fengchuanyu há 5 dias atrás
pai
commit
8e497ce722
1 ficheiros alterados com 58 adições e 0 exclusões
  1. 58 0
      4_BOM&DOM/练习9_三道杠.html

+ 58 - 0
4_BOM&DOM/练习9_三道杠.html

@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+    <style>
+        .box {
+            width: 200px;
+            height: 50px;
+            background-color: red;
+            margin-top: 20px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="box"></div>
+    <div class="box"></div>
+    <div class="box"></div>
+    <script>
+        var aBox = document.getElementsByClassName("box");
+        var timer1 = null;
+        for (var i = 0; i < aBox.length; i++) {
+            aBox[i].index = i;
+            aBox[i].onmouseover = function () {
+                var _index = this.index;
+                clearInterval(aBox[_index].timer2)
+                aBox[_index].timer1 = setInterval(function () {
+                    var _width = aBox[_index].offsetWidth;
+                    if (_width >= 600) {
+                        clearInterval(aBox[_index].timer1)
+                    } else {
+                        _width += 10;
+                        aBox[_index].style.width = _width + "px";
+                    }
+                }, 16)
+            }
+
+            aBox[i].onmouseout = function () {
+                var _index = this.index;
+                clearInterval(aBox[_index].timer1)
+                aBox[_index].timer2 = setInterval(function () {
+                    var _width = aBox[_index].offsetWidth;
+                    if (_width <= 200) {
+                        clearInterval(aBox[_index].timer2)
+                    } else {
+                        _width -= 10;
+                        aBox[_index].style.width = _width + "px";
+                    }
+                }, 16)
+            }
+        }
+    </script>
+</body>
+
+</html>