https://thepoetcoder.github.io/assets/js/script.js

1(function($) {
2$(document).ready(function(){
3
4  // putting lines by the pre blocks
5  $("pre").each(function(){
6    var pre = $(this).text().split("\n");
7    var lines = new Array(pre.length+1);
8    for(var i = 0; i < pre.length; i++) {
9      var wrap = Math.floor(pre[i].split("").length / 70)
10      if (pre[i]==""&&i==pre.length-1) {
11        lines.splice(i, 1);
12      } else {
13        lines[i] = i+1;
14        for(var j = 0; j < wrap; j++) {
15          lines[i] += "\n";
16        }
17      }
18    }
19    $(this).before("<pre class='lines'>" + lines.join("\n") + "</pre>");
20  });
21
22  var headings = [];
23
24  var collectHeaders = function(){
25    headings.push({"top":$(this).offset().top - 15,"text":$(this).text()});
26  }
27
28  if($(".markdown-body h1").length > 1) $(".markdown-body h1").each(collectHeaders)
29  else if($(".markdown-body h2").length > 1) $(".markdown-body h2").each(collectHeaders)
30  else if($(".markdown-body h3").length > 1) $(".markdown-body h3").each(collectHeaders)
31
32  $(window).scroll(function(){
33    if(headings.length==0) return true;
34    var scrolltop = $(window).scrollTop() || 0;
35    if(headings[0] && scrolltop < headings[0].top) {
36      $(".current-section").css({"opacity":0,"visibility":"hidden"});
37      return false;
38    }
39    $(".current-section").css({"opacity":1,"visibility":"visible"});
40    for(var i in headings) {
41      if(scrolltop >= headings[i].top) {
42        $(".current-section .name").text(headings[i].text);
43      }
44    }
45  });
46
47  $(".current-section a").click(function(){
48    $(window).scrollTop(0);
49    return false;
50  })
51});
52})(jQuery)