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2021-03-23 10:58:10 +08:00
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10
csspress/1.css基础.md
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@@ -186,5 +186,13 @@ overflow-x:auto（滚动条）/ hidden (隐藏) 横向内容溢出的表现
overflow-y:auto（滚动条）/ hidden (隐藏) 纵向内容溢出的表现
verticle-align 设置元素的垂直对齐方式
属性值：
* baseline 默认值，元素放置在父元素的基线上
* text-top 元素顶端和父元素字体顶端对齐
* text-bottom 元素顶端和父元素字体底部对齐
* middle 元素位于父元素的中部
...

2
csspress/2.盒模型.md
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@@ -115,7 +115,7 @@ css 盒模型包括如下要素
width:300px;
height:300px;
background-color:red;
margin-top:20px;
margin-bottom:20px;
}
#inner {

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36
csspress/4.flex.md
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@@ -7,16 +7,9 @@ flex 意为弹性盒子，用来为盒模型提供最大的灵活性
任何一个元素都能被指定为flex 容器
```
/*
选中元素为块级元素时
*/
display:flex
display:flex 选中元素为块级元素时
/*
选中元素为内联元素时
*/
display:inline-flex
display:inline-flex 选中元素为内联元素时
```
### 基本概念
@@ -35,13 +28,24 @@ display:inline-flex
当 flex-direction 的值为column时 主轴为竖直 侧轴为水平
![image-20210120143705542](E:\web\lessons\课件\csspress\4.flex.assets\image-20210120143705542.png)
![image-20210222165013291](\4.flex.assets\image-20210222165013291.png)
![image-20210120143705542](\4.flex.assets\image-20210120143705542.png)
### 容器的属性
- flex-direction 声明容器使用的轴是水平的还是垂直的
- row 水平
- column 垂直
- row 水平（起点在左）
- column 垂直 （起点在上）
- row-reverse 水平（起点在右）
- column-reverse 垂直（起点在下）
- justify-content 声明排列的方式
- center 居中
- space-around 每个项目两侧的间隔相等 项目到边框有间距
@@ -53,7 +57,7 @@ display:inline-flex
- baseline 第一行文字的基线对齐
- stretch 默认占满整个容器的高度
![image-20210120113341512](E:\web\lessons\课件\csspress\4.flex.assets\image-20210120113341512.png)
![image-20210120113341512](\4.flex.assets\image-20210120113341512.png)
```
<!DOCTYPE html>
@@ -103,7 +107,7 @@ display:inline-flex
##### center: 水平居中
![image-20210120114326831](E:\web\lessons\课件\csspress\4.flex.assets\image-20210120114326831.png)
![image-20210120114326831](\4.flex.assets\image-20210120114326831.png)
```
.box{
@@ -120,7 +124,7 @@ display:inline-flex
##### space-around 每个项目两侧的间隔相等 项目到边框有间距
![image-20210120114504619](E:\web\lessons\课件\csspress\4.flex.assets\image-20210120114504619.png)
![image-20210120114504619](\csspress\4.flex.assets\image-20210120114504619.png)
```
.box{
@@ -137,7 +141,7 @@ display:inline-flex
##### space-between 两端对齐 项目之间的间隔都相等
![image-20210120114721023](E:\web\lessons\课件\csspress\4.flex.assets\image-20210120114721023.png)
![image-20210120114721023](\4.flex.assets\image-20210120114721023.png)

49
csspress/5.自适应和响应式.md
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@@ -75,6 +75,50 @@
通过’%‘单位来实现响应式效果。浏览器高度和宽度发生变化时，通过百分比单位可以使元素的高和宽随着浏览器的变化而变化，从而实现响应式效果
可以取百分比的属性：
* 定位：top, right, bottom, left
* 盒模型：width,height, margin,padding
* 背景：backgroug-position, backgroud-size
* 文本：text-indent
* 字体：font-size
css 百分比都相对于谁？
结论：css的布局块都是盒子，然后一个盒子的百分比其实是相对于其包含块的，也就是他的父级元素。
* 相对于父级宽度的：
* width
* max-width
* min-width
* padding
* margin
* text-indent
* left
* right
...
* 相对于父级高度的：
* height
* max-height
* min-height
* top
* bottom
* 相对于主轴长度(在flex弹性盒子布局中)
* flex-basis
* 相对于继承字号的
* font-size
* 相对于自身字号的
* line-height
* 相对于自身宽高的
* border-radius 等border相关
* background-size
...
* 相对于行高的
* verticle-align (设置元素垂直对齐方式)
示例：
```
@@ -195,5 +239,8 @@ rem是一个相对单位，1rem等于html元素上字体设置的大小。我们
2.根据设计稿大小，调整里面的最后两个参数值。
3.使用1rem=100px转换你的设计稿的像素，例如设计稿上某个块是100px*300px,换算成rem则为1rem*3rem。
3.使用1rem=100px转换你的设计稿的像素，例如设计稿上某个块是100px * 300px,换算成rem则为1rem*3rem。
示例参考demo/rem.html

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csspress/css实战(一).md Normal file
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@@ -0,0 +1,43 @@
# css实战阶段一
### 苏宁易购
#### 顶部导航栏：
![image-20210223180523455](E:\web\lessons\课件\csspress\css实战(一).assets\image-20210223180523455.png)
说明： 写完顶部导航条以后需要加上下面的白色下拉框的内容 本阶段可以一直显示
### 白色的标题搜索栏
![image-20210223181949796](E:\web\lessons\课件\csspress\css实战(一).assets\image-20210223181949796.png)
### 分类
![image-20210223182049992](E:\web\lessons\课件\csspress\css实战(一).assets\image-20210223182049992.png)
### 热卖爆款
![image-20210223182258454](E:\web\lessons\课件\csspress\css实战(一).assets\image-20210223182258454.png)
### 冰箱洗衣机
![image-20210223182345438](E:\web\lessons\课件\csspress\css实战(一).assets\image-20210223182345438.png)
### 底部导航
![image-20210223182428924](E:\web\lessons\课件\csspress\css实战(一).assets\image-20210223182428924.png)
### 固定的侧边栏
![image-20210223182524394](E:\web\lessons\课件\csspress\css实战(一).assets\image-20210223182524394.png)

52
csspress/demo/absolute.html Normal file
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@@ -0,0 +1,52 @@
<!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>
* {
margin: 0;
padding: 0;
}
div {
width: 60px;
height: 60px;
}
.box1 {
width: 200px;
height: 200px;
background: yellow;
margin: 20px;
/* position:static */
position: absolute;
}
.box2 {
background: red;
position: absolute;
top: 0px;
left: 0px;
}
</style>
</head>
<body>
<div class="box1">
<div class="box2"></div>
</div>
<p>
<p> 注：这里红色的div是依据 body定位的，而不是根据父元素黄色的div 定位，</p>
<p> 加上position static 后也是根据body 定位，</p>
<p>当父元素的Position声明为 absolute 时，红色会依据父级黄色定位，但是会超脱文档流，影响下面的元素</p>
</p>
</body>
</html>

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csspress/demo/fixed.html Normal file
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@@ -0,0 +1,46 @@
<!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>
* {
margin: 0;
padding: 0;
}
body{
overflow: auto;
}
.box1 {
background: yellow;
position: sticky;
top: 0;
width: 100%;
/* height: 50px; */
}
.box2 {
height: 20px;
position: fixed;
top: 30px;
width: 100%;
background: red;
}
.box3{
width: 60px;
height: 900px;
background: pink;
}
</style>
</head>
<body>
<div class="box1">暖暖</div>
<div class="box2"></div>
<div class="box3"></div>
</body>
</html>

90
csspress/demo/flex.html
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@@ -1,57 +1,107 @@
<!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>
*{
margin:0;
padding:0;
* {
margin: 0;
padding: 0;
}
.box{
.box {
width: 1000px;
height: 500px;
background: pink;
display:flex;
display: flex;
/* 通过display:flex来把目标元素设置成flex布局 */
flex-direction: row;
/* align-items: center; */
justify-content: space-between;
/* flex-direction 属性决定主轴的方向，值为row的时候水平排列 起点在左 */
}
.box1{
.box1 {
width: 1000px;
height: 500px;
background: gold;
display:flex;
flex-direction: row;
align-items: center;
/*
justify-content: space-between;
justify-content: space-around;
justify-content: space-center;
*/
display: flex;
flex-direction: row-reverse;
}
.left,.left1{
.left,
.left1 {
width: 200px;
height: 200px;
background: red;
}
.right,.right1{
.right,
.right1 {
width: 200px;
height: 200px;
background: blue;
}
.box3 {
flex-direction: column;
}
.box4 {
flex-direction: column-reverse;
}
</style>
</head>
<body>
<div class="box">
<div class="box" style="margin-bottom: 15px;">
<div class="left"></div>
<div class="right"></div>
<div>
这里是flex-direction:row的状况 即水平排列 起点在左侧
</div>
</div>
<div class="box">
<div class="left"></div>
<div class="left"></div>
<div class="left"></div>
<div class="left"></div>
<div class="left"></div>
<div class="left"></div>
<div class="right"></div>
<div>
这里是flex-direction:row的状况 即水平排列 起点在左侧
对于溢出的状况，flex-wrap 可以定义是否换行
<P>默认属性值为 nowrap 不换行；其他属性还有wrap(换行), wrap-reverse(换行，第二行反向排列)</P>
</div>
</div>
<div class="box1">
<div class="left1"></div>
<div class="right1"></div>
<div class="left1"></div>
<div>
这里是flex-direction:column的状况 即垂直排列 起点在上面
</div>
</div>
<div class="box box3">
<div class="left"></div>
<div class="right"></div>
<div>
这里是flex-direction:column的状况 即垂直排列 起点在下面
</div>
</div>
<div class="box1 box4">
<div class="right1"></div>
<div class="left1"></div>
<div>
这里是flex-direction:column-reverse的状况 即垂直排列 起点在下面
</div>
</div>
</body>
</html>

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csspress/demo/flex1pailie.html Normal file
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@@ -0,0 +1,86 @@
<!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>
*{
margin:0;
padding:0;
}
.box{
width: 1000px;
height: 500px;
background: pink;
display:flex;
/* 通过display:flex来把目标元素设置成flex布局 */
flex-direction: row;
/* flex-direction 属性决定主轴的方向，值为row的时候水平排列 起点在左 */
justify-content: center;
}
.box1{
width: 1000px;
height: 500px;
background: gold;
display:flex;
flex-direction: row;
justify-content: space-between;
}
.left,.left1{
width: 200px;
height: 200px;
background: red;
}
.right,.right1{
width: 200px;
height: 200px;
background: blue;
}
.box3{
justify-content: space-around;
}
.box4{
flex-direction: column-reverse;
}
</style>
</head>
<body>
<div style="margin-bottom: 50px;">
注：以下所有实例 基于flex-direction:row的情况，即水平排列 起点在左边
</div>
<div class="box">
<div class="left"></div>
<div class="right"></div>
</div>
<div style=" margin-bottom: 30px;">
上面是 justify-content:center 居中的状况
</div>
<div class="box1">
<div class="left"></div>
<div class="right"></div>
</div>
<div style=" margin-bottom: 30px;">
上面是 justify-content:space-between 居中的状况
两端对齐 项目之间的间隔都相等
</div>
<div class="box box3">
<div class="left"></div>
<div class="right"></div>
</div>
<div style=" margin-bottom: 30px;">
上面是 justify-content:space-around 居中的状况
每个项目两侧的间隔相等 项目到边框有间距
即两端不对齐
</div>
</body>
</html>

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csspress/demo/flexjiaochazhou.html Normal file
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@@ -0,0 +1,112 @@
<!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>
*{
margin:0;
padding:0;
}
.box{
width: 1000px;
height: 500px;
background: pink;
display:flex;
/* 通过display:flex来把目标元素设置成flex布局 */
flex-direction: row;
/* flex-direction 属性决定主轴的方向，值为row的时候水平排列 起点在左 */
align-items: center;
}
.box1{
width: 1000px;
height: 500px;
background: gold;
display:flex;
flex-direction: row;
align-items: flex-start;
}
.left,.left1{
width: 200px;
height: 200px;
background: red;
}
.right,.right1{
width: 200px;
height: 200px;
background: blue;
}
.box3{
align-items: flex-end;
}
.box4{
align-items: baseline ;
}
.box5{
align-items: stretch;
}
.lefta{
height:auto
}
.boxfin{
flex-direction: column;
align-items: center;
}
</style>
</head>
<body>
<div style="margin-bottom: 50px;">
注：以下所有实例 基于flex-direction:row的情况，即水平排列 起点在左边
且 主轴为默认
</div>
<div class="box">
<div class="left"></div>
<div class="right"></div>
</div>
<div style=" margin-bottom: 30px;">
上面是 align-items:center 居中的状况
</div>
<div class="box1">
<div class="left"></div>
<div class="right"></div>
</div>
<div style=" margin-bottom: 30px;">
上面是 align-items: flex-start; 起点在上面
</div>
<div class="box box4">
<div class="left"></div>
<div class="right"></div>
</div>
<div style=" margin-bottom: 30px;">
上面是 align-items:base-line 项目的第一行文字的基线对齐的情况
</div>
<div class="box1 box5">
<div class="left lefta"></div>
<div class="right lefta"></div>
</div>
<div style=" margin-bottom: 30px;">
上面是 align-items:stretch（默认值） 如果项目未设置高度或设为auto，将占满整个容器的高度。
</div>
<div class="box1 boxfin">
<div class="left"></div>
<div class="right"></div>
</div>
<div class="zong">
总结1：flex-direction属性定义的是主轴方向，默认为水平，所以 交叉轴方向默认为垂直;
<p>当 flex-direction的值为column的时候，align-items决定的就是垂直方向的排列方式</p>
<b>align-items决定的是交叉轴的排列方式 而不一定是单指 垂直的排列方式</b>
</div>
</body>
</html>

11
csspress/demo/position.html
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@@ -1,11 +0,0 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
</html>

35
csspress/demo/relative.html Normal file
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@@ -0,0 +1,35 @@
<!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>
* {
margin: 0;
padding: 0;
}
div{
width: 60px;
height: 60px;
}
.box1 {
background: yellow;
}
.box2 {
background: red;
position: relative;
top: 20px;
left: 30px;
}
</style>
</head>
<body>
<div class="box1">暖暖</div>
<div class="box2"></div>
</body>
</html>

2
csspress/demo/zishiying1.html
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@@ -38,6 +38,6 @@
</style>
</head>
<body>
媒体查询实现自适应
</body>
</html>

45
csspress/demo/zishiying2.html
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@@ -1,50 +1,35 @@
<!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>
<script>
document.querySelectorAll
</script>
<style>
*{
margin:0px;
margin:0;
padding: 0;
}
html , body{
width:100% ;
html,
body {
width: 100%;
height: 100%;
}
.box{
width: 100%;
height: 60%;
border: 1px solid black;
}
.content{
width: 60px;
height: 60px;
width: 30%;
height: 30%;
background: pink;
margin: 30px;
}
/* @media (max-width: 780px) {
.box{
width: 600px;
}
.content{
background: skyblue;
}
}
@media (max-width: 600px) {
.box{
width: 500px;
}
.content{
background: rgb(135, 235, 202);
}
} */
</style>
</head>
<body>
<div class="box">
<!-- <div class="content"></div> -->
</div>
百分比实现自适应
<div class="box"></div>
</body>
</html>

117
csspress/实战/xuechengzaixian.html Normal file
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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>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.nav{
width: 100%;
height: 66px;
vertical-align:middle;
line-height: 66px;
background: #f4f5f7;
font-size: 13px;
}
.main{
width: 938px;
margin: 0 auto;
display: flex;
justify-content: space-between;
}
.left{
display: flex;
}
.logo{
width: 132px;
height: 29px;
background-color: aqua;
margin: auto 0;
margin-right: 20px;
}
.menu{
list-style: none;
display: inline-flex;
}
.menu li{
margin-right: 27px;
}
.search{
width: 180px;
height: 28px;
border-radius: 4px;
outline: none;
border: 0px;
padding-left: 20px;
margin-left: 1px;
}
.right{
display: flex;
}
.msg{
width: 10px;
height: 20px;
background: black;
margin: auto 0;
margin-left: 11px;
margin-right: 11px;
}
.photo{
width: 20px;
height: 20px;
border-radius: 60%;
background: white;
margin: auto 0;
margin-right: 11px;
}
.searchbox{
background: #00a4ff;
height: 32px;
margin: auto 0;
line-height:29px;
margin-right:19px
}
.searchbox span{
color: white;
padding:5px 19px;
}
.icon{
width: 10px;
height: 10px;
}
</style>
</head>
<body>
<div class="nav">
<div class="main">
<div class="left">
<img src="" alt="" class="logo">
<ul class="menu">
<li>首页</li>
<li>课程</li>
<li>职业规划</li>
</ul>
</div>
<div class="right">
<div class="searchbox">
<input type="text" placeholder="输入关键字" class="search">
<span>搜索</span>
</div>
<p>个人中心</p>
<div class="msg"></div>
<div class="photo"></div>
<p>asd</p>
</div>
</div>
</div>
</body>
</html>