refine dashboard css

src/utils/index.js

@@ -212,3 +212,38 @@
    }
  }
 
+ export function debounce(func, wait, immediate) {
+   let timeout, args, context, timestamp, result;
+
+   const later = function() {
+    // 据上一次触发时间间隔
+     const last = +new Date() - timestamp;
+
+    // 上次被包装函数被调用时间间隔last小于设定时间间隔wait
+     if (last < wait && last > 0) {
+       timeout = setTimeout(later, wait - last);
+     } else {
+       timeout = null;
+      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
+       if (!immediate) {
+         result = func.apply(context, args);
+         if (!timeout) context = args = null;
+       }
+     }
+   };
+
+   return function(...args) {
+     context = this;
+     timestamp = +new Date();
+     const callNow = immediate && !timeout;
+    // 如果延时不存在，重新设定延时
+     if (!timeout) timeout = setTimeout(later, wait);
+     if (callNow) {
+       result = func.apply(context, args);
+       context = args = null;
+     }
+
+     return result;
+   };
+ }
+