
                
    // We need to be sure we remove all our events from the iframe on unload or we're going to LEAK!
                
    Ext.EventManager.on(window'unload'me.beforeDestroyme);
     
                
    this.el.unmask();
                
    this.fireEvent('load'this);
     
            } else if(
    me.src && me.src != '') {
     
                
    this.el.unmask();
                
    this.fireEvent('error'this);
            }
     
     
        }, 

  2. #2
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    Thanks for the report! I have opened a bug in our bug tracker.

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