Module Development

Attachments and Caching with the Render API for Drupal 7

This page is archived

We're keeping this page up as a courtesy to folks who may need to refer to old instructions. We don't plan to update this page.

Alternate resources

Sprout Video

This chapter walks through how you can conditionally add either JavaScript or CSS to a content element as well as how to cache the content with Drupal's caching system. Additional notes: The cache will clear the first time cron.php is run AFTER whatever time you've specified as the cache expiration date in your code. Which you could easily calculate to be 30 seconds in the future and then store that timestamp in the database. However, you would also need to make sure that cron was running frequently enough to clear the cache every 30 seconds.

Additional resources

Render Arrays overview (