[CLOSED] [#632] JavaScript runtime error: Expected ']' in ext.axd

**matt** · Jan 06, 2015, 6:57 PM

Hi,

You are right Vladimir, I am not that worried about that now.
From my experience in .NET (I don't know how about JavaScript as I started few months ago) exception handling doesn't have the best performance.

In this case constant throw-catch might not be the best thing. e.g. I have now counted around 2000 try-catch calls (logged exceptions) in my application started just before replaying to this thread.

**Vladimir** · Jan 06, 2015, 7:09 PM

Yes, you are right exception throwing is quite expensive operation (performance)

I have now counted around 2000 try-catch calls (logged exceptions) in my application started just before replaying to this thread.

Do you mean 2000 exceptions in that exactly try/catch block (in Ext.net.getEl)? If yes then can you provide test case when exception is thrown in that block

**matt** · Jan 06, 2015, 7:24 PM

Test case might have to do with environment and versions.
Please see my version in previous replies. (Win 8.1pro, VS2013, IE11)

This happens when I run just a plain code like that:

<%@ Page Language="C#" %>
<!DOCTYPE html>

<html>
<head runat="server">
	<title>Ext.NET v3 Example</title>
</head>
<body>
	<form runat="server">
		<ext:ResourceManager runat="server"/>
	</form>
</body>
</html>

That's the result... more or less... The method Peter mentioned earlier is called constantly and always throw exception when 'eval' is executed.

The "try-catch" in that particular method looks like a "quick patch" for something.

Thank you

**Vladimir** · Jan 06, 2015, 9:01 PM

Thanks for the report, it will be fixed in next release
For now please use

<script>
        Ext.net.getEl = function (el, skipDeep) {
            if (Ext.isEmpty(el, false)) {
                return null;
            }


            if (el.isComposite) {
                return el;
            }


            if (el.getEl) {
                return el.getEl();
            }


            if (el.el) {
                return el.el;
            }


            var cmp = Ext.getCmp(el),
                tEl;


            if (!Ext.isEmpty(cmp)) {
                return cmp.getEl();
            }


            if (Ext.validIdRe.test(el)) {
                tEl = Ext.get(el);
            }            


            if (Ext.isEmpty(tEl) && skipDeep !== true) {
                try {
                    tEl = Ext.get(el);
                    if (tEl && tEl.dom) {
                        return tEl;
                    }


                    return Ext.net.getEl(eval("(" + el + ")"), true);
                } catch (e) { }
            }


            return tEl;
        };
    </script>

**matt** · Jan 06, 2015, 9:18 PM

Thank you. The patch works.

Looking forward for the new release.

**Daniil** · Jan 07, 2015, 5:20 PM

Created an Issue.
https://github.com/extnet/Ext.NET/issues/632

The fix has been committed in the revision 6243 (trunk). It goes to 3.1.

Please update and retest.

Again thank you for the report!

**matt** · Jan 07, 2015, 6:24 PM

Removed the Vladimir's patch from my code. Downloaded and compiled last trunk.

I confirm, the bug is fixed.

Thank you

Thread: [CLOSED] [#632] JavaScript runtime error: Expected ']' in ext.axd

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