doc,url: clarify domainTo* when built without ICU

Continuation of: #35099 Signed-off-by: Darshan Sen <[email protected]> PR-URL: #38789 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>
nodejs · May 31, 2021 · 0c063a1 · 0c063a1
1 parent 4e11971
commit 0c063a1
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/doc/api/url.md b/doc/api/url.md
@@ -942,6 +942,9 @@ invalid domain, the empty string is returned.
 
 It performs the inverse operation to [`url.domainToUnicode()`][].
 
+This feature is only available if the `node` executable was compiled with
+[ICU][] enabled. If not, the domain names are passed through unchanged.
+
 ```mjs
 import url from 'url';
 
@@ -979,6 +982,9 @@ domain, the empty string is returned.
 
 It performs the inverse operation to [`url.domainToASCII()`][].
 
+This feature is only available if the `node` executable was compiled with
+[ICU][] enabled. If not, the domain names are passed through unchanged.
+
 ```mjs
 import url from 'url';