добавил манифест

plugins/manifest-icons/index.js

@@ -0,0 +1,36 @@
+const sharp = require('sharp')
+const fs = require('fs').promises
+const getDirName = require('path').dirname
+
+async function writeFile (path, contents, cb) {
+  await fs.mkdir(getDirName(path), { recursive: true })
+  fs.writeFile(path, contents, cb)
+}
+
+function generatePngFavicon ({ density, width, height }, sourcePath, dimension) {
+  return sharp(sourcePath, {
+    density: (dimension / Math.max(width, height)) * density
+  })
+    .resize(dimension, dimension)
+    .png()
+    .toBuffer()
+}
+
+module.exports = (eleventyConfig) => {
+  eleventyConfig.addAsyncShortcode('manifest_icons', async function (faviconFile, ...dimensions) {
+    const metadata = await sharp(faviconFile).metadata()
+
+    const res = await Promise.all(dimensions.map(async dimension => {
+      const favicon = await generatePngFavicon(metadata, faviconFile, dimension)
+      writeFile(`dist/icons/${dimension}/favicon.png`, favicon)
+
+      return {
+        src: `/icons/${dimension}/favicon.png`,
+        sizes: `${dimension}x${dimension}`,
+        type: 'image/png'
+      }
+    }))
+
+    return JSON.stringify(res)
+  })
+}