Event tracking analytics

There are many custom events we created to give us added insight into user behavior. They are listed and defined below. These were added at different times and the dates at which they started collecting data (or were turned off) can be deduced from Google Analytics with the date dimension. Some events are implemented globally and some are implemented at a page-level, we’ll identify which are such below.

Event hooks conventions

If a specific query selector is needed to attach an event create a new classname with a js- prefix. Using that only for javascript event attachment makes it obvious to a developer only concerned with layout that they are affecting javascript when they are modifying HTML.

Accordion clicks - global

These events are attached to any of our accordion elements, which can be on any page.

“click”“accordion”accordion header stringfor current reporting
“accordion”“click”accordion header stringfor historical reporting

Is this page useful - global

We have a widget in the footer that asks users Is this page useful? We send events to Google Analytics when they click Yes or No. The comments are collected separately in a database outside of Google Analytics. The Yes/No button clicks event data is:

“rating”“helpful”“yes” or “no”

We record when a user clicks on a link that send them to a URL that’s not on our site (for example, https://www.cdc.gov/coronavirus/2019-ncov/vaccines/safety.html).


We record when a user clicks on a PDF link.


Search - global

We record the search terms people use to see if we need to create more quick answer content. The got_quick_answers and no_quick_answers actions are used to show when a search query finds one or more quick answers.

“search”“got_quick_answers”search terms
“search”“no_quick_answers”search terms

Surveys - global

We track several events related to inviting users to take surveys like the survey prompt display, selecting on the button to take the survey, or dismissing the prompt.


Home - page-level

When we redesigned and relaunched the homepage we began tracking several elements to understand what was prime real estate and what information users wanted.

“click”“homepage-tracking covid”“url”
“click”“homepage-hero text”“url”
“click”“homepage-alerts section”“url”
“click”“homepage-want to know”“url”
“click”“homepage-latest news”“url or ‘view more’”

Safer Economy (Blueprint) - page-level

When we launched the Blueprint for a Safer Economy page we wanted to track how users interacted with the what’s open search box. If the user selected county is (not set) that means they did not select a county and are looking at acitivity statuses statewide. Similarly, if the user-selected activity is (not set) that means they are looking at all activities rather than a specific one.

“activity-status”“{user-selected-county}” or “(not set)”“{user-selected-activity}” or “(not set)”

Equity - page-level

When we launched the equity page we wanted to track how users interacted with the page and chart data.

Created and maintained by Office of Digital Innovation