Adds parameter to override default timeout when searching for the rootSelector element

README.md

@@ -65,6 +65,16 @@ export const parameters = {
 };
 ```
 
+You can override the default timeout value to ensure the DOM is completely loaded before searching for the wrapper selector element.
+
+```js
+export const parameters = {
+  html: {
+    delay: 500, // default: 0
+  },
+};
+```
+
 When using Web Components, the HTML will contain empty comments, i.e. `<!---->`.
 If you want to remove these, use the `removeEmptyComments` parameter:
 

addon/src/decorators/withHTML.js

@@ -15,7 +15,7 @@ export const withHTML = makeDecorator({
         html = html.replace(/<!--\s*-->/g, '');
       }
       channel.emit(EVENT_CODE_RECEIVED, { html, options: parameters });
-    }, 0);
+    }, parameters.delay || 0);
     return storyFn(context);
   },
 });