Merge branch '337350-only-dispatch-auto-tracked-render-events-once-per-page-load' into 'master'

Only dispatch auto-tracked "render" events once per page load

See merge request gitlab-org/gitlab!67275

app/assets/javascripts/tracking/constants.js

@@ -18,3 +18,9 @@ export const DEFAULT_SNOWPLOW_OPTIONS = {
     fields: { allow: [] },
   },
 };
+
+export const ACTION_ATTR_SELECTOR = '[data-track-action]';
+export const LOAD_ACTION_ATTR_SELECTOR = '[data-track-action="render"]';
+
+export const DEPRECATED_EVENT_ATTR_SELECTOR = '[data-track-event]';
+export const DEPRECATED_LOAD_EVENT_ATTR_SELECTOR = '[data-track-event="render"]';

app/assets/javascripts/tracking/tracking.js

+import { LOAD_ACTION_ATTR_SELECTOR, DEPRECATED_LOAD_EVENT_ATTR_SELECTOR } from './constants';
 import { dispatchSnowplowEvent } from './dispatch_snowplow_event';
 import getStandardContext from './get_standard_context';
 import { getEventHandlers, createEventPayload, renameKey, addExperimentContext } from './utils';
@@ -98,7 +99,7 @@ export default class Tracking {
     }
 
     const loadEvents = parent.querySelectorAll(
-      '[data-track-action="render"], [data-track-event="render"]',
+      `${LOAD_ACTION_ATTR_SELECTOR}, ${DEPRECATED_LOAD_EVENT_ATTR_SELECTOR}`,
     );
 
     loadEvents.forEach((element) => {

app/assets/javascripts/tracking/utils.js

 import { omitBy, isUndefined } from 'lodash';
 import { TRACKING_CONTEXT_SCHEMA } from '~/experimentation/constants';
 import { getExperimentData } from '~/experimentation/utils';
+import {
+  ACTION_ATTR_SELECTOR,
+  LOAD_ACTION_ATTR_SELECTOR,
+  DEPRECATED_EVENT_ATTR_SELECTOR,
+  DEPRECATED_LOAD_EVENT_ATTR_SELECTOR,
+} from './constants';
 
 export const addExperimentContext = (opts) => {
   const { experiment, ...options } = opts;
@@ -65,7 +71,9 @@ export const createEventPayload = (el, { suffix = '' } = {}) => {
 };
 
 export const eventHandler = (e, func, opts = {}) => {
-  const el = e.target.closest('[data-track-event], [data-track-action]');
+  const actionSelector = `${ACTION_ATTR_SELECTOR}:not(${LOAD_ACTION_ATTR_SELECTOR})`;
+  const deprecatedEventSelector = `${DEPRECATED_EVENT_ATTR_SELECTOR}:not(${DEPRECATED_LOAD_EVENT_ATTR_SELECTOR})`;
+  const el = e.target.closest(`${actionSelector}, ${deprecatedEventSelector}`);
 
   if (!el) {
     return;

spec/frontend/tracking_spec.js

@@ -387,11 +387,13 @@ describe('Tracking', () => {
     beforeEach(() => {
       eventSpy = jest.spyOn(Tracking, 'event');
       setHTMLFixture(`
+        <div data-track-${term}="click_link" data-track-label="all_nested_links">
           <input data-track-${term}="render" data-track-label="label1" value=1 data-track-property="_property_"/>
           <span data-track-${term}="render" data-track-label="label2" data-track-value=1>
-          Something
+            <a href="#" id="link">Something</a>
           </span>
           <input data-track-${term}="_render_bogus_" data-track-label="label3" value="_value_" data-track-property="_property_"/>
+        </div>
       `);
       Tracking.trackLoadEvents('_category_'); // only happens once
     });
@@ -417,6 +419,35 @@ describe('Tracking', () => {
         ],
       ]);
     });
+
+    describe.each`
+      event                 | actionSuffix
+      ${'click'}            | ${''}
+      ${'show.bs.dropdown'} | ${'_show'}
+      ${'hide.bs.dropdown'} | ${'_hide'}
+    `(`auto-tracking $event events on nested elements`, ({ event, actionSuffix }) => {
+      let link;
+
+      beforeEach(() => {
+        link = document.querySelector('#link');
+        eventSpy.mockClear();
+      });
+
+      it(`avoids using ancestor [data-track-${term}="render"] tracking configurations`, () => {
+        link.dispatchEvent(new Event(event, { bubbles: true }));
+
+        expect(eventSpy).not.toHaveBeenCalledWith(
+          '_category_',
+          `render${actionSuffix}`,
+          expect.any(Object),
+        );
+        expect(eventSpy).toHaveBeenCalledWith(
+          '_category_',
+          `click_link${actionSuffix}`,
+          expect.objectContaining({ label: 'all_nested_links' }),
+        );
+      });
+    });
   });
 
   describe('tracking mixin', () => {