The Question Mark - blog by Mark Volkmann

To minify the HTML produced for each page, install html-minifier by entering the following:

npm install -D html-minifier

Then add the following in .eleventy.js:

module.exports = eleventyConfig => {
  eleventyConfig.addTransform('htmlmin', (content, outputPath) => {
    if (!outputPath || !outputPath.endsWith('.html')) return content;
    return htmlmin.minify(content, {
      useShortDoctype: true,
      removeComments: true,
      collapseWhitespace: true
    });
  });
};