feat: leave ui

packages/app/src/utils/index.ts

@@ -1,3 +1,5 @@
 export { isDev } from './env';
 
 export * from './useragent';
+
+export * from './tools';

packages/app/src/utils/tools.ts

@@ -0,0 +1,8 @@
+export function debounce(fn: Function, timeout: number) {
+  let timeoutId: any;
+
+  return function (this: any) {
+    clearTimeout(timeoutId);
+    timeoutId = setTimeout(() => fn.apply(this, arguments), timeout);
+  };
+}