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.eleventy.js
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.eleventy.js
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const { DateTime } = require("luxon");
const fs = require("fs");
const pluginRss = require("@11ty/eleventy-plugin-rss");
const pluginSyntaxHighlight = require("@11ty/eleventy-plugin-syntaxhighlight");
const pluginNavigation = require("@11ty/eleventy-navigation");
const markdownIt = require("markdown-it");
const markdownItAnchor = require("markdown-it-anchor");
module.exports = function(eleventyConfig) {
// Add plugins
eleventyConfig.addPlugin(pluginRss);
eleventyConfig.addPlugin(pluginSyntaxHighlight);
eleventyConfig.addPlugin(pluginNavigation);
// https://www.11ty.dev/docs/data-deep-merge/
eleventyConfig.setDataDeepMerge(true);
// Alias `layout: post` to `layout: layouts/post.njk`
eleventyConfig.addLayoutAlias("post", "layouts/post.njk");
eleventyConfig.addFilter("readableDate", dateObj => {
return DateTime.fromJSDate(dateObj, {zone: 'utc'}).toFormat("dd LLL yyyy");
});
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#valid-date-string
eleventyConfig.addFilter('htmlDateString', (dateObj) => {
return DateTime.fromJSDate(dateObj, {zone: 'utc'}).toFormat('yyyy-LL-dd');
});
// Get the first `n` elements of a collection.
eleventyConfig.addFilter("head", (array, n) => {
if(!Array.isArray(array) || array.length === 0) {
return [];
}
if( n < 0 ) {
return array.slice(n);
}
return array.slice(0, n);
});
// Return the smallest number argument
eleventyConfig.addFilter("min", (...numbers) => {
return Math.min.apply(null, numbers);
});
function filterTagList(tags) {
return (tags || []).filter(tag => ["all", "nav", "post", "posts"].indexOf(tag) === -1);
}
eleventyConfig.addFilter("filterTagList", filterTagList)
// Create an array of all tags
eleventyConfig.addCollection("tagList", function(collection) {
let tagSet = new Set();
collection.getAll().forEach(item => {
(item.data.tags || []).forEach(tag => tagSet.add(tag));
});
return filterTagList([...tagSet]);
});
// Copy the `img` and `css` folders to the output
eleventyConfig.addPassthroughCopy("img");
eleventyConfig.addPassthroughCopy("css");
// Customize Markdown library and settings:
let markdownLibrary = markdownIt({
html: true,
breaks: true,
linkify: true
}).use(markdownItAnchor, {
permalink: markdownItAnchor.permalink.ariaHidden({
placement: "after",
class: "direct-link",
symbol: "#",
level: [1,2,3,4],
}),
slugify: eleventyConfig.getFilter("slug")
});
eleventyConfig.setLibrary("md", markdownLibrary);
// Override Browsersync defaults (used only with --serve)
eleventyConfig.setBrowserSyncConfig({
callbacks: {
ready: function(err, browserSync) {
const content_404 = fs.readFileSync('_site/404.html');
browserSync.addMiddleware("*", (req, res) => {
// Provides the 404 content without redirect.
res.writeHead(404, {"Content-Type": "text/html; charset=UTF-8"});
res.write(content_404);
res.end();
});
},
},
ui: false,
ghostMode: false
});
return {
// Control which files Eleventy will process
// e.g.: *.md, *.njk, *.html, *.liquid
templateFormats: [
"md",
"njk",
"html",
"liquid"
],
// -----------------------------------------------------------------
// If your site deploys to a subdirectory, change `pathPrefix`.
// Don’t worry about leading and trailing slashes, we normalize these.
// If you don’t have a subdirectory, use "" or "/" (they do the same thing)
// This is only used for link URLs (it does not affect your file structure)
// Best paired with the `url` filter: https://www.11ty.dev/docs/filters/url/
// You can also pass this in on the command line using `--pathprefix`
// Optional (default is shown)
pathPrefix: "/",
// -----------------------------------------------------------------
// Pre-process *.md files with: (default: `liquid`)
markdownTemplateEngine: "njk",
// Pre-process *.html files with: (default: `liquid`)
htmlTemplateEngine: "njk",
// Opt-out of pre-processing global data JSON files: (default: `liquid`)
dataTemplateEngine: false,
// These are all optional (defaults are shown):
dir: {
input: ".",
includes: "_includes",
data: "_data",
output: "_site"
}
};
};