Cross-Domain Ajax with Dojo
If you are fairly new to JavaScript development or Ajax programming, you may not know that JavaScript has a limitation in which it cannot make a remote call to a service that is not on the same domain the script was called from. For instance, if I hosted a simple web service at kylehayes.info, I would not be able to access it from this site through the normal methods such as dojo.xhrGet() or dojo.xhrPost(). However, there are a couple of solutions to this issue. One of those is to consume web services that use a format called JSON-P (JSON with padding).
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Simple Ajax Form Tutorial
Submitting an Ajax form using Dojo is very straightforward and simple. The main goal here is to simply send the values of a form to a backend script (whatever your preference, e.g. PHP or Python), without ever leaving the page. The page should also show a response to the user confirming that their request was sent successfully.
For starters, we need a simple HTML form that we are going to send. Construct this as you normally would with an id, action, and method values. In my example, I’ve created a basic contact form:
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