JavaScript FrameBuster Snippet

By  on  

Oftentimes you want to make sure your site isn't being IFRAME'd.  Sometimes it's for security reasons, other times it's so your site's content isn't being skimmed else, and other times it's...oh, who cares, you just want to do it.  Here's a short way to escape frames:

if (top.location != self.location) {
    top.location = self.location.href;
}

Uglify this and you get 63 characters of gold.  Simple, effective.

Recent Features

  • By
    9 Mind-Blowing Canvas Demos

    The <canvas> element has been a revelation for the visual experts among our ranks.  Canvas provides the means for incredible and efficient animations with the added bonus of no Flash; these developers can flash their awesome JavaScript skills instead.  Here are nine unbelievable canvas demos that...

  • By
    CSS vs. JS Animation: Which is Faster?

    How is it possible that JavaScript-based animation has secretly always been as fast — or faster — than CSS transitions? And, how is it possible that Adobe and Google consistently release media-rich mobile sites that rival the performance of native apps? This article serves as a point-by-point...

Incredible Demos

  • By
    prefers-color-scheme: CSS Media Query

    One device and app feature I've come to appreciate is the ability to change between light and dark modes. If you've ever done late night coding or reading, you know how amazing a dark theme can be for preventing eye strain and the headaches that result.

  • By
    JavaScript Copy to Clipboard

    "Copy to clipboard" functionality is something we all use dozens of times daily but the client side API around it has always been lacking; some older APIs and browser implementations required a scary "are you sure?"-style dialog before the content would be copied to clipboard -- not great for...

Discussion

  1. Sorry bit of a jacascript noob here – this sounds great but how would one implement it? Where does it go?

    Again apologies for what must sound a simple question.

    • Eric

      Just toss it at the top of your javascript file :). Really anywhere in your JS this would work.

    • Just don’t put it inside a function unless that your intention. For example if for some reason you want to give your users a chance to make sure the page isn’t iframed by clicking a button then you put that code in a function say unIFrameMe() and then call that function when onclick the button.

      In general, you’ll want this code to be outside of a function, so it is run when the js is loaded.

      EMILIO!

  2. Thanks for the answers re the javascript.

    htaccess solutions might be better as they are not so easily bypassed:

    To blocks all sites (including your own) from iframing your pages:

    Header append X-FRAME-OPTIONS "DENY"
    

    or to block any external site from iframing your pages:

    Header append X-FRAME-OPTIONS "SAMEORIGIN"
    
  3. You can also only block some of your urls with the x-frame-options header. Here’s an apache solution

    Header always append X-Frame-Options SAMEORIGIN # Block any site from applying an iframe.

  4. Apparently I didn’t use `pre` tags.

    Header always append X-Frame-Options SAMEORIGIN # Block any site from applying an iframe.
    

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!