Low-level implementation of rust commands

[hanxiaohuivc]

Hello everyone. I want to know the implementation principle and method of "Create Rust Commands". In which module's source code can I see the specific implementation?

[hanxiaohuivc]

Let me describe my problem in detail.

My example of calling the "invoke" function using js code is as follows,
‘invoke(”jstorustwebapi“, {invokeMessage:”https://jsonplaceholder.typicode.com/posts/2“ })
.then((message) => {
console.log(message);
})’

When I debug and call the following code, "callback" is a very long string of numbers.
‘if (window.rpc) {
window.rpc.notify(
cmd,
_objectSpread({
callback: callback,
error: error,
__invokeKey: key || TAURI_INVOKE_KEY
},
args
)
)
}’

Excuse me, how is the value of callback generated, and how is the value related to the rust function? thanks.