Revoke blob inside setTimeout.

Author: lindapaiste

client/modules/Preview/EmbedFrame.jsx

@@ -302,13 +302,14 @@ function EmbedFrame({ files, isPlaying, basePath, gridOutput, textOutput }) {
         content: htmlDoc
       };
       const htmlUrl = createBlobUrl(generatedHtmlFile);
-      if (srcRef.current) {
-        blobUtil.revokeObjectURL(srcRef.current);
-      }
+      const toRevoke = srcRef.current;
       srcRef.current = htmlUrl;
       // BRO FOR SOME REASON YOU HAVE TO DO THIS TO GET IT TO WORK ON SAFARI
       setTimeout(() => {
         doc.src = htmlUrl;
+        if (toRevoke) {
+          blobUtil.revokeObjectURL(toRevoke);
+        }
       }, 0);
     } else {
       doc.src = '';