diff --git a/src/type.d.ts b/src/type.d.ts
new file mode 100644
index 0000000..a7b34af
--- /dev/null
+++ b/src/type.d.ts
@@ -0,0 +1,7 @@
+export type Optional<T> = {
+  [P in keyof T]?: T[P] | null;
+};
+
+export type Nullable<T> = {
+  [P in keyof T]: T[P] | null;
+};
diff --git a/src/utils/request.ts b/src/utils/request.ts
index 9b28edb..42c2b04 100644
--- a/src/utils/request.ts
+++ b/src/utils/request.ts
@@ -48,15 +48,20 @@ export class Request {
     return this.instance;
   }
 
-  get<T>(url: string, option?: AxiosRequestConfig): Promise<Response<T>> {
-    const reqConfig = option ?? {};
+  get<T>(url: string, option?: AxiosRequestConfig & { retRaw?: boolean }): Promise<Response<T>> {
+    const { retRaw, ...reqConfig } = option ?? {};
     return new Promise((resolve) => {
       this.instance
-        .get<Result<T>>(url, {
+        .get(url, {
           ...reqConfig,
         })
         .then((res) => {
-          resolve([null, res.data.data, res.data]);
+          if (retRaw) {
+            resolve([null, res.data as T, null]);
+          } else {
+            const resData = res.data as Result<T>;
+            resolve([null, resData.data, resData]);
+          }
         })
         .catch((err) => {
           resolve([err as AxiosError, null, null]);
diff --git a/src/utils/sleep.ts b/src/utils/sleep.ts
new file mode 100644
index 0000000..a4bf061
--- /dev/null
+++ b/src/utils/sleep.ts
@@ -0,0 +1,28 @@
+// 宏任务，下一个事件循环周期执行
+export const sleep = (ms: number = 0) => {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+};
+
+// 微任务版本 - 最快让出控制权
+// 微任务，当前事件循环周期的末尾执行
+export const sleepMicrotask = () => {
+  return new Promise((resolve) => queueMicrotask(() => resolve));
+};
+
+// 空闲时执行版本 - 性能友好
+export const sleepIdle = () => {
+  return new Promise((resolve) => {
+    if ('requestIdleCallback' in window) {
+      requestIdleCallback(resolve);
+    } else {
+      // fallback to setTimeout
+      setTimeout(resolve, 0);
+    }
+  });
+};
+
+// 帧同步版本 - 适合动画
+// 在下一次重绘前执行
+export const sleepFrame = () => {
+  return new Promise((resolve) => requestAnimationFrame(resolve));
+};