问题
Is there a way to prevent the error "This webpage is not available." from displaying within an iframe that displayed on another site?
For example, if I have a website and I want to display my Facebook fans in a box, one way to display it is with an iframe (typically Facebook supplied code). However, if for some reason Facebook is down or slow to respond (like it is right now), I get the following displayed on my website where the iframe should be displayed:
This webpage is not available.
The webpage athttp://www.facebook.com/plugins/likebox.php?id=xxxxxxxxxx&width=182&connections=6&stream=false&header=true&height=287might be temporarily down or it may have moved permanently to a new web address.
• More information on this error Below is the original error message Error 324 (net::ERR_EMPTY_RESPONSE): Unknown error.
If Facebook (or the other website) is not available, I'd be happy not displaying anything, or displaying a graphic of the same size (height/width), or a host of other alternatives EXCEPT displaying an error on my homepage! It makes my site look broken to users.
Any and all ideas are welcome! Thanks in advance
回答1:
You can use the iframe's onerror="" property to do something creative. Consider this:
<iframe src="foo.bar" onerror="this.location.reload();" />
Hope this helps
Edit: This no longer works.
回答2:
If you are doing anything on the server-side you can test that URL and see if it returns a 404 error
来源：https://stackoverflow.com/questions/3552355/prevent-iframe-this-webpage-is-not-available-error-from-displaying-on-website