From 9250f4705837ccc2f695ba814439367237274c7e Mon Sep 17 00:00:00 2001
From: John Factotum <50942278+johnfactotum@users.noreply.github.com>
Date: Fri, 21 Oct 2022 10:20:23 +0000
Subject: [PATCH] EPUB: set content type for cover blob

Although the type can often be auto-detected, it's better to set it
explicitly, especially for SVGs.
---
 epub.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/epub.js b/epub.js
index 65763f3..1d0867d 100644
--- a/epub.js
+++ b/epub.js
@@ -689,9 +689,11 @@ export class EPUB {
                 else this.metadata[key] = [value]
             }))
 
-        this.getCover = () => {
-            const href = this.resources?.cover?.href
-            return href ? this.loadBlob(href) : null
+        this.getCover = async () => {
+            const cover = this.resources?.cover
+            return cover?.href
+                ? new Blob([await this.loadBlob(cover.href)], { type: cover.mediaType })
+                : null
         }
         return this
     }