css中grid属性的作用是什么
这篇文章给大家介绍css中grid属性的作用是什么,内容非常详细,感兴趣的小伙伴们可以参考借鉴,希望对大家能有所帮助。
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grid布局
加在父元素上的属性
grid-template-columns/grid-template-rows
定义元素的行或列的宽高
如果父元素被等分成了9等分,则,不管有多少个子元素,都显示9等分
grid-template-columns: 33% 33% 33%;可以写成grid-template-columns:repeat(3, 33%);
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container1 { grid-template-columns: 33% 33% 33%; grid-template-rows: 33% 33% 33%; }
grid-template-areas
父元素的grid-template-areas配合子元素的grid-area定义网格区域
一个句点表示一个空的网格单元
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container2 { grid-template-columns: 1fr 1fr 1fr 1fr; grid-template-rows: 1fr 1fr 1fr; grid-template-areas: "header header . footer" "main main . sidebar" "main main . sidebar"; } .container2 .item-1 { grid-area: header; } .container2 .item-2 { grid-area: main; } .container2 .item-3 { grid-area: sidebar; } .container2 .item-4 { grid-area: footer; }
headermainsidebarfooter
grid-column-gap/grid-row-gap/grip-gap
指网格线的大小,也可以说是网格子项之间的间距
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container3 { grid-template-columns: repeat(3, 30%); grid-template-rows: repeat(3, 30%); grid-column-gap: 2%; grid-row-gap: 2%; }
justify-items/align-itemsjustify-items
让子元素的内容和纵向列轴对齐
align-items让子元素的内容和横向行轴对齐
两个属性都有四个值
我的例子中,为了方便对比,嵌套了grid网格
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container4 { width: 400px; height: 200px; grid-template-columns: repeat(4, 25%); grid-template-rows: repeat(2, 50%); } .container4 .item { display: grid; } .container4 .item div { background-color: coral; border: 1px dashed #aaa } .container4 .item-1 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); justify-items: start; } .container4 .item-2 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); justify-items: end; } .container4 .item-3 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); justify-items: center; } .container4 .item-4 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); justify-items: stretch; } .container4 .item-5 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); align-items: start; } .container4 .item-6 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); align-items: end; } .container4 .item-7 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); align-items: center; } .container4 .item-8 { grid-template-columns: repeat(2, 50%); grid-template-rows: repeat(2, 50%); align-items: stretch; }
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设置子元素的对齐方式,justify表示纵向,align表示横向
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container5 { width: 700px; height: 200px; grid-template-columns: repeat(7, 14%); grid-template-rows: repeat(2, 50%); } .container5 .item { display: grid; } .container5 .item div { background-color: coral; border: 1px dashed #aaa } .container5 .item-1 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); justify-content: start; } .container5 .item-2 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); justify-content: end; } .container5 .item-3 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); justify-content: center; } .container5 .item-4 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); justify-content: stretch; } .container5 .item-5 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); justify-content: space-around; } .container5 .item-6 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); justify-content: space-between; } .container5 .item-7 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); justify-content: space-evenly; } .container5 .item-8 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); align-content: start; } .container5 .item-9 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); align-content: end; } .container5 .item-10 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); align-content: center; } .container5 .item-11 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); align-content: stretch; } .container5 .item-12 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); align-content: space-around; } .container5 .item-13 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); align-content: space-between; } .container5 .item-14 { grid-template-columns: repeat(2, 40%); grid-template-rows: repeat(2, 40%); align-content: space-evenly; }listlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistlistgrid-auto-columns/grid-auto-rowsgrid-column
后面的值如果是1 / 2形式,表示的是从第1列网格线开始到第2列网格线结束,如果这个属性定义的网格超出了父元素的范围,则会自动生成隐式网格
grid-auto-columns和grid-auto-rows两个属性来指定这些隐式网格轨迹的宽度
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container6 { width: 120px; height: 180px; grid-template-columns: 60px 60px; grid-template-rows: 90px 90px; grid-auto-columns: 60px; } .container6 .item-1 { grid-column: 1 / 2; grid-row: 2 / 3; border: 1px solid #ccc; } .container6 .item-2 { grid-column: 5 / 6; grid-row: 2 / 3; border: 1px solid #ccc; }1/2&2/35/6&2/3grid-auto-flow
没有网格元素的时候,自动排列
row表示从左到右排列,column表示从上到下排列
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container7 { display: grid; width: 200px; height: 40px; grid-template-columns: 40px 40px 40px 40px 40px; grid-template-rows: 40px 40px; /* grid-auto-flow: row; */ grid-auto-flow: column; } .container7 .item-1 { grid-column: 1; grid-row: 1 / 3; } .container7 .item-5 { grid-column: 5; grid-row: 1 / 3; }12345加在子元素上的属性
grid-column-start/grid-column-end/grid-row-start/grid-row-end/grid-column/grid-row
定义网格开始或者结束的位置
值为数字,表示从这条线开始。值为span加数字,表示覆盖了这条线的位置
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container8 { margin-top: 20px; grid-template-columns: repeat(5, 20%); grid-template-rows: repeat(5, 20%); } .container8 .item-1 { grid-column-start: 2; grid-column-end: 4; grid-row-start: 1; grid-row-end: 2; } .container8 .item-2 { grid-column-start: 4; grid-column-end: span 5; grid-row-start: 2; grid-row-end: span 5; } .container8 .item-3 { grid-column: 1 / span 2; grid-row: 2 / span 4; }item-1item-2item-3justify-self/align-self
网格子项内容与格线对齐
.container { width: 200px; height: 200px; display: grid; background-color: coral; margin: 10px; } .container .item { border: 1px solid #ccc; background-color: chocolate; } .container9 { width: 400px; height: 200px; grid-template-columns: repeat(4, 25%); grid-template-rows: repeat(2, 50%); } .container9 .item-1 { justify-self: start; } .container9 .item-2 { justify-self: end; } .container9 .item-3 { justify-self: center; } .container9 .item-4 { justify-self: stretch; } .container9 .item-5 { align-self: start; } .container9 .item-6 { align-self: end; } .container9 .item-7 { align-self: center; } .container9 .item-8 { align-self: stretch; }item-1item-2item-3item-4item-5item-6item-7item-8css的基本语法是什么
css的基本语法是:1、css规则由选择器和一条或多条声明两个部分构成;2、选择器通常是需要改变样式的HTML元素;3、每条声明由一个属性和一个值组成;4、属性和属性值被冒号分隔开。
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