init

2023-05-01 19:37:40 +08:00
commit da2c0fadf7
133 changed files with 29002 additions and 0 deletions
--- a/Html-Css/03-伪类.html
+++ b/Html-Css/03-伪类.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<html lang="en">
+
+
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width-device-width,initial-scale=1.0">
+    <title>伪类 </title>
+
+    <style>
+
+        #app {
+            height: 100px;
+            width: 100px;
+            background-color: salmon;
+            transition: all 0.3s; /*只针对数值的变化*/
+            /* 动画过渡 */
+        }
+
+
+        /* 鼠标悬停 */
+        #app:hover {
+            width: 200px;
+            height: 200px;
+            background-color: seagreen;
+        } 
+
+        /* 在盒子最后面生成一个盒子 */
+        #app::after {
+            content: "后浪";
+        }
+        /* 在盒子最前面生成一个盒子 */
+        #app::before {
+            content: "前浪";
+        }
+        
+    </style>
+
+   
+</head>
+
+<body>
+
+    <div id="app">
+        --我是app正常内容--
+
+    </div>
+    
+</body>
+
+</html>