Fix select options existence predicate #9
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- `$el[0].options` would always evaluate to `true` even if the select object didn't have any option elements. So instead we're checking if the length is truthy. - `selectedIndex` would evaluate to `true` because when there is no selected item `selectedIndex` equals `-1` So in essence, stickit would try to get the current selected option value even though there were no options. This caused an issue on Internet Explorer (tested in IE7 and IE8), where it would fail when stickit tried to access the `selectedIndex` of the select tag's options array.
delambo
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Sep 26, 2012
Fix select options existence predicate
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@hlindset Once again, you have been very detailed and helpful - thank you, kind sir. |
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Hi.
I encountered some issues with Backbone.stickit on Internet Explorer (tried it on IE7 and IE8). Stickit would always try to get the currently selected option of a select input, even if it was empty. Here's what I found:
$el[0].optionswould always evaluate totrueeven if the select object didn't have any option elements. So instead I'm checking if its length is truthy.selectedIndexwould evaluate totrue, because when there is no selected itemselectedIndexequals-1. Instead I'm checking whether or not it's equal or greater than zero.