如果Javascript是外部的，为什么Javascript无法在XML上运行

Question

I did some manipulation with an XML database through Javascript. XML was within the HTML code and it worked fine, but when I wanted to use XLST, I had to make XML external. Upon doing so, Javascript lost all it's function, even though the ID of the XML file which I used to call it in a function remained the same.

Is there a way around this?

Answer 1

You need some intermediate device to go between the JavaScript and XML file (server-side code of some fashion most-likely). JavaScript cannot directly manage flat files (which is what the "XML database" you reference is).

Work-flow would be in the following [pseudo-]pattern:

1. Use server to read (and render) XML to the browser.
2. Use JavaScript to manipulate the XML (via some UI like dialogs, lists, or just plain functionality).
3. Use JavaScript to pass the new XML format back to the server for storing.

if you already have a go-between, make sure you're on the same domain name when making calls to and from the server. As a commenter pointed out, JavaScript cannot go between domain levels natively; Instead you'd have to use either something like JSONP or setup the Access-Control-* headers on the remote server,