// Import the necessary libraries and plugins using ESM syntax import fs from "node:fs/promises"; import { DateTime } from "luxon"; import { eleventyImageTransformPlugin } from "@11ty/eleventy-img"; import { minify } from "html-minifier-terser"; import PurgeCss from "eleventy-plugin-purgecss"; import CleanCSS from "clean-css"; import markdownIt from "markdown-it"; import markdownItAttrs from "markdown-it-attrs"; import markdownItAnchor from "markdown-it-anchor"; import markdownItBracketedSpans from "markdown-it-bracketed-spans"; export default function (eleventyConfig) { // // Configure Eleventy to not use .gitignore files eleventyConfig.setUseGitIgnore(false); // Set the directories for input, includes, data, and output eleventyConfig.dir = { input: "src", includes: "_includes", data: "_data", output: "site", }; // Set Markdown options const mdOptions = { html: true, // Allow HTML tags in Markdown files breaks: true, // Convert line breaks to HTML
tags linkify: true, // Automatically convert URLs into links }; const markdownItAnchorOptions = { level: 2, // minimum level header -- anchors will only be applied to h2 level headers and below but not h1 permalink: true, }; // Create a Markdown library with custom plugins const markdownLib = markdownIt(mdOptions) .use(markdownItAnchor, markdownItAnchorOptions) .use(markdownItAttrs) .use(markdownItBracketedSpans) // Enable bracketed spans .disable("code"); // Set the Markdown library to use with Eleventy eleventyConfig.setLibrary("md", markdownLib); // Define the template formats that Eleventy will process eleventyConfig.setTemplateFormats([ "md", "webmanifest", "xml", "ico", "avif", "webp", "webm", "svg", "png", "jpg", "jpeg", "txt", "woff", "woff2", "css", "pdf", ]); // Register a filter to output a human-readable post date eleventyConfig.addFilter("readablePostDate", (dateObj) => { return DateTime.fromJSDate(dateObj, { zone: "Asia/Singapore", }) .setLocale("en-GB") .toLocaleString({ day: "numeric", month: "short", year: "numeric" }); }); // Register a filter to output post date in ISO format eleventyConfig.addFilter("postDate", (dateObj) => { return DateTime.fromJSDate(dateObj, { zone: "Asia/Singapore", }) .setLocale("en-GB") .toISODate(); }); // Register a filter to output post date in ISO format eleventyConfig.addFilter("postDate", (dateObj) => { return DateTime.fromJSDate(dateObj, { zone: "Asia/Hong_Kong" }) .setLocale("en-GB") .toISODate(); }); // Add an image transform plugin with custom configuration eleventyConfig.addPlugin(eleventyImageTransformPlugin, { extensions: "html", // Process only HTML files formats: ["jpg", "webp"], widths: ["auto", 400, 800, 1600], defaultAttributes: { loading: "lazy", sizes: "auto", decoding: "async", }, }); // Add a transform to minify HTML content eleventyConfig.addTransform("minifyHTML", (content, outputPath) => { // Only minify HTML files if (outputPath?.endsWith(".html")) { return minify(content, { collapseWhitespace: true, // Collapses whitespace between tags removeComments: true, // Removes HTML comments minifyCSS: true, // Minifies inline CSS minifyJS: true, // Minifies inline JavaScript removeAttributeQuotes: true, // Removes quotes around attributes when possible removeOptionalTags: true, // Removes optional HTML tags (, , ) collapseBooleanAttributes: true, // Converts boolean attributes to HTML5 style removeEmptyAttributes: true, // Removes empty attributes minifyURLs: true, // Minifies URLs in attributes html5: true, // Enables HTML5 parsing }); } return content; // Return the original content if not HTML }); // CleanCSS eleventyConfig.on("afterBuild", async () => { const inputFiles = ["src/css/reset.css", "src/css/index.css"]; for (const inputFile of inputFiles) { try { const input = await fs.readFile(inputFile, "utf8"); const output = new CleanCSS().minify(input); const outputFilePath = `site/css/${inputFile.split("/").pop()}`; // Adjust output path as necessary await fs.writeFile(outputFilePath, output.styles); console.log( `eleventy-plugin-cleancss: Successfully minified ${inputFile} to ${outputFilePath}`, ); } catch (err) { console.error( `eleventy-plugin-cleancss: Error minifying ${inputFile}: ${err}`, ); } } }); // Purge unused CSS eleventyConfig.addPlugin(PurgeCss, { config: "./purgecss.config.cjs", }); // Return effective configuration for Eleventy return { dir: { input: "src", includes: "_includes", output: "site", }, }; }