Chat System Setup

Assets/Scripts/ChatBehaviour.cs

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+using Mirror;
+using System;
+using UnityEngine;
+using TMPro;
+public class ChatBehaviour : NetworkBehaviour
+{
+    [SerializeField] private TextMeshProUGUI chatText = null;
+    [SerializeField] private TMP_InputField inputField = null;
+    [SerializeField] private GameObject canvas = null;
+
+    public override void OnStartClient()
+    {
+        canvas.SetActive(true);
+
+        SpawnScript.OnMessage += HandleNewMessage;
+    }
+
+    private void OnDestroy()
+    {
+        SpawnScript.OnMessage -= HandleNewMessage;
+    }
+
+    private void HandleNewMessage(string message)
+    {
+        chatText.text += message;
+    }
+
+    [Client]
+    public void Send()
+    {
+        if (!authority)
+        {
+            Debug.LogWarning("Attempted to send chat without authority.");
+        }
+
+        if (string.IsNullOrWhiteSpace(inputField.text)) { return; }
+        NetworkClient.localPlayer
+            .GetComponent<SpawnScript>()
+            .CmdSendMessage(inputField.text);
+        inputField.text = string.Empty;
+    }
+}