diff --git a/js/igv.d.ts b/js/igv.d.ts
index cfc5412fc..f527b25c2 100644
--- a/js/igv.d.ts
+++ b/js/igv.d.ts
@@ -582,6 +582,15 @@ interface ReferenceFrag {
 }
 
 interface CreateOptExtras {
+    /**
+     * 
+     * An igv.js instance can be initialized on page load with query parameters.
+     * 
+     * @type {boolean=}
+     * 
+     */
+    supportQueryParameters?: boolean;
+
     /**
      * 
      * Initial genomic location(s). Either a string or an array of strings. If an array a viewport is created for each location.
@@ -597,6 +606,15 @@ interface CreateOptExtras {
      */
     nucleotideColors?: Partial<Record<Nucleotide, string>>;
 
+    /**
+     * 
+     * A Region of Interest (ROI) is a specified genomic extent that can be configured to highlight a region
+     * 
+     * @type {DefineROI[]}
+     * 
+     */
+    roi: DefineROI[];
+
     /**
      * 
      * Array of configuration objects defining tracks initially displayed when app launches.
@@ -639,12 +657,18 @@ declare class ROISet {
     isvisible: boolean;
 }
 
-interface DefineROI {
-    url: string;
+type DefineROI = {
     name: string;
-    format: string;
     color: string;
-}
+} & ({
+    url: string;
+    indexed?: boolean;
+    format?: string;
+} | {
+    chr: string;
+    start: number;
+    end: number;
+});
 
 
 declare class _Browser {