The Check URLs loaded by the page is an error condition that checks if specific page elements are loaded on your website. These page elements are the URLs displayed in your Waterfall chart , including images, files, and other website resources.
This error condition now allows you to set extra criteria for checking each page element’s metrics. By clicking the new button, you can now specify the page element’s response size in bytes (B), total time in milliseconds (ms), and status code:
If you want to get errors when your image loads longer than 2 seconds or if a file results in a status code higher than 400, you can add specific criteria for each.
The Check URLs loaded by the page error condition are available for Browser or Full-Page checks and Transaction monitors. Note that for transaction monitors, you need to select the Waterfall option in a step to set the additional conditions.