Is there a way to access an iframe's window object from the canvas in FBJS? (facebook)

问题

From the facebook canvas, I need to be able to access an iframe window. Normally you could do this with window.frames, but FJBS doesn't seem to allow access to the window object.

Has anyone figured out how to access window objects?

回答1:

you could try this. Let me know how it works.

var myIframe = document.getElementById('myIframeId');

// could retrieve window or document depending on the browser
// (if FBJS allows it!?)
var myIframeWin = myIframe.contentWindow || myIframe.contentDocument;

if( !myIframeWin.document ) { //we've found the document
    myIframeWin = myIframeWin.getParentNode(); //FBJS version of parentNode
}

回答2:

Browsers handle domain security on the principle of Same Origin Policy

And the laws of cross domain communication

Also you will find an interesting read on the creationg of read-write JS APIs on this blog post http://piecesofrakesh.blogspot.com/2007/11/how-to-build-readwrite-javascript-api.html

来源：https://stackoverflow.com/questions/513800/is-there-a-way-to-access-an-iframes-window-object-from-the-canvas-in-fbjs-fac