jQuery str.replace无法正常工作

Question

I need to search for a string (video embed url) once the page loads and replace the & with & . This is the best guess for code that I have tried but it seems to just have no effect:

(function ($, document, undefined) {
    $(document).ready(function(){
        var str = $( "iframe" ).attr( "src" );
        str = str.replace(/&/g,"&");
        $( "iframe" ).attr( "src",str );
    });
})(jQuery, document);

There is only once iframe on the page and it looks like this:

<iframe src='http://player.vimeo.com/video/72874423?title=0&byline=0&portrait=0;api=1' width='615' height='355' style='width:615px;height:355px;'></iframe>

What am I doing wrong?

Answer 1

The problem is that once the javascript manipulates the dom, the & is encoded as HTML back to just an & . The actual javascript to replace & with & works fine.

See this fork of the commenter's JSFiddle. when the Alert happens, the string has & , but once it's written to the document, it displays just &