first commit

历届学生/zheng-yuqing/项目练习/学生项目/XY媒体查询练习/rem.html

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+<!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>rem</title>
+    <script>
+        window.onload = function () {
+            getRem(750, 100)
+        };
+        window.onresize = function () {
+            getRem(750, 100)
+        };
+        function getRem(pwidth, prem) {
+            var html = document.getElementsByTagName("html")[0];
+            var oWidth = document.body.clientWidth || document.documentElement.clientWidth;
+            html.style.fontSize = oWidth / pwidth * prem + "px";
+        }
+    </script>
+    <style>
+        body {
+            margin: 0;
+        }
+
+        /* html {
+            font-size: 100px;
+        } */
+
+        /* @media screen and (width:414px) {
+            body {
+                background: yellow;
+            }
+        } */
+
+        .box {
+            width: 3.75rem;
+            height: 3.75rem;
+            float: left;
+        }
+
+        .box_1 {
+            background: red;
+        }
+
+        .box_2 {
+            background: yellow;
+        }
+
+        /* 真实尺寸 = 你写rem * html上的 font-size */
+
+
+        /* 动态修改html上的font-size
+        1.媒体查询 @media */
+
+        屏幕的宽度 / 传过来图片的宽度 * 100
+    </style>
+</head>
+
+<body>
+    <div class="box box_1"></div>
+    <div class="box box_2"></div>
+</body>
+
+</html>

历届学生/zheng-yuqing/项目练习/学生项目/XY媒体查询练习/媒体查询.html

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+<!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>媒体查询</title>
+    <style>
+        body {
+            width: 100%;
+            height: 100vh;
+            background: red;
+            margin: 0;
+        }
+
+        @media screen and (min-width:100px) and (max-width:400px) {
+            body {
+                background: yellow;
+            }
+        }
+    </style>
+</head>
+<body>
+    
+</body>
+</html>

历届学生/zheng-yuqing/项目练习/学生项目/XY媒体查询练习/课上练习.html

@@ -0,0 +1,93 @@
+<!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>Document</title>
+    <style>
+        input {
+            width: 250px;
+            transition: all 2s cubic-bezier(0.7, -0.25, 0.84, 1.58);
+        }
+
+        input:hover {
+            width: 400px;
+        }
+
+        @keyframes an {
+            from {
+                width: 200px;
+                height: 200px;
+                background: red;
+            }
+
+            to {
+                width: 300px;
+                height: 300px;
+                background: blue;
+            }
+        }
+
+        /* .box {
+            width: 200px;
+            height: 200px;
+            animation: an 3s ease ;
+        } */
+
+        .box1 {
+            width: 100px;
+            height: 75px;
+            background: red;
+            border: 1px solid black;
+            transform: translateY(200px);
+            /* {x,y轴平移} */
+        }
+
+        .box2 {
+            width: 100px;
+            height: 75px;
+            background: red;
+            border: 1px solid black;
+            transform: rotateX(10deg);
+            /* {正数顺时针旋转，单位deg} */
+        }
+
+        .box3 {
+            width: 100px;
+            height: 75px;
+            background: red;
+            border: 1px solid black;
+            transform: scale(3, 1);
+            /* {让元素放大缩小x,y} */
+        }
+
+        .box4 {
+            width: 100px;
+            height: 100px;
+            background: red;
+            border: 1px solid black;
+            transform: skew(100deg,0);
+        }
+            /* {斜切x,y} */
+
+            /* matrix()6个参数，包括旋转，缩放，移动（平移）和斜切 */
+            /* rotate: ();沿中心轴旋转  rotateX: ();沿X轴旋转  rotateY:():沿Y轴旋转 */
+    </style>
+</head>
+
+<body>
+
+
+
+    <input type="text" placeholder="输入密码">
+
+    <div class="box"></div>
+    <div class="box1"></div>
+    <div class="box2"></div>
+    <div class="box3"></div>
+    <div class="box4"></div>
+</body>
+
+</html>