first commit

历届学生/18课程/class18/项目/上课项目/v3/src/mixins/scroll.js

@@ -0,0 +1,27 @@
+export default {
+    data() {
+        return {
+            currentEl: null        
+        }
+    },
+    methods: {
+       
+        handleScroll(index) {
+            // localStorage.setItem("index", index)
+            this.currentEl = document.querySelectorAll(".van-tab__pane")[index];
+            if (this.currentEl != undefined) {
+                this.currentEl.addEventListener("scroll", () => {
+                    // console.log("滚动距离：", this.currentEl.scrollTop);
+                    localStorage.setItem(`${index}Y`, this.currentEl.scrollTop)
+                });
+            }
+        },
+
+        scrollTop(currentIndex) {
+            var Y = localStorage.getItem(`${currentIndex}Y`);
+            if (this.currentEl != undefined) {
+                this.currentEl.scrollTo(0, Y);
+            }
+        }
+    },
+}