更新代码的执行顺序 保证app被启动后才开启热模块替换.

src/index.tsx

@@ -22,16 +22,19 @@ document.onselectstart = () => false
 window.onload = function ()
 {
     new WebCAD("app");
-};
 
-async function loadFirst()
-{
-    let cmd = (await import("./Add-on/test")).Test;
-    commandMachine.RegisterCommand("tt", new cmd());
-}
-loadFirst();//必须先加载一次,否则无法触发热模块替换
 
-if (module.hot)
-{
-    module.hot.accept('./Add-on/test', loadFirst)
-}
+    //-----热模块替换的代码.
+    async function loadFirst()
+    {
+        let cmd = (await import("./Add-on/test")).Test;
+        commandMachine.RegisterCommand("tt", new cmd());
+    }
+    loadFirst();//必须先加载一次,否则无法触发热模块替换
+
+    if (module.hot)
+    {
+        module.hot.accept('./Add-on/test', loadFirst)
+    }
+};
+