在Bootstrap 4的不同屏幕上从头开始对齐单行项目

在Bootstrap 4中使用.align-items-*-start类在不同屏幕上从开始对齐项目的单行。

对于不同的屏幕尺寸,将该类用作-

在小屏幕上对齐单行项目

<div class="d-flex flex-wrap align-items-sm-start bg-secondary" style="height:200px">
  <div class="p-2 border">Product 1</div>
  <div class="p-2 border">Product 2</div>
  <div class="p-2 border">Product 3</div>
  <div class="p-2 border">Product 4</div>
</div>

在中等屏幕上对齐单行项目

<div class="d-flex flex-wrap align-items-md-start bg-primary" style="height:200px">
  <div class="p-2 border">Product 1</div>
  <div class="p-2 border">Product 2</div>
  <div class="p-2 border">Product 3</div>
  <div class="p-2 border">Product 4</div>
</div>

在大屏幕上对齐单行项目

<div class="d-flex flex-wrap align-items-lg-start bg-info" style="height:200px">
  <div class="p-2 border">Product 1</div>
  <div class="p-2 border">Product 2</div>
  <div class="p-2 border">Product 3</div>
  <div class="p-2 border">Product 4</div>
</div>

以下是在不同屏幕上从头开始对齐单行项目的示例-

示例

<!DOCTYPE html>
<html>
  <head>
    <title>Bootstrap Example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
    <script src="https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
  </head>
  <body>
    <div class="container mt-3">
      <h1>Align Flex Items on a single row</h1>
      <div class="d-flex flex-wrap align-items-start bg-primary" style="height:200px">
        <div class="p-2 border">Product 1</div>
        <div class="p-2 border">Product 2</div>
        <div class="p-2 border">Product 3</div>
        <div class="p-2 border">Product 4</div>
      </div>
      <h2>Small Screen Size</h2>
      <div class="d-flex flex-wrap align-items-sm-start bg-secondary" style="height:200px">
        <div class="p-2 border">Product 1</div>
        <div class="p-2 border">Product 2</div>
        <div class="p-2 border">Product 3</div>
        <div class="p-2 border">Product 4</div>
      </div>
      <h2>Medium Screen Size</h2>
      <div class="d-flex flex-wrap align-items-md-start bg-primary" style="height:200px">
        <div class="p-2 border">Product 1</div>
        <div class="p-2 border">Product 2</div>
        <div class="p-2 border">Product 3</div>
        <div class="p-2 border">Product 4</div>
      </div>
      <h2>Large Screen Size</h2>
      <div class="d-flex flex-wrap align-items-lg-start bg-info" style="height:200px">
        <div class="p-2 border">Product 1</div>
        <div class="p-2 border">Product 2</div>
        <div class="p-2 border">Product 3</div>
        <div class="p-2 border">Product 4</div>
      </div>
   </div>

</body>
</html>