feat: debounce & thtottle (#244)

src/utils/debounce/index.ts

@@ -1,12 +1,39 @@
+import { unref } from "vue";
+import type { Ref } from "vue";
+
+type FunctionArgs<Args extends any[] = any[], Return = void> = (
+  ...args: Args
+) => Return;
+
+type MaybeRef<T> = T | Ref<T>;
+
 // 延迟函数
 export const delay = (timeout: number) =>
   new Promise(resolve => setTimeout(resolve, timeout));
 
-// 防抖函数
-export const debounce = (fn: () => Fn, timeout: number) => {
+/**
+ * 防抖函数
+ * @param fn 函数
+ * @param timeout 延迟时间
+ * @param immediate 是否立即执行
+ * @returns
+ */
+export const debounce = <T extends FunctionArgs>(
+  fn: T,
+  timeout: MaybeRef<number> = 200,
+  immediate = false
+) => {
   let timmer: TimeoutHandle;
+  const wait = unref(timeout);
   return () => {
-    timmer ? clearTimeout(timmer) : null;
-    timmer = setTimeout(fn, timeout);
+    timmer && clearTimeout(timmer);
+    if (immediate) {
+      if (!timmer) {
+        fn();
+      }
+      timmer = setTimeout(() => (timmer = null), wait);
+    } else {
+      timmer = setTimeout(fn, wait);
+    }
   };
 };