javascript - Fix div from the bottom -

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i want create section (like right section on facebook). section fixed bottom; far scroll, section scrolls. when reach bottom of section, becomes fixed , stays on screen.

i think it's not possible pure css, maybe js..

do have solution making happen ?

in advance, thanks.

using bootstrap make easier. can achieve navbar-fixed-bottom

<!doctype html>  <html lang="en">  <head>    <title>bootstrap case</title>    <meta charset="utf-8">    <meta name="viewport" content="width=device-width, initial-scale=1">    <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>    <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>  </head>  <body style="height:1500px">    <nav class="navbar-inverse navbar-fixed-bottom">    <div class="container-fluid">      <h3>hello<h3>    </div>  </nav>      <div class="container">    <h3>fixed navbar</h3>    <div class="row">      <div class="col-md-4">        <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>        <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>          </div>      <div class="col-md-4">         <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>        <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>      </div>      <div class="col-md-4">         <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>        <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>       </div>    </div>  </div>  <h1>scroll page see effect</h1>        <div class="col-md-4">         <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>        <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>       <div class="col-md-4">         <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>        <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>         <div class="col-md-4">         <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>        <p>a fixed navigation bar stays visible in fixed position (top or bottom) independent of page scroll.</p>     </body>  </html>


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