eleventy.config.js

import { IdAttributePlugin, InputPathToUrlTransformPlugin, HtmlBasePlugin } from "@11ty/eleventy";
import { feedPlugin } from "@11ty/eleventy-plugin-rss";
import pluginSyntaxHighlight from "@11ty/eleventy-plugin-syntaxhighlight";
import pluginNavigation from "@11ty/eleventy-navigation";
import { eleventyImageTransformPlugin } from "@11ty/eleventy-img";
import pluginFilters from "./_config/filters.js";

/** @param {import("@11ty/eleventy").UserConfig} eleventyConfig */
export default async function (eleventyConfig) {
	// Drafts, see also _data/eleventyDataSchema.js
	eleventyConfig.addPreprocessor("drafts", "*", (data, content) => {
		if (data.draft && process.env.ELEVENTY_RUN_MODE === "build") {
			return false;
		}
	});

	// Copy the contents of the `public` folder to the output folder
	// For example, `./public/css/` ends up in `_site/css/`
	eleventyConfig
		.addPassthroughCopy({
			"./public/": "/"
		})
		.addPassthroughCopy("./content/feed/pretty-atom-feed.xsl");

	// Decap CMS
	eleventyConfig.addPassthroughCopy("admin");

	// JS
	eleventyConfig.addPassthroughCopy("bundle.js");

	// Run Eleventy when these files change:
	// https://www.11ty.dev/docs/watch-serve/#add-your-own-watch-targets

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

	// Per-page bundles, see https://github.com/11ty/eleventy-plugin-bundle
	// Adds the {% css %} paired shortcode
	eleventyConfig.addBundle("css", {
		toFileDirectory: "dist",
	});
	// Adds the {% js %} paired shortcode
	eleventyConfig.addBundle("js", {
		toFileDirectory: "dist",
	});

	// Official plugins
	eleventyConfig.addPlugin(pluginSyntaxHighlight, {
		preAttributes: { tabindex: 0 }
	});
	eleventyConfig.addPlugin(pluginNavigation);
	eleventyConfig.addPlugin(HtmlBasePlugin);
	eleventyConfig.addPlugin(InputPathToUrlTransformPlugin);

	eleventyConfig.addPlugin(feedPlugin, {
		type: "atom", // or "rss", "json"
		outputPath: "/feed/feed.xml",
		stylesheet: "pretty-atom-feed.xsl",
		templateData: {
			eleventyNavigation: {
				key: "Feed",
				order: 4
			}
		},
		collection: {
			name: "posts",
			limit: 10,
		},
		metadata: {
			language: "en",
			title: "Darren Griffin",
			subtitle: "Smart Home Enthusiast, Tennis Player, Web Developer",
			base: "https://mrdarrengriffin.com/",
			author: {
				name: "Darren Griffin",
			}
		}
	});

	// Image optimization: https://www.11ty.dev/docs/plugins/image/#eleventy-transform
	eleventyConfig.addPlugin(eleventyImageTransformPlugin, {
		// File extensions to process in _site folder
		extensions: "html",
		widths: [300, 600, 768],
		// Output formats for each image.
		formats: ["webp", "avif", "auto"],
		defaultAttributes: {
			// e.g. <img loading decoding> assigned on the HTML tag will override these values.
			loading: "lazy",
			decoding: "async",
			sizes: "100vw",
			alt: ""
		}
	});

	// Filters
	eleventyConfig.addPlugin(pluginFilters);

	eleventyConfig.addPlugin(IdAttributePlugin, {
		// by default we use Eleventy’s built-in `slugify` filter:
		// slugify: eleventyConfig.getFilter("slugify"),
		// selector: "h1,h2,h3,h4,h5,h6", // default
	});

	eleventyConfig.addShortcode("currentBuildDate", () => {
		return (new Date()).toISOString();
	});

	// eleventy transformer, convert iframe attributes (src) to data-src
	eleventyConfig.addTransform("iframe-lazy-load", (content, outputPath) => {
		if (outputPath.endsWith(".html")) {
			// get all iframes
			const iframes = content.match(/<iframe[^>]+>/g);
			// foreach iframe...
			if (iframes) {
				iframes.forEach(iframe => {
					// get the src attribute
					const src = iframe.match(/src="([^"]+)"/);
					if (src) {
						// replace src with data-src
						content = content.replace(src[0], `data-src="${src[1]}"`);
					}
				});
			}
		}
		console.log("iframe-lazy-load", outputPath);
		return content;
	});

	// Features to make your build faster (when you need them)

	// If your passthrough copy gets heavy and cumbersome, add this line
	// to emulate the file copy on the dev server. Learn more:
	// https://www.11ty.dev/docs/copy/#emulate-passthrough-copy-during-serve

	// eleventyConfig.setServerPassthroughCopyBehavior("passthrough");
};

export const config = {
	// Control which files Eleventy will process
	// e.g.: *.md, *.njk, *.html, *.liquid
	templateFormats: [
		"md",
		"njk",
		"html",
		"liquid",
		"11ty.js",
	],

	// Pre-process *.md files with: (default: `liquid`)
	markdownTemplateEngine: "njk",

	// Pre-process *.html files with: (default: `liquid`)
	htmlTemplateEngine: "njk",

	// These are all optional:
	dir: {
		input: "content",          // default: "."
		includes: "../_includes",  // default: "_includes" (`input` relative)
		data: "../_data",          // default: "_data" (`input` relative)
		output: "_site"
	},

	// -----------------------------------------------------------------
	// Optional items:
	// -----------------------------------------------------------------

	// If your site deploys to a subdirectory, change `pathPrefix`.
	// Read more: https://www.11ty.dev/docs/config/#deploy-to-a-subdirectory-with-a-path-prefix

	// When paired with the HTML <base> plugin https://www.11ty.dev/docs/plugins/html-base/
	// it will transform any absolute URLs in your HTML to include this
	// folder name and does **not** affect where things go in the output folder.

	// pathPrefix: "/",
};