From 9f0f0cebc0c035cced0b219877b0c97019db6f53 Mon Sep 17 00:00:00 2001
From: G Roques <groques360@gmail.com>
Date: Sun, 24 Mar 2019 09:06:22 -0500
Subject: [PATCH] Fix embedding Twitter URLs with a trailing slash (Closes
 #12664)

---
 packages/block-library/src/embed/edit.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/block-library/src/embed/edit.js b/packages/block-library/src/embed/edit.js
index 0e251a8f0aafd..a78cac02c4c4a 100644
--- a/packages/block-library/src/embed/edit.js
+++ b/packages/block-library/src/embed/edit.js
@@ -62,12 +62,19 @@ export function getEmbedEditComponent( title, icon, responsive = true ) {
 			if ( switchedPreview || switchedURL ) {
 				if ( this.props.cannotEmbed ) {
 					// Can't embed this URL, and we've just received or switched the preview.
+					this.resubmitWithoutTrailingSlash();
 					return;
 				}
 				this.handleIncomingPreview();
 			}
 		}
 
+		resubmitWithoutTrailingSlash() {
+			this.setState( ( prevState ) => ( {
+				url: prevState.url.replace( /\/$/, '' ),
+			} ), this.setUrl );
+		}
+
 		setUrl( event ) {
 			if ( event ) {
 				event.preventDefault();