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W250913
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fengchuanyu 3 weeks ago
parent
edeea6db06
commit
cb54af8f38
2 changed files with 27 additions and 0 deletions
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  1. 2 0
      2_CSS/36_vh_vw.html
  2. 25 0
      2_CSS/37_显示隐藏.html

+ 2 - 0
2_CSS/36_vh_vw.html
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@@ -14,6 +14,8 @@
 
             background-color: red;
 
             /* vh viewport height 视口高度 */
 
             /* vi viewport width 视口宽度 */
 
+            /* 1vh 等于 视口高度的 1% */
 
+            /* 1vw 等于 视口宽度的 1% */
 
             height: 100vh;
 
             width: 100vw;
 
         }

+ 25 - 0
2_CSS/37_显示隐藏.html
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@@ -0,0 +1,25 @@
 
+<!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: 100px;
 
+            height: 100px;
 
+            background-color: red;
 
+            /* opacity: 0; */
 
+            display: none;
 
+        }
 
+        button:hover + .box{
 
+            display: block;
 
+        }
 
+    </style>
 
+</head>
 
+<body>
 
+    <button>显示/隐藏</button>
 
+    <div class="box"></div>
 
+    hello
 
+</body>
 
+</html>