A simple, ready to use javascript to add auto generated, super customizable Table Of Content to any page element. You can see an example of what it does at https://alf3run.github.io/TOC-Generator.

1. Ready to use: no need to write javascript code, only html is required;
2. Your style: add your own style with CSS just the way you're used to do;
3. No 3rd party dependencies: it's written in plain javascript and css so you don't need to import any other libraries such as jQuery, etc;
4. Modular javascript code: you can choose the feature you want to include by deleting or commenting the relative functions.

The TOC-Generator make use of data-toc attribute to determine its parent element. Then, it select all the <h(n)> tag inside and insert a hierarchically ordered list made out of them to the parent's top. Every tabel of content generated this way has a default id="toc-(nth)", where (nth) is an integer corresponding to the nth generated table, and a default class="toc-default".

The toc.css contains some basic styling rules to make the TOC-Generator ready to use but you can customize it the way you like by modifying the file, overriding the .toc-default class in an external css, or adding your own class using the TOC-Generator Options below.

Just put the js and css folders or their content inside your project root direcotry, then import the toc.css and toc.js in your .html file. Now the TOC-Generator is ready to use.

In your .html file chose the element you want the table of content generated for and add the attribute data-toc to it. For example:

<div data-toc>
  <h2>Title 1</h2>
  <h3>Title 2</h3>
  <h2>Title 3</h2>
  <!-- more content -->
</div>

You can modify some aspects of the generated tabel of content by adding the data- attribute below to the same element where data-toc is:

1. data-toc-id - overrides the default toc generated id if setted to a not empty value;
2. data-toc-class - allows to add any custom class to your generated table of content. It does not override the default .toc-default class;
3. data-toc-header - overrides the default toc header with a user defined one. If set to none (not case sensitive!) it will remove the header;
4. data-toc-parent-id - allows the user to set the element the toc will be appended to by specifying its id.