Basic setup

.eleventy.js

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+const pluginLazyImages = require('eleventy-plugin-lazyimages');
+const pluginRssFeed = require('@11ty/eleventy-plugin-rss');
+
+const filterNbsp = require('eleventy-nbsp-filter');
+
+const filters = require('./src/utils/filters.js');
+const shortcodes = require('./src/utils/shortcodes.js');
+const collections = require('./src/utils/collections.js');
+
+module.exports = function (config) {
+  // Plugins
+  config.addPlugin(pluginRssFeed);
+
+  if (process.env.ELEVENTY_ENV == 'production') {
+    config.addPlugin(pluginLazyImages);
+  }
+
+  // Markdown It
+  let markdownIt = require('markdown-it');
+  let markdownItFootnotes = require('markdown-it-footnote');
+  let markdownItGitHubHeadings = require('markdown-it-github-headings');
+  let markdownItSub = require('markdown-it-sub');
+  let markdownItSup = require('markdown-it-sup');
+  let markdownItExternalAnchor = require('markdown-it-external-anchor');
+  let options = {
+    html: true,
+  };
+
+  let markdownLib = markdownIt(options)
+    .use(markdownItFootnotes)
+    .use(markdownItGitHubHeadings)
+    .use(markdownItExternalAnchor, {
+      domain: 'hamburg.stefanimhoff.de',
+      class: 'external',
+    })
+    .use(markdownItSub)
+    .use(markdownItSup);
+
+  config.setLibrary('md', markdownLib);
+
+  // Compress and combine JS files
+  config.addFilter('jsmin', require('./src/utils/minify-js.js'));
+
+  // Minify the HTML in production
+  if (process.env.ELEVENTY_ENV == 'production') {
+    config.addTransform('htmlmin', require('./src/utils/minify-html.js'));
+  }
+
+  // Shortcodes
+
+  // Filters
+  Object.keys(filters).forEach((filterName) => {
+    config.addFilter(filterName, filters[filterName]);
+  });
+  config.addFilter('nbsp', filterNbsp(2, 15));
+
+  // Watch for changes and reload
+  config.addWatchTarget('src/assets');
+
+  // Copy static files to dist
+  config.addPassthroughCopy({ 'src/static/**/*.{xml,html,ico}': '.' });
+  config.addPassthroughCopy({ 'src/static/.well-known/*': '.well-known' });
+  config.addPassthroughCopy({ 'src/downloads': 'downloads' });
+  config.addPassthroughCopy({ 'src/assets/fonts': 'assets/fonts' });
+  config.addPassthroughCopy({ 'src/assets/images': 'assets/images' });
+
+  // Deep-Merge
+  config.setDataDeepMerge(true);
+
+  // Custom Collections
+  Object.keys(collections).forEach((collectionName) => {
+    config.addCollection(collectionName, collections[collectionName]);
+  });
+
+  // Set input and output folders
+  return {
+    dir: {
+      input: 'src',
+      data: 'data',
+      includes: 'includes',
+      layouts: 'layouts',
+      output: 'dist',
+    },
+    templateFormats: ['njk', 'md', '11ty.js', 'jpg', 'png', 'svg'],
+    htmlTemplateEngine: 'njk',
+    dataTemplateEngine: 'njk',
+    markdownTemplateEngine: 'njk',
+    passthroughFileCopy: true,
+  };
+};