JS cross-domain Request for data

How often do we want to access the data under other sites?

Because JavaScript language security restrictions are caused by the same-origin policy.

When you use Ajax to request access to data from other servers, there is a cross-domain problem with the client.

In JS, it is not possible for us to request data from different domains directly with XMLHttpRequest.

So what do we do? (illustrated by the example of two different sites in the local area)

1: We create a new index page in WebClient such as:

2: Create a new general handler in re-webserver such as:

Open webserver site and WebClient site at the same time after completion

At this point we click on "cross-domain":

JS cross-domain Request for data