assets: add event pageLoaded

assets/src/pageLoad.js

@@ -136,6 +136,11 @@ export default class PageLoad {
             history.pushState(state, '', url)
     }
 
+    dispatchPageLoaded(url) {
+        var evt = new CustomEvent("pageLoaded", {detail: url})
+        document.dispatchEvent(evt)
+    }
+
     // --- events
     pageChanged(event) {
         let submit = event.type == 'submit';
@@ -161,7 +166,7 @@ export default class PageLoad {
             else
                 options = {...options, method: target.method, body: formData}
         }
-        this.load(url, options).then(() => this.historySave(url))
+        this.load(url, options).then(() => this.dispatchPageLoaded(url)).then(() => this.historySave(url))
         event.preventDefault();
         event.stopPropagation();
     }