1 files changed, 11 insertions, 1 deletions
diff --git a/static/vevent.ts b/static/vevent.ts
index e35c469f..4b6d44c6 100644
--- a/static/vevent.ts
+++ b/static/vevent.ts
@@ -3,7 +3,8 @@ import { parseDate } from './lib'
 
 export {
     VEvent, xml_to_vcal,
-    RecurrenceRule
+    RecurrenceRule,
+    isRedrawable,
 }
 
 /* Something which can be redrawn */
@@ -11,6 +12,11 @@ interface Redrawable extends HTMLElement {
     redraw: ((data: VEvent) => void)
 }
 
+function isRedrawable(x: HTMLElement): x is Redrawable {
+    return 'redraw' in x
+}
+
+
 class VEventValue {
 
     type: ical_type
@@ -209,6 +215,10 @@ class VEvent {
         this.registered.push(htmlNode);
     }
 
+    unregister(htmlNode: Redrawable) {
+        this.registered = this.registered.filter(node => node !== htmlNode)
+    }
+
     to_jcal(): JCal {
         let out_properties: JCalProperty[] = []
         console.log(this.properties);