import { window } from 'global';
import { addons } from '@storybook/addons';
import { STORY_CHANGED, STORY_ERRORED, STORY_MISSING } from '@storybook/core-events';

import ReactGA from 'react-ga';

addons.register('storybook/google-analytics', api => {
  ReactGA.initialize(window.STORYBOOK_GA_ID);

  api.on(STORY_CHANGED, () => {
    const { path } = api.getUrlState();
    ReactGA.pageview(path);
  });
  api.on(STORY_ERRORED, ({ description }: { description: string }) => {
    ReactGA.exception({
      description,
      fatal: true,
    });
  });
  api.on(STORY_MISSING, (id: string) => {
    ReactGA.exception({
      description: `attempted to render ${id}, but it is missing`,
      fatal: false,
    });
  });
});

import { window } from 'global';
import { addons } from '@storybook/addons';
import { STORY_CHANGED, STORY_ERRORED, STORY_MISSING } from '@storybook/core-events';

import ReactGA from 'react-ga';

addons.register('storybook/google-analytics', api => {
  ReactGA.initialize(window.STORYBOOK_GA_ID);

  api.on(STORY_CHANGED, () => {
    const { url } = api.getUrlState();
    ReactGA.pageview(url);
  });
  api.on(STORY_ERRORED, ({ description }: { description: string }) => {
    ReactGA.exception({
      description,
      fatal: true,
    });
  });
  api.on(STORY_MISSING, (id: string) => {
    ReactGA.exception({
      description: `attempted to render ${id}, but it is missing`,
      fatal: false,
    });
  });
});

--- 
+++ 
@@ -8,8 +8,8 @@
   ReactGA.initialize(window.STORYBOOK_GA_ID);
 
   api.on(STORY_CHANGED, () => {
-    const { url } = api.getUrlState();
-    ReactGA.pageview(url);
+    const { path } = api.getUrlState();
+    ReactGA.pageview(path);
   });
   api.on(STORY_ERRORED, ({ description }: { description: string }) => {
     ReactGA.exception({
Fix 'path is required in .pageview()' in GA addon

See https://github.com/storybookjs/storybook/issues/6012