JavaScript

Relevant spec sections:

https://drafts.csswg.org/selectors-4/#the-dir-pseudo
https://html.spec.whatwg.org/multipage/semantics-other.html#selector-ltr

The interesting cases to test are from the definition of "directionality" in HTML:
https://html.spec.whatwg.org/multipage/dom.html#the-directionality

• element with dir="ltr" matches :dir(ltr) (#26159)
• root element without `

Hi,

When I use multiple iframe in my web page with pNotify and do submit or a button click in the page, I am getting error "Uncaught TypeError: Cannot read property 'opener' of undefined" in at PNotify.position (pnotify.js:641).

I am getting this error when I am changing a iframe src in a text box change event and do submit the page. This is happening only in Chrome browser.
Please help me

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@iliakan, @lex111, @dandgerson, @stas-dolgachov, @xcurveballx

Учебник переведён и будет скоро опубликован.

Пожалуйста, обратите внимание на #321 и #288.

When you open page UI Elements -> Cards i see TABS are not showing content until you click on other and back on first, same for pills.

Possible fix : ( worked for me )

<script type="text/javascript"> $(document).ready(function(){ $('.nav-item').tab('show'); $('.nav-tabs li a:first').trigger('click'); }); </script>