代码提交

2021-03-14 01:30:38 +08:00
parent a29ff4b0b8
commit 055f77d499
11 changed files with 206 additions and 43 deletions
@@ -60,6 +60,23 @@
            });
        }
    });
+
+    // 当网页向下滑动 20px 出现"返回顶部" 按钮
+    window.onscroll = function() {scrollFunction()};
+
+    function scrollFunction() {console.log(121);
+        if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
+            document.getElementById("myBtn").style.display = "block";
+        } else {
+            document.getElementById("myBtn").style.display = "none";
+        }
+    }
+
+    // 点击按钮，返回顶部
+    function topFunction() {
+        document.body.scrollTop = 0;
+        document.documentElement.scrollTop = 0;
+    }
 </script>