How to set ‘X-Frame-Options’ on iframe?

You can’t set X-Frame-Options on the iframe. That is a response header set by the domain from which you are requesting the resource (google.com.ua in your example). They have set the header to SAMEORIGIN in this case, which means that they have disallowed loading of the resource in an iframe outside of their domain. For more information see The X-Frame-Options response header on MDN. A … Read more

How to create a stopwatch using JavaScript?

You’ll see the demo code is just a start/stop/reset millisecond counter. If you want to do fanciful formatting on the time, that’s completely up to you. This should be more than enough to get you started. This was a fun little project to work on. Here’s how I’d approach it  Run code snippetExpand snippet Get some basic … Read more

jQuery preventDefault() not triggered

Update And there’s your problem – you do have to click event handlers for some a elements. In this case, the order in which you attach the handlers matters since they’ll be fired in that order. Here’s a working fiddle that shows the behaviour you want. This should be your code: Note that the order of attaching the handlers has been … Read more

Mismatched anonymous define() module

Like AlienWebguy said, per the docs, require.js can blow up if You have an anonymous define (“modules that call define() with no string ID“) in its own script tag (I assume actually they mean anywhere in global scope) You have modules that have conflicting names You use loader plugins or anonymous modules but don’t use require.js’s optimizer … Read more