From d759fde7f33da1b93ed3571ab254acefa0f0fdc9 Mon Sep 17 00:00:00 2001
From: Teddy Wing
Date: Tue, 7 Sep 2021 23:55:56 +0200
Subject: background: Describe the `wildcard_domains` function

---
 background.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'background.js')

diff --git a/background.js b/background.js
index 7a884a1..7553a30 100644
--- a/background.js
+++ b/background.js
@@ -35,7 +35,12 @@ browser.runtime.onMessage.addListener(function(message) {
 });
 
 
-// function insert_css (hostname) {
+// Build a list of wildcard domains from the given hostname.
+//
+// Example:
+//
+//     wildcard_domains('en.wikipedia.org');
+//     => [ '*', '*.org', '*.wikipedia.org', 'en.wikipedia.org' ]
 function wildcard_domains (hostname) {
 	var domain_parts = hostname.split('.');
 	var domains = [];
-- 
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