bug fix

src/modules/grading/marker/MarkerHeader.vue

@@ -370,10 +370,10 @@ export default {
       this.markers = data || [];
     },
     keyEvent(e) {
-      e.preventDefault();
       if (!e.altKey && !e.shiftKey && !e.repeat) {
         // 左右键切换分页
         if (e.code === "ArrowLeft") {
+          e.preventDefault();
           if (e.ctrlKey) {
             this.toFirstPage();
           } else {
@@ -383,6 +383,7 @@ export default {
         }
 
         if (e.code === "ArrowRight") {
+          e.preventDefault();
           if (e.ctrlKey) {
             this.toLastPage();
           } else {