Format README

README.md

@@ -19,49 +19,63 @@ deno add @vrugtehagel/eleventy-document-outline
 
 ## Config
 
-In your Eleventy configuration file (usually `.eleventy.js`), import/require the module and add the plugin using `.addPlugin()`:
+In your Eleventy configuration file (usually `.eleventy.js`), import/require the
+module and add the plugin using `.addPlugin()`:
 
 ```js
-import EleventyDocumentOutline from 'eleventy-document-outline';
-
-export default function(eleventyConfig){
-	// …
-	eleventyConfig.addPlugin(EleventyDocumentOutline, {
-		headers: ['h1', 'h2', 'h3'],
-	});
-	// …
+import EleventyDocumentOutline from "eleventy-document-outline";
+
+export default function (eleventyConfig) {
+  // …
+  eleventyConfig.addPlugin(EleventyDocumentOutline, {
+    headers: ["h1", "h2", "h3"],
+  });
+  // …
 }
 ```
 
-As shown above, there are additional options one may pass as second argument to the `.addPlugin()` call, as an object. It may have the following keys:
+As shown above, there are additional options one may pass as second argument to
+the `.addPlugin()` call, as an object. It may have the following keys:
 
-- `headers`: an array of headers to include in the document outline. By default, this is set to `['h1', 'h2', 'h3']`. Note that this can be overwritten on a case-by-case basis in the `{% outline %}` shortcode.
-- `output`: a function receiving a single argument `{ id, text, header }`. The function must return a snippet of HTML to output. By default, this is
+- `headers`: an array of headers to include in the document outline. By default,
+  this is set to `['h1', 'h2', 'h3']`. Note that this can be overwritten on a
+  case-by-case basis in the `{% outline %}` shortcode.
+- `output`: a function receiving a single argument `{ id, text, header }`. The
+  function must return a snippet of HTML to output. By default, this is
 
 ```js
-function output({ id, text, header }){
-	return `<a href="#${id}" class="link-${header}">${text}</a>`;
+function output({ id, text, header }) {
+  return `<a href="#${id}" class="link-${header}">${text}</a>`;
 }
 ```
 
-Which means the options are rendered as sibling anchor tags. The function runs once per header found, in the same order that they are found in the document. The `id` then matches the `id` attribute of the given header, the `header` matches the `.localName` (i.e. lowercased `.tagName`) and the `text` is the text found inside the header.
+Which means the options are rendered as sibling anchor tags. The function runs
+once per header found, in the same order that they are found in the document.
+The `id` then matches the `id` attribute of the given header, the `header`
+matches the `.localName` (i.e. lowercased `.tagName`) and the `text` is the text
+found inside the header.
 
 ## Usage
 
 To output the list of links, use the `{% outline %}` shortcode like so:
 
 ```liquid
-	<nav id="doc-outline">
-		{% outline "h2", "h3" %}
-	</nav>
+<nav id="doc-outline">
+	{% outline "h2", "h3" %}
+</nav>
 ```
 
-In this case, only the `h2` and `h3` elements (with `id` attributes) are included in the outline. If the arguments are left out, as in `{% outline %}`, then the default headers as configured are used (if not explicityly configured, only `h1`, `h2` and `h3` elements are included).
+In this case, only the `h2` and `h3` elements (with `id` attributes) are
+included in the outline. If the arguments are left out, as in `{% outline %}`,
+then the default headers as configured are used (if not explicityly configured,
+only `h1`, `h2` and `h3` elements are included).
 
 ### Excluding a header
 
 To exclude a header, add a `data-outline-ignore` attribute to it.
 
 ### Generating header ids
 
-This plugin does not automatically generate `id` attributes for your headers. If this is something you want or need, use a separate plugin to generate them, such as e.g. [markdown-it-anchor](https://www.npmjs.com/package/markdown-it-anchor).
+This plugin does not automatically generate `id` attributes for your headers. If
+this is something you want or need, use a separate plugin to generate them, such
+as e.g. [markdown-it-anchor](https://www.npmjs.com/package/markdown-it-anchor).