This article will take you through several methods of using CSS to implement a nine-square grid layout. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.
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Directory:
Margin negative value realization
The inner and outer harmony of grandfather and biological father
Change the idea-li gave birth to a son to help Very busy.
Use absolute orientation value to achieve adaptive grid layout
cloumn multi-column layout
grid
display: table;
css3 selector nth-child()
Unless otherwise specified, the general html structure of the following methods is as follows:
<div class="box">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
</ul>
</div>Unless otherwise specified Note that the css reset code used in the layout is as follows:
/* 基础 */
.box{
background: #e4f7fd61;
border: 2px solid #0786ada1;
border-radius: 8px;
}
ul{
padding: 0;
}
.box li{
list-style: none;
text-align: center;
line-height: 200px;
background: rgba(146, 203, 230, 0.65);
border-radius: 8px;
}Principle
marginNegative margin
Key points
1. Outermost The wrapping element of the layer is equal to: li width*3 li right spacing*2
2. If li is the right spacing, then the margin-right of ul is a negative li spacing value.
3. The parent element ul uses overflow:hidden; to form bfc to clear the impact of floating (parent element collapses).
4. The combination of margin-bottom and margin-top is the same as right. It eliminates the bottom margin of the last row of li.
5. li should be floating. The margin direction is consistent with the margin direction when ul is set to a negative value.
Key code
.box{
width: 940px;
}
ul{
overflow: hidden;
margin-right: -20px;
margin-bottom: -20px;
margin-top: 0;
}
.box li{
float: left;
width: 300px;
height: 200px;
margin-right: 20px;
margin-bottom: 20px;
}Principle
Outer box boxIn fact, from another angle and idea, it is another solution. Without negative margin, we want li to have an effect on both ends of ul. The reason why we are confused is because li needs margin- right, and the margin of the last li on the right will widen the distance from the father ul, giving us a headache. Since it’s an extraneous branch, can’t we just ask Grandpa to cut off the extra branch? The father ul sets the width and insists that his son occupy his position, while the box grandfather is a bad guy and uses overflow to cut off the extra margin-right distance.overflow
Combined withulelement width dead value
Key points
1. Box uses overflow:hidden; ruthlessly cut off the right margin of li2. ul sings white For the face, set the width so that the three li stand side by side, and do not let the last li stand in the next row because there is no room. 3. li Be your most sincere self
Key code
Because the demo is all in one html to prevent class name overwriting , the box that was originally called box here is now called sec
.sec{
width: 640px;
overflow: hidden;
}
ul{
width: 660px;
overflow: hidden;
margin-bottom: -20px;
margin-top: 0;
}
.sec li{
float: left;
width: 200px;
height: 200px;
margin-right: 20px;
margin-bottom: 20px;
}
The red border in the picture is the li element, and the total dark red area of the red border is li Child elements within the element. The white distance between the red border and the child element is generated by the margin of the child element.
Key points
1. The parent element box used to have a padding of 20, but this time it was changed to 10, because the grandchild li>div will Helpful.
Key code2. li no longer sets margin-right to expand the distance between multiple li
3. The div inside the li sets left and right margins to expand li and li and li and parent The distance between elements.
The html structure will be changed here. In addition to the previous structure, an additional div structure will be added inside the li to expand the spacing. .
<div class="sec02">
<h3>
里应外合-li的边距交给孩子们来做，自己只负责一排站三个人的排列工作 </h3>
<div class="box">
<ul>
<li><div>1</div></li>
<li><div>2</div></li>
<li><div>3</div></li>
<li><div>4</div></li>
<li><div>5</div></li>
<li><div>6</div></li>
<li><div>7</div></li>
<li><div>8</div></li>
<li><div>9</div></li>
</ul>
</div>
</div> box{
padding: 20px 10px;
display: inline-block;
background: #ff000026;
}
ul{
overflow: hidden;
width: 600px;
margin-bottom: -10px;
margin-top: 0;
background: none;
}
li{
list-style: none;
float: left;
width: 198px;/*可以用百分比*/
height: 198px;/*可以用百分比*/
margin-bottom: 10px;
border: 1px solid red;
}
li > div{
background: rgba(255, 0, 0, 0.24);
margin: 0 10px;
border-radius: 8px;
text-align: center;
line-height: 198px;
}The effect after removing the red border
The right margin of the eldest son of li and the left margin of the eldest son of the next li combine to form the spacing between the two li.
自适应？先来一波效果图：
原理
absolute+四个方位值撑开局面、float+宽度百分比实现横向排列。高度百分比实现自适应。
关键点
1. page最外层的父元素使用absolute负责占位，给子元素们把空间拉开。或者用宽高也行
2. 每一个块的父元素list利用浮动和33.33%的宽度百分比实现横向自适应排列
3. 本案例中，list元素内部用了伪元素+absolute的方式做了效果展示，实际项目中，list元素里边就可以填充自己个各式各样的业务代码了。
关键代码
<div class="page"> <div class="list" data-index="1"> </div> <div class="list" data-index="2"> </div> <div class="list" data-index="3"> </div> <div class="list" data-index="4"> </div> <div class="list" data-index="5"> </div> <div class="list" data-index="6"> </div> <div class="list" data-index="7"> </div> <div class="list" data-index="8"> </div> <div class="list" data-index="9"> </div> </div>
html,body{
height:100%;
margin:0;
}
.page{
position:absolute;
left:0;
top:180px;
right:0;
bottom:0;
}
.list{
float:left;
height:33.3%;
width:33.3%;
position:relative;
}
.list:before{
content:'';
position:absolute;
left:10px;
right:10px;
top:10px;
bottom:10px;
border-radius:10px;
background-color:#cad5eb;
}
.list:after{
content:attr(data-index);
position:absolute;
height:30px;
left:0;
right:0;
top:0;
bottom:0;
margin:auto;
text-align:center;
font:24px/30px bold 'microsoft yahei';
}原理
cloumn设置三栏布局，这种还是自适应效果的
关键点
1. box依旧做了最严格的祖父，又是宽度限制，又是overflow决绝设卡。
2. ul这次挑了大梁，针对内部的li使用column多栏布局，设置为三栏显示，且每一栏之间
3. 而有了ul的操心，li则美滋滋的做起了公子哥，只管自己的宽高和下边距就好，右边距他爹都给他处理好了。
关键代码
.box{
width: 640px;
overflow: hidden;
}
ul {
/* display: flex; */
-webkit-column-count: 3;
-moz-column-count: 3;
-webkit-column-gap: 20px;
-moz-column-gap: 20px;
margin-bottom: -20px;
margin-top: 0;
}
li {
width: 200px;
height: 200px;
/*margin-right: 20px;*/
margin-bottom: 20px;
}原理
用CSS Grid 创建网格布局，是最简单也是最强大的方法。
关键点
1. 九个单元的父元素wrapper设置display为grid类型（注意兼容写法）
默认九个元素就会堆叠排序。
2. 设置每一行中单个元素的宽度： grid-template-columns，每个宽度值100px根据业务需要设置。
给三个设置了宽度就长这样了。
3. 设置每一列中单个元素的高度： grid-template-rows，每个高度值100px根据业务需要设置。
最后出现我们想要的效果：
关键代码
<div class="wrapper"> <div class="list list1"> 1 </div> <div class="list list2"> 2 </div> <div class="list list3"> 3 </div> <div class="list list4"> 4 </div> <div class="list list5"> 5 </div> <div class="list list6"> 6 </div> <div class="list list7"> 7 </div> <div class="list list8"> 8 </div> <div class="list list9"> 9 </div> </div>
.wrapper{
display: grid;
grid-template-columns: 100px 100px 100px;
grid-template-rows: 100px 100px 100px;
}
.list{
background: #eee;
}
.list:nth-child(odd){
background: #999;
}原理
其实他是table的css版本处理方式。原谅我只能想到加结构、模拟tr+td的方式实现了。
好处：也是唯一能用来安慰自己的地方就是，不用table标签少了很多reset样式~
关键点
1. 三行li，每个li里三列div（模拟表格的结构）
2. 父元素ul使用display: table（此元素会作为块级表格来显示（类似
），表格前后带有换行符。）
3. li元素使用display: table-row（此元素会作为一个表格行显示（类似
）。） 4. li元素内部三个子元素使用display: table-cell（此元素会作为一个表格单元格显示（类似
和 ）） 关键代码
<ul class="table"> <li> <div>1</div> <div>2</div> <div>3</div> </li> <li> <div>4</div> <div>5</div> <div>6</div> </li> <li> <div>7</div> <div>8</div> <div>9</div> </li> </ul>Copy after login.table { display: table; } .table li { display: table-row; background: #beffee; } .disTable li:nth-child(odd) { background: #bec3ff; } .table li div { width: 200px; line-height: 200px; display: table-cell; text-align: center; } .table li:nth-child(odd) div:nth-child(even) { background: #beffee; } .table li:nth-child(even) div:nth-child(even) { background: #bec3ff; }Copy after login方法八、css3选择器nth-child();
原理
利用css的选择器，选择对应个数的li，设置特殊样式。
不足（缺点）
li必须要设置固定的宽高，且ul也要设置固定宽高，以强制似的li“归位”。
关键点
li.nth-child(3n):控制第3以及3的倍数的li的右边距不存在。
关键代码
<ul class="lists"> <li class="list list1">1</li> <li class="list list2">2</li> <li class="list list3">3</li> <li class="list list4">4</li> <li class="list list5">5</li> <li class="list list6">6</li> <li class="list list7">7</li> <li class="list list8">8</li> <li class="list list9">9</li> </ul>Copy after loginul,li{ list-style: none; overflow: hidden; } ul{ width: 620px; } li.list{ float: left; width: 200px; height: 200px; margin-right: 10px; margin-bottom: 10px; background: #eee; } li:nth-child(3n){ margin-right: 0; }Copy after login以上，几乎都没有考虑兼容性。因为很多css3方法，掰着脚指头想兼容性也不会如你意。
如果pc求稳，就用前几招。
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