additional event to detect new styles

banguero · banguero · commit bf6d79aad8bc · 2019-09-18T09:28:17.000-07:00
diff --git a/libraries/load-themed-styles/src/index.ts b/libraries/load-themed-styles/src/index.ts
@@ -62,6 +62,10 @@ interface IStyleRecord {
   themableStyle: ThemableArray;
 }
 
+interface ICustomEvent<T> extends Event {
+  args?: T;
+}
+
 /**
  * object returned from resolveThemableArray function
  */
@@ -398,6 +402,13 @@ function registerStyles(styleArray: ThemableArray): void {
   _themeState.perf.count++;
   head.appendChild(styleElement);
 
+  var ev: ICustomEvent<{ newStyle: HTMLStyleElement}> = document.createEvent('HTMLEvents');
+  ev.initEvent("load-themed-styles-added", true /* bubbleEvent */);
+  ev.args = {
+    newStyle: styleElement
+  };
+  document.dispatchEvent(ev)
+
   const record: IStyleRecord = {
     styleElement: styleElement,
     themableStyle: styleArray
