bootstrap栅格系统响应式_bootstrap

小于768的手机端：col-xs

大于768小于992的平板：col-sm

大于992小于1200：col-md

大于1200：col-lg

<!DOCTYPE html><html>
    <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>我是中国人title>

         新 Bootstrap 核心 CSS 文件 -->
        <link href="css/bootstrap.min.css" rel="stylesheet">

         最新的 Bootstrap 核心 JavaScript 文件 -->
        <script src="js/bootstrap.min.js">script>

        <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js">script>

        <style>
            div[class|=col] {
                border: 1px solid;
            }
        style>
    head>
    <body>
        <div id="" class="container-fluid">
            <div id="" class="row">
                <div class="col-md-3 col-sm-4 col-xs-6">.col-md-1div>
                <div class="col-md-3 col-sm-4 col-xs-6">.col-md-1div>
                <div class="col-md-3 col-sm-4 col-xs-6">.col-md-1div>
                <div class="col-md-3 col-sm-4 col-xs-6">.col-md-1div>
                <div class="col-md-3 col-sm-4 col-xs-6">.col-md-1div>
                <div class="col-md-3 col-sm-4 col-xs-6">.col-md-1div>
            div>
        div>
    body>html>

bootstrap栅格系统响应式_bootstrap_02bootstrap栅格系统响应式_bootstrap_03