#3701 new
Tom Doan

SCRIPT5007: Unable to get value of the property '1' fix

Reported by Tom Doan | October 30th, 2013 @ 05:36 AM

I just patched a bug that returned "SCRIPT5007: Unable to get value of the property '1': object is null or undefined" on IE8+. Please merge it upstream.

The bug is in this block of code (line ~3160):

    var match = (filter || '').match(/alpha\(opacity=(.*)\)/);
    if (match[1]) return parseFloat(match[1]) / 100;

The problem is that in IE (filter || '') can return "progid:DXImageTransform.Microsoft.Alpha(Opacity=65) in some cases, which results in match = null because the regular expression is case sensitive. If match = null, then of course match[1] would also fail, hence the error.

The fix is to simply add the "i" flag to the regular expression:

    var match = (filter || '').match(/alpha\(opacity=(.*)\)/i);


It appears (filter || '') can also return "progid:DXImageTransform.Microsoft." in certain scenarios, such as when you open, close, then open the login popup again in Magento's one-step checkout extension. To account for such cases, the fix should be revised to this:

    var match = (filter || '').match(/alpha\(opacity=(.*)\)/i);
    if (match && match[1]) return parseFloat(match[1]) / 100;

Comments and changes to this ticket

  • Jason Westbrook
  • jayanthchandra176

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The Prototype JavaScript library.

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