Simplify HtmlReporterV2 initialization and boot1.js

src/boot/boot1.js

@@ -17,19 +17,6 @@
   const env = jasmine.getEnv();
   const urls = new jasmine.HtmlReporterV2Urls();
 
-  /**
-   * ## Reporters
-   * The `HtmlReporter` builds all of the HTML UI for the runner page. This reporter paints the dots, stars, and x's for specs, as well as all spec names and all failures (if any).
-   */
-  const htmlReporter = new jasmine.HtmlReporterV2({
-    env,
-    urls,
-    getContainer() {
-      return document.body;
-    }
-  });
-
-  env.addReporter(htmlReporter);
   /**
    * Configures Jasmine based on the current set of query parameters. This
    * supports all parameters set by the HTML reporter as well as
@@ -38,18 +25,11 @@
    */
   env.configure(urls.configFromCurrentUrl());
 
-  /**
-   * ## Execution
-   *
-   * Replace the browser window's `onload`, ensure it's called, and then run all of the loaded specs. This includes initializing the `HtmlReporter` instance and then executing the loaded Jasmine environment. All of this will happen after all of the specs are loaded.
-   */
-  const currentWindowOnload = window.onload;
-
-  window.onload = function() {
-    if (currentWindowOnload) {
-      currentWindowOnload();
-    }
-    htmlReporter.initialize();
+  window.addEventListener('load', function() {
+    // The HTML reporter needs to be set up here so it can access the DOM. Other
+    // reporters can be added at any time before env.execute() is called.
+    const htmlReporter = new jasmine.HtmlReporterV2({ env, urls });
+    env.addReporter(htmlReporter);
     env.execute();
-  };
+  });
 })();