From b3a552a2e7eaf19172d5a788f07186ece47596fe Mon Sep 17 00:00:00 2001
From: Glen Davies <glendaviesnz@users.noreply.github.com>
Date: Wed, 16 Oct 2019 20:54:48 +1300
Subject: [PATCH] Prevent prependHttp from failing if url is not defined
 (#17928)

* Check that url is defined before passing into prependHttp

* Shift check from component to url lib
---
 packages/url/src/index.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/url/src/index.js b/packages/url/src/index.js
index b4fa34efac51a..2b549d6ba1dc4 100644
--- a/packages/url/src/index.js
+++ b/packages/url/src/index.js
@@ -360,6 +360,10 @@ export function removeQueryArgs( url, ...args ) {
  * @return {string} The updated URL.
  */
 export function prependHTTP( url ) {
+	if ( ! url ) {
+		return url;
+	}
+
 	url = url.trim();
 	if ( ! USABLE_HREF_REGEXP.test( url ) && ! EMAIL_REGEXP.test( url ) ) {
 		return 'http://' + url;