bug fix and performance improvements

miniprogram/miniprogram_npm/tdesign-miniprogram/empty/empty.d.ts

@@ -0,0 +1,15 @@
+import { SuperComponent } from '../common/src/index';
+export default class extends SuperComponent {
+    options: {
+        multipleSlots: boolean;
+    };
+    externalClasses: string[];
+    properties: import("./type").TdEmptyProps;
+    data: {
+        prefix: string;
+        classPrefix: string;
+    };
+    observers: {
+        icon(icon: any): void;
+    };
+}