eleventy.config.js

const { DateTime } = require("luxon")
const fs = require("node:fs")
const { EleventyHtmlBasePlugin } = require("@11ty/eleventy")
const { EleventyRenderPlugin } = require("@11ty/eleventy")

const pluginRss = require("@11ty/eleventy-plugin-rss")
const pluginNavigation = require("@11ty/eleventy-navigation")
const bundlerPlugin = require("@11ty/eleventy-plugin-bundle")
const svgSprite = require("eleventy-plugin-svg-sprite")

module.exports = function (eleventyConfig) {
	// PassThroughCopy
	eleventyConfig.addPassthroughCopy({
		"./public/": "/",
		"node_modules/magic-grid/dist/magic-grid.min.js": "js/magic-grid.min.js",
	})
	eleventyConfig.addPassthroughCopy("./content/**/*.jpg")

	// Watch content images for the image pipeline.
	eleventyConfig.addWatchTarget("content/**/*.{svg,webp,png,jpeg,jpg}")

	// App plugins
	eleventyConfig.addPlugin(require("./eleventy.config.drafts.js"))
	eleventyConfig.addPlugin(require("./eleventy.config.images.js"))

	// Official plugins
	eleventyConfig.addPlugin(pluginRss)
	eleventyConfig.addPlugin(pluginNavigation)
	eleventyConfig.addPlugin(EleventyHtmlBasePlugin)
	eleventyConfig.addPlugin(EleventyRenderPlugin)
	eleventyConfig.addPlugin(bundlerPlugin)

	// Community plugins
	eleventyConfig.addPlugin(svgSprite, {
		path: "./public/img/sprite",
	})

	// Filters
	eleventyConfig.addFilter("readableDate", (date) => {
		const dateObj = new Date(date)
		return dateObj.toLocaleDateString("en-US", {
			year: "numeric",
			month: "long",
			day: "numeric",
		})
	})

	eleventyConfig.addFilter("htmlDateString", (dateObj) => {
		return DateTime.fromJSDate(dateObj, { zone: "utc" }).toFormat("yyyy-LL-dd")
	})

	// Return all the tags used in a collection
	eleventyConfig.addFilter("getAllTags", (collection) => {
		let tagSet = new Set()
		for (let item of collection) {
			;(item.data.tags || []).forEach((tag) => tagSet.add(tag))
		}
		return Array.from(tagSet)
	})

	eleventyConfig.addFilter("filterTagList", function filterTagList(tags) {
		return (tags || []).filter(
			(tag) => ["all", "nav", "post", "posts"].indexOf(tag) === -1,
		)
	})

	eleventyConfig.addFilter(
		"filterTagSeries",
		function filterTagSeries(tags, series) {
			return (tags || []).filter((tag) => series.indexOf(tag) === -1)
		},
	)

	eleventyConfig.addFilter("fsExists", function (filename) {
		return fs.existsSync(filename)
	})

	return {
		templateFormats: ["md", "njk", "html"],
		markdownTemplateEngine: "njk",
		htmlTemplateEngine: "njk",
		dir: {
			input: "content",
			includes: "../_includes",
			data: "../_data",
			output: "_site",
		},
		pathPrefix: "/",
	}
}