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90 lines
3.1 KiB
Markdown
90 lines
3.1 KiB
Markdown
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# Table of Contents jQuery Plugin - jquery.toc
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A minimal, tiny jQuery plugin that will generate a table of contents, drawing from headings on the
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page.
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The generated TOCs are semantic, nested lists (`ul` or `ol`) with hash-link anchors to the headings.
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## Usage
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You can [download the latest release](http://ndabas.github.com/toc/assets/jquery.toc.zip), or
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install with Twitter's [Bower](http://twitter.github.com/bower): `bower install jquery.toc`.
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Include jQuery (>= 1.6) and jquery.toc.js/jquery.toc.min.js on your page. The plugin can then be
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used either via HTML5 data attributes, or via the programmatic API. See below for the available
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options.
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### Via data attributes
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Minimal example:
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<ul data-toc></ul>
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With options:
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<ol data-toc="div.container" data-toc-headings="h2,h3,h4"></ol>
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### Via the JavaScript programmatic API
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Minimal example:
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<ul id="toc"></ul>
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...
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<script type="text/javascript">
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$("#toc").toc();
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</script>
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With options:
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<ul id="toc"></ul>
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...
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<script type="text/javascript">
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$("#toc").toc({content: "div.container", headings: "h2,h3,h4"});
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</script>
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### Options
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<ul data-toc="content" data-toc-headings="headings"></ul>
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$(...).toc({content: "body", headings: "h1,h2,h3"});
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The plugin has two options:
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* `content` is a selector where the plugin will look for headings to build up the TOC. The default
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value is `"body"`.
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* `headings` is a string with a comma-separated list of selectors to be used as headings, in the
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order which defines their relative hierarchy level. The default value of `"h1,h2,h3"` will select
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all `h1`, `h2`, and `h3` elements to build the TOC, with `h1` being a level 1, `h2` a level 2, and
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so on. You can use any valid list of jQuery selectors; for example, if you just want `h1` tags
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with a specific class, and no `h3` tags, you could use `"h1.title,h2"` for this parameter.
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In addition, the plugin will create nested lists of the same type (`ul` or `ol`) as the element that
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it is called on.
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### Automatic ID generation
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The plugin generates hash-links to the headings on the page, to allow users to jump to the heading
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by clicking in the generated table of contents. This feature requires that the headings have IDs
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assigned; if they do not, the plugin will generate and assign IDs automatically.
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The generated IDs are based on the text inside the headings, and uses two simple rules:
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* The ID must begin with a letter; so any non-letter (`[^A-Za-z]`) characters are discarded from the
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beginning of the string.
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* For the rest of the ID, only letters and numbers are used from the heading text; all other
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characters (`[^A-Za-z0-9]`) are converted to underscores.
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For example, a heading like `<h2>Heading 2.1</h2>` will get the ID `Heading_2_1`.
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## Alternatives
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If you're looking for a jQuery plugin that does more than just generate a minimal table of contents,
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the project wiki [lists some more plugins](https://github.com/ndabas/toc/wiki/Alternatives).
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## License
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Licensed under the [Apache License, version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
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## Credits
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Created by [Nikhil Dabas](http://www.nikhildabas.com/).
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