From 08f7835f5dd496b90760fa3ff5c95365134d7d90 Mon Sep 17 00:00:00 2001
From: xdavidwu <xdavidwuph@gmail.com>
Date: Tue, 31 Jan 2023 21:35:43 +0800
Subject: [PATCH] sanitizer: allow id in <sup>

One of blogs I read uses anchor on <sup> to link a footnote back to its
reference.
---
 reader/sanitizer/sanitizer.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reader/sanitizer/sanitizer.go b/reader/sanitizer/sanitizer.go
index b9b4510c..29b5d3fa 100644
--- a/reader/sanitizer/sanitizer.go
+++ b/reader/sanitizer/sanitizer.go
@@ -414,7 +414,7 @@ func getTagAllowList() map[string][]string {
 	whitelist["wbr"] = []string{}
 	whitelist["dfn"] = []string{}
 	whitelist["sub"] = []string{}
-	whitelist["sup"] = []string{}
+	whitelist["sup"] = []string{"id"}
 	whitelist["var"] = []string{}
 	whitelist["samp"] = []string{}
 	whitelist["s"] = []string{}