css学习笔记-grid布局

概述

1.flex布局是一维布局，grid布局是二维布局.

2.flex考虑的是项目按行或列布局，grid布局需要同时考虑行和列.

flex布局：

grid布局：

基本概念

grid-template-columns可以设置容器的列数以及相应列的宽度

grid-template-rows可以设置容器的行数以及相应行的高度

可以按照像素设置行列的宽高，也可以按照比例来设置(fr)

容器属性

与flex属性相似

1.justify-items

单元格内元素在单元格中的横向排列方式(包括start，center，end等)

<div class="container">
        <div class="item">1div>
        <div class="item">2div>
        <div class="item">3div>
        <div class="item">4div>
        <div class="item">5div>
        <div class="item">6div>
        <div class="item">7div>
        <div class="item">8div>
        <div class="item">9div>
    div>

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    justify-items: start;
    /* align-items: center; */
}
.item{
    border: 1px solid red;
}

2.align-items

单元格内元素在单元格中的纵向排列方式(包括start，center，end等)

   <div class="container">
        <div class="item">1div>
        <div class="item">2div>
        <div class="item">3div>
        <div class="item">4div>
        <div class="item">5div>
        <div class="item">6div>
        <div class="item">7div>
        <div class="item">8div>
        <div class="item">9div>
    div>

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    /*justify-items: start;*/
     align-items: center; 
}
.item{
    border: 1px solid red;
}

3.justify-content

整个单元格在整个容器中的横向排列方式(包括start，center，end等)

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    /* justify-items: start; */
    /* align-items: center; */
    justify-content: center;
}
.item{
    border: 1px solid red;
}

4.align-content

整个单元格在整个容器中的纵向排列方式(包括start，center，end等)

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    /* justify-items: start; */
    /* align-items: center; */
    /* justify-content: center; */
    align-content: center;
}
.item{
  

5.grid-auto-columns

设置溢出列的尺寸

6.grid-auto-rows

设置溢出行的尺寸

项目属性

1.grid-column

合并单元格的列

<div class="container">
        <div class="big item">1div>
        <div class="item">2div>
        <div class="item">3div>
        <div class="item">4div>
        <div class="item">5div>
        <div class="item">6div>
        <div class="item">7div>
        <div class="item">8div>
        <div class="item">9div>
    div>

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    /* justify-items: start; */
    /* align-items: center; */
    /* justify-content: center; */
    align-content: center;
}
.big{
    grid-column: 1 / 3;
}
.item{
    border: 1px solid red;
}

2.grid-row

合并单元格的行

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    /* justify-items: start; */
    /* align-items: center; */
    /* justify-content: center; */
    align-content: center;
}
.big{
    grid-column: 1 / 3;
    grid-row: 1 / 3;
}
.item{
    border: 1px solid red;
}

3.justify-self

与justify-item类似，区别是justify-items作用在整个容器，justify-self作用在具体的元素

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    /* justify-items: start; */
    /* align-items: center; */
    /* justify-content: center; */
    align-content: center;
}
.big{
    grid-column: 1 / 3;
    grid-row: 1 / 3;
    justify-self: start;
}
.item{
    border: 1px solid red;
}

4.align-self

与align-item类似，区别是align-items作用在整个容器，align-self作用在具体的元素

举例

1.用grid布局画出一个九宫格

<div class="container">
        <div class="item">1div>
        <div class="item">2div>
        <div class="item">3div>
        <div class="item">4div>
        <div class="item">5div>
        <div class="item">6div>
        <div class="item">7div>
        <div class="item">8div>
        <div class="item">9div>
    div>

.container{
    width: 800px;
    height: 500px;
    margin: 200px auto;
    border: 1px solid red;
    display: grid;
    grid-template-columns:100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
}
.item{
    border: 1px solid red;
}

2.实现一个页面布局效果

 <div class="container">
        <div class="item header">headerdiv>
        <div class="item doc">docdiv>
        <div class="item blogs">blogsdiv>
        <div class="item videos">videosdiv>
        <div class="item aside">asidediv>
        <div class="item footer">footerdiv>
    div>

    .container{
        display: grid;
        height: 800px;
        width: 800px;
        margin: 200px auto;
        border: 1px solid red;
        grid-template-columns: 400px 150px;
        grid-template-rows: 50px 100px 100px 100px 50px;
    }
    .item{
        border: 1px solid red;
    }
    .header{
        grid-column: 1 / 3;
    }
    .aside{
        grid-row: 2 / 4;
        grid-column: 2 / 3;
    }
    .blogs{

    }
    .footer{
        grid-column: 1 / 3
    }
    .videos{
        grid-template-columns: 1 / 2;
    }