From 6eeccb530baf049e80cc429558c7fa61ebd0f165 Mon Sep 17 00:00:00 2001
From: Andrew Hankinson <andrew.hankinson@gmail.com>
Date: Tue, 14 Jun 2022 08:57:00 +0200
Subject: [PATCH] Fixed: ID field parsing on IIIF tile sources

The IIIF specification allows for the ID field to be either with or without
an "@" prefix for IIIFv3. (See: https://iiif.io/api/image/3.0/) Currently OSD
will fail to parse an image block that uses the non-prefixed form.

This PR changes the IIIF tile source parsing to allow for both forms of the
`id` key.
---
 src/iiiftilesource.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/iiiftilesource.js b/src/iiiftilesource.js
index 921ccd12..5b47b266 100644
--- a/src/iiiftilesource.js
+++ b/src/iiiftilesource.js
@@ -51,7 +51,7 @@ $.IIIFTileSource = function( options ){
 
     $.extend( true, this, options );
 
-    if ( !( this.height && this.width && this['@id'] ) ) {
+    if ( !( this.height && this.width && (this['@id'] || this['id']) ) ) {
         throw new Error( 'IIIF required parameters not provided.' );
     }