ES Module Shims 1.3.3

Author: dhh

app/assets/javascripts/es-module-shims.js

@@ -1,4 +1,4 @@
-/* ES Module Shims 1.3.2 */
+/* ES Module Shims 1.3.3 */
 (function () {
 
   const edge = navigator.userAgent.match(/Edge\/\d\d\.\d+$/);
@@ -298,8 +298,7 @@
         const iframe = document.createElement('iframe');
         iframe.style.display = 'none';
         document.head.appendChild(iframe);
-        // we use document.write here because eg Weixin built-in browser doesn't support setting srcdoc
-        iframe.contentWindow.document.write(`<script type=importmap nonce="${nonce}">{"imports":{"x":"data:text/javascript,"}}<${''}/script><script nonce="${nonce}">import('x').then(()=>1,()=>0).then(v=>parent._$s(v))<${''}/script>`);
+        iframe.src = createBlob(`<script type=importmap nonce="${nonce}">{"imports":{"x":"data:text/javascript,"}}<${''}/script><script nonce="${nonce}">import('x').then(()=>1,()=>0).then(v=>parent._$s(v))<${''}/script>`, 'text/html');
       })
     ]);
   });