Bootstrap .btn-block类

!DOCTYPE htmlhtmlheadtitleBootstrap Example/titlemeta name = viewport content = width=device-width, initial-scale = 1

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<!DOCTYPE HTML>
<HTML>
   <head>
      <Title>bootstrap Example</Title>
      <Meta name = "vIEwport" content = "wIDth=device-wIDth, initial-scale = 1">
      <link rel = "stylesheet" href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/CSS/bootstrap.min.CSS">
      <script src = "https://AJAX.GoogleAPIs.com/AJAX/libs/jquery/3.3.1/jquery.min.Js"></script>
      <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/Js/bootstrap.min.Js"></script>
   </head>
   <body>
      <p>The following are block level buttons:</p>
      <button type = "button" class = "btn btn-primary btn-lg btn-block">
         Block level Primary button
      </button>
      <button type = "button" class = "btn btn-default btn-lg btn-block">
         Block level button
      </button>
   </body>
</HTML>

本文标题为:Bootstrap .btn-block类

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