Add line numbers to the code block generated by markdown

add-line-numbers-to-the-code-block-generated-by-markdown.markdown

Add line numbers to the code block generated by markdown

A Pen by Heiswayi Nrird on CodePen.

License.

index.markdown

<?php
header('Content-type: text/css');
ob_start("compress");

  function compress($buffer) {
    /* remove comments */
      $buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);

      /* remove tabs, spaces, newlines, etc. */
      $buffer = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $buffer);

      return $buffer;
  }

  /* css files for compression */
  include('grid.css');
  include('typography.css');
  include('button.css');
  include('form.css');
  include('table.css');
  include('backgrounds.css');
  include('pagination.css');
  include('breadcrumbs.css');
  include('font.css');
  include('helpers.css');
  include('print.css');
  include('animation.css');
  include('responsive.css');

ob_end_flush();
?>

script.js

(function() {
  var pre = document.getElementsByTagName('pre'),
    pl = pre.length;
  for (var i = 0; i < pl; i++) {
    pre[i].innerHTML = '<span class="line-number"></span>' + pre[i].innerHTML + '<span class="cl"></span>';
    var num = pre[i].innerHTML.split(/\n/).length;
    for (var j = 0; j < (num); j++) {
      var line_num = pre[i].getElementsByTagName('span')[0];
      line_num.innerHTML += '<span>' + (j + 1) + '</span>';
    }
  }
})();

style.scss

body {
  padding: 100px;
  font-size: 16px;
}
pre {
  display: block;
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 0.7rem;
  line-height: 1.4;
  white-space: pre;
  overflow: auto;
  background-color: #f9f9f9;
  border: 1px solid #ddd;
  padding: .5rem;
  max-height: 800px;
  font-family: monospace;
  code {
    color: inherit;
    background-color: transparent;
    padding: 0;
    display: block;
  }
  .line-number {
    display: block;
    float: left;
    margin: 0 1em 0 -1em;
    border-right: 1px solid #ddd;
    text-align: right;
    span {
      display: block;
      padding: 0 .5em 0 1em;
      color: #ccc;
    }
  }
  .cl {
    display: block;
    clear: both;
  }
}

      -webkit-touch-callout: none;
      -webkit-user-select: none;
      -khtml-user-select: none;
      -moz-user-select: none;
      -ms-user-select: none;
      user-select: none;

for copy button

Note: Not JQuery...