From 00b7bc60ac79fe64c66268a164e899a9de751d55 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Sat, 1 Jan 2022 22:15:12 +0100
Subject: [PATCH] Use Buffer and data uri when Blob is not available

---
 src/ol/source/Raster.js     | 9 ++++++---
 tasks/serialize-workers.cjs | 6 +++---
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/ol/source/Raster.js b/src/ol/source/Raster.js
index 0ee8129504..dfe0e1df75 100644
--- a/src/ol/source/Raster.js
+++ b/src/ol/source/Raster.js
@@ -151,9 +151,12 @@ function createWorker(config, onMessage) {
     '});',
   ]);
 
-  const blob = new Blob(lines, {type: 'text/javascript'});
-  const source = URL.createObjectURL(blob);
-  const worker = new Worker(source);
+  const worker = new Worker(
+    typeof Blob === 'undefined'
+      ? 'data:text/javascript;base64,' +
+        Buffer.from(lines.join('\n'), 'binary').toString('base64')
+      : URL.createObjectURL(new Blob(lines, {type: 'text/javascript'}))
+  );
   worker.addEventListener('message', onMessage);
   return worker;
 }
diff --git a/tasks/serialize-workers.cjs b/tasks/serialize-workers.cjs
index 4e47d2aaa1..757ea8a788 100644
--- a/tasks/serialize-workers.cjs
+++ b/tasks/serialize-workers.cjs
@@ -45,9 +45,9 @@ async function build(input, {minify = true} = {}) {
       return `
         export function create() {
           const source = ${JSON.stringify(code)};
-          const blob = new Blob([source], {type: 'application/javascript'});
-          const url = URL.createObjectURL(blob);
-          return new Worker(url);
+          return new Worker(typeof Blob === 'undefined'
+            ? 'data:application/javascript;base64,' + Buffer.from(source, 'binary').toString('base64')
+            : URL.createObjectURL(new Blob([source], {type: 'application/javascript'})));
         }
       `;
     },