Add to Calendar Button is a web component that adds events to Google, Apple, Outlook and other calendars.
About 2,727 websites in the PageSourceSearch index contain the code that reveals it; the 50 highest-ranked are listed below.
How is Add to Calendar Button detected?
The button is written in the page as an add-to-calendar-button custom element. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
A literal is matched byte for byte, case-sensitively. Combine it with another keyword, a domain, a kind or a date filter on the search page to narrow the list. About Add to Calendar Button
Top 50 websites using Add to Calendar Button
Ranked by the domain's position in the crawl's ranked list (Common Crawl harmonic centrality), highest first. view source opens the stored page or script with the match highlighted. Computed 2026-09-30 20:21:47 UTC.
How does PageSourceSearch know a website uses Add to Calendar Button?
By the source itself: The button is written in the page as an add-to-calendar-button custom element. PageSourceSearch stores the raw HTML and first-party JavaScript of each crawled site and matches the keyword byte for byte, so every listed site's stored source contains it.
Is this a complete list of websites using Add to Calendar Button?
No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 2,727 websites that do; the count is the index's estimate at the time the list was computed. Run the keyword as a search to page through all of them, or add a kind or date filter.
How do I find websites that use Add to Calendar Button together with another technology?
Search for both keywords at once: several terms separated by spaces must all be found on the same site, or with the Same page toggle in the same page. For example <add-to-calendar-button with wp-content/plugins/ lists the WordPress sites that use Add to Calendar Button.