Bootstrap grid layout system example-CSS Tutorial-php.cn

Bootstrap grid layout system example

PHPz

Release： 2018-10-15 15:31:20

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1. Basic principles:

1. Think of the screen as a grid/grid/cell/composition arranged in an orderly manner along the horizontal and vertical directions;

2. All data must be placed in the grid;

3. Use responsive layout, mobile settings take priority

2. Screen resolution division basis

1. ( screen < 768px ): ultra-small screen col-xs-x

2. (768px <= screen < 992px): small screen col-sm-x

3. (992px < = screen < 1200) : medium screen col-md-x

4. (1200 <= screen ) : large screen col-lg-x

2. Implementation principle

1. The first step: a container must be created, class="container"

2. The second step: a row must be created, class="row"

3. The third step : A grid must be created, class="col-md-x", taking a medium screen as an example, the critical point is 992px

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="dist/css/bootstrap.css">
    <script src="jquery-3.2.1.js"></script>
    <script src="dist/js/bootstrap.js"></script>
    <title>栅格布局系统</title>
    <style>
        .grid {
            border: 1px solid #696969;
            border-radius: 5px;
            background-color: lightskyblue;
            min-height: 30px;
            text-align: center;
            line-height: 30px;
        }
        .green {
           background-color: lightgreen;
        }
        .pink {
            background-color: lightpink;
        }
    </style>
</head>
<body>
<div class="container">
    <h4>整行:</h4>
    <div class="row">
        <div class="col-md-12 grid">内容</div>
    </div>
    <h4>二等分:</h4>
    <div class="row">
        <!--<div class="col-md-6 grid">内容</div>-->
        <!--大屏39分-->
        <!--<div class="col-md-6 col-lg-3 grid green">内容</div>-->
        <!--小屏48分-->
        <div class="col-md-6 col-lg-3 col-sm-4 grid green">内容</div>
        <!--<div class="col-md-6 col-sm-8  grid">内容</div>-->
        <!--<div class=" col-md-6 grid">内容</div>-->
        <!--<div class=" col-md-6 col-lg-9 grid pink">内容</div>-->
        <div class=" col-md-6 col-lg-9 grid col-sm-8 pink">内容</div>
        <!--<div class=" col-md-6 col-sm-4 grid">内容</div>-->
    </div>
    <h4>三等分:</h4>
    <div class="row">
        <div class="col-md-4 grid">内容</div>
        <div class="col-md-4 grid">内容</div>
        <div class="col-md-4 grid">内容</div>
    </div>
    <h4>四等分:</h4>
    <div class="row">
        <div class="col-md-3 grid">内容</div>
        <div class="col-md-3 grid">内容</div>
        <div class="col-md-3 grid">内容</div>
        <div class="col-md-3 grid">内容</div>
    </div>
    <!--<h4>五等分:12除5除不尽,不用五等分</h4>-->
    <h4>六等分:</h4>
    <div class="row">
        <div class="col-md-2 grid">内容</div>
        <div class="col-md-2 grid">内容</div>
        <div class="col-md-2 grid">内容</div>
        <div class="col-md-2 grid">内容</div>
        <div class="col-md-2 grid">内容</div>
        <div class="col-md-2 grid">内容</div>
    </div>
    <h4>四八开:</h4>
    <div class="row">
        <div class="col-md-4 grid">内容</div>
        <div class="col-md-8 grid">内容</div>
    </div>
    <h4>三九开:</h4>
    <div class="row">
        <div class="col-md-3 grid">内容</div>
        <div class="col-md-9 grid">内容</div>
    </div>
</div>
</body>
</html>

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