Demo Company

Deliver it · Loading lab

Four loading choices, one page. Change them, load the page, and compare its first paint and its request log. Every setting is in the address, so any combination can be shared.

First paint: measuring… · Our script: not yet run

Below the fold

(The gap above is on purpose: browsers start lazy images well before they reach the screen.) Twelve photos follow. With loading="lazy", the browser fetches each only as it nears the screen; scroll, and watch them join the request log.