[重构] button buttonGroup buttonContainer 组件, 未破坏功能的前提下改进代码

src/hooks/useClickOutside.ts

@@ -1,16 +1,11 @@
 import { ref, onMounted, onUnmounted, Ref } from 'vue'
 
 const x = undefined
-// 案例详见 dropdown.vue
 const useClickOutside = (elementRef: Ref<HTMLElement | null>) => {
-  // 设置一个导出值
   const isClickOutside = ref(false)
-  // 给界面绑定上事件
   const handler = (e: MouseEvent) => {
     if (elementRef.value) {
-      // e.target 有可能是为 null 所以需要断言
       if (elementRef.value.contains(e.target as HTMLElement)) {
-        // 判断目标节点是不是当前的节点
         isClickOutside.value = false
       } else {
         isClickOutside.value = true