fix(bootstrap): double hit when page tracker enabled (#146)

Author: MatteoGabriele

__tests__/bootstrap.spec.js

@@ -1,5 +1,6 @@
+import config from "@/api/config";
 import bootstrap from "@/bootstrap";
-import { getOptions } from "@/install";
+import { getRouter, getOptions } from "@/install";
 import flushPromises from "flush-promises";
 import pageTracker from "@/page-tracker";
 import optOut from "@/api/opt-out";
@@ -159,6 +160,7 @@ describe("bootstrap", () => {
   });
 
   it("should start tracking pages when enabled", () => {
+    getRouter.mockReturnValueOnce({});
     getOptions.mockReturnValueOnce({
       globalObjectName: "gtag",
       pageTrackerEnabled: true,
@@ -170,11 +172,12 @@ describe("bootstrap", () => {
     bootstrap();
 
     expect(pageTracker).toHaveBeenCalled();
+    expect(config).not.toHaveBeenCalled();
 
     flushPromises();
   });
 
-  it("should not start tracking pages when enabled", () => {
+  it("should not start tracking pages when disabled", () => {
     getOptions.mockReturnValueOnce({
       globalObjectName: "gtag",
       pageTrackerEnabled: false,
@@ -190,6 +193,21 @@ describe("bootstrap", () => {
     flushPromises();
   });
 
+  it("should fire a config when pageTracker is not enabled", () => {
+    getOptions.mockReturnValueOnce({
+      globalObjectName: "gtag",
+      config: {
+        id: 1
+      }
+    });
+
+    bootstrap();
+
+    expect(config).toHaveBeenCalled();
+
+    flushPromises();
+  });
+
   it("should return an error when script loading fails", done => {
     util.warn = jest.fn();
     util.loadScript = jest.fn(() => Promise.reject(new Error()));

src/bootstrap.js

@@ -1,6 +1,6 @@
 import { warn, isFn, loadScript } from "./util";
 import config from "./api/config";
-import { getOptions } from "../src/install";
+import { getRouter, getOptions } from "../src/install";
 import optOut from "./api/opt-out";
 import pageTracker from "./page-tracker";
 
@@ -18,6 +18,9 @@ export default function() {
     disableScriptLoad
   } = getOptions();
 
+  const Router = getRouter();
+  const isPageTrackerEnabled = Boolean(pageTrackerEnabled && Router);
+
   if (!enabled) {
     optOut();
   }
@@ -31,10 +34,10 @@ export default function() {
 
   window[globalObjectName]("js", new Date());
 
-  config();
-
-  if (pageTrackerEnabled) {
+  if (isPageTrackerEnabled) {
     pageTracker();
+  } else {
+    config();
   }
 
   if (disableScriptLoad) {