How to create a table of contents to Jekyll blog post?

Question

If I have a page/post in Jekyll with headers, is it possible to auto-generate a table-of-contents/outline for navigation? Something akin to the top matter of a Wikipedia article.

Answer 1

That is the markup parser's task.

In case of Markdown one of the syntax extensions defines Automatic generation of the table of contents:

* This will become a table of contents (this text will be scrapped).
{:toc}

This works in Maruku and kramdown.

Answer 2

I have TOC for Jekyll blog which looks similar to Wikipedia TOC

So all my Jekyll posts have a Table of Contents section. It can be done just using kramdown.

Use this code inside your post where you want the TOC to appear

* Do not remove this line (it will not be displayed)
{:toc}

And use this CSS to style it like Wikipedia TOC

// Adding 'Contents' headline to the TOC
#markdown-toc::before {
    content: "Contents";
    font-weight: bold;
}


// Using numbers instead of bullets for listing
#markdown-toc ul {
    list-style: decimal;
}

#markdown-toc {
    border: 1px solid #aaa;
    padding: 1.5em;
    list-style: decimal;
    display: inline-block;
}

Use appropriate colors that suit your blog.

That is it!

TOC can also be done with the help of jekyll-table-of-contents, if in any case the above method doesn't work. This one uses Jquery and a js file.

Here is the detailed guide on how I did it: Jekyll TOC

Answer 3

I'm assuming you mean a list of all H1, H2 elements etc in the content itself? I don't think Jekyll has anything built-in to handle that. I suspect the easiest way is to let Javascript generate it for you once the page has rendered, using something like this jQuery plugin, or one of the many other plugins/snippets available.

Answer 4

you can use this code before your contents.

<link rel="stylesheet" href="http://yandex.st/highlightjs/6.2/styles/googlecode.min.css">

<script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<script src="http://yandex.st/highlightjs/6.2/highlight.min.js"></script>

<script>hljs.initHighlightingOnLoad();</script>
<script type="text/javascript">
 $(document).ready(function(){
      $("h2,h3,h4,h5,h6").each(function(i,item){
        var tag = $(item).get(0).localName;
        $(item).attr("id","wow"+i);
        $("#category").append('<a class="new'+tag+'" href="#wow'+i+'">'+$(this).text()+'</a></br>');
        $(".newh2").css("margin-left",0);
        $(".newh3").css("margin-left",20);
        $(".newh4").css("margin-left",40);
        $(".newh5").css("margin-left",60);
        $(".newh6").css("margin-left",80);
      });
 });
</script>
<div id="category"></div>

Answer 5

https://github.com/allejo/jekyll-toc provides very easy way to add TOC to your jekyll page.

1. Download the latest toc.html file (caution! should be raw file)
2. copy this file to _includes folder.
3. add this line before {{content}}: {% include toc.html html=content %}