can I catch exception of Iframe in parent window of Iframe

Question

I have an IFrame in a page and IFrame has some JavaScript. At run time JavaScript in IFrame gives exception which i want to catch on parent window. How to do that?

Answer 1

There may be few possible causes for .onError() function not to work it may be because of cross domain URL's for this you should implement a check before actulally laoding the iFrame and for that use

var url = "google.com"
var loading_url = "/empty.html"
document.getElementById("iframe").src = loading_url;
$.ajax({
url: url,
type: 'GET',
complete: function(e, xhr, settings){
     if(e.status === 200){
          document.getElementById("iframe").src = url;
     }
  }
});

This will not work cross domain, the status code is 0 in those cases.

One more thing to check is .onError() handler please check from below sample if it matches your conditions

How can I handle errors in loading an iframe?

There are many other options or tweaks to handle this kind of errors :

if (frameDoc.title == 'title of page after expection occur')

will also do the work using on .onLoad() event of iFrame.