Minify pre-rendered HMTL before writing to file

index.js

@@ -4,6 +4,7 @@ const mkdirp = require('mkdirp');
 const cosmiconfig = require('cosmiconfig');
 const Prerenderer = require('@prerenderer/prerenderer');
 const Puppeteer = require('@prerenderer/renderer-puppeteer');
+const htmlnano = require('htmlnano');
 
 module.exports = bundler => {
   bundler.on('buildEnd', async () => {
@@ -28,17 +29,18 @@ module.exports = bundler => {
       const start = Date.now();
       const renderedRoutes = await prerenderer.renderRoutes(routes);
       const end = Date.now();
-      renderedRoutes.forEach(route => {
+      await Promise.all(renderedRoutes.map(async route => {
         try {
           const outputDir = path.join(outDir, route.route);
           const file = path.normalize(`${outputDir}/index.html`);
           mkdirp.sync(outputDir);
-          fs.writeFileSync(file, route.html.trim());
+          const {html} = await htmlnano.process(route.html.trim());
+          fs.writeFileSync(file, html);
           const end = Date.now();
         } catch (err) {
           console.error(err);
         }
-      });
+      }));
       console.log(`Finished rendering in ${end - start}ms.`);
       prerenderer.destroy();
     } catch (err) {

package.json

@@ -20,6 +20,7 @@
     "@prerenderer/prerenderer": "^0.7.2",
     "@prerenderer/renderer-puppeteer": "^0.2.0",
     "cosmiconfig": "^5.0.6",
+    "htmlnano": "^0.2.3",
     "mkdirp": "^0.5.1"
   },
   "devDependencies": {