feature:

添加大量可配置项

components/Progress.js

@@ -14,6 +14,7 @@ const Progress = ({ targetRef, showPercent = true }) => {
       const fullHeight = clientHeight - window.outerHeight
       let per = parseFloat(((scrollY / fullHeight * 100)).toFixed(0))
       if (per > 100) per = 100
+      if (per < 0) per = 0
       changePercent(per)
     }
   }