Client

callbackRegister

fjsf.callbackRegister(name, handler)

Registers a client-side callback that can be invoked from the server.

This allows the server to execute client logic and receive a returned value.

---

Parameters

• name string Unique identifier of the callback.

• handler function Function executed when the callback is triggered by the server. Arguments are forwarded from the server. The returned value is sent back to the server.

---

Returns

This function does not return anything.

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Example

fjsf.callbackRegister('ping', function()
    return 'pong'
end)

---

callbackCall

fjsf.callbackCall(name, timeout, response, ...)

Calls a server-side callback asynchronously.

The provided response function is invoked when the server returns a result or when the timeout is reached.

---

Parameters

• name string Registered server callback name.

• timeout number | nil Maximum wait time in milliseconds. Defaults to 5000 if nil.

• response function Function invoked with the returned value. Receives nil if the request times out.

• ... any Arguments passed to the server callback.

---

Returns

This function does not return anything.

---

Example

fjsf.callbackCall(
    'ping',
    3000,
    function(result)
        print(result) -- "pong"
    end
)

---

callbackAwait

fjsf.callbackAwait(name, timeout, ...)

Calls a server-side callback and waits synchronously for the result.

This function blocks execution until a response is received or the timeout expires.

---

Parameters

• name string Registered server callback name.

• timeout number | nil Maximum wait time in milliseconds. Defaults to 5000 if nil.

• ... any Arguments passed to the server callback.

---

Returns

• any Returned value from the server callback, or nil if the request times out.

---

Example

local result = fjsf.callbackAwait('ping', 3000)
print(result) -- "pong"