Read more about lazy loading content. 

'loading' in HTMLImageElement.prototype === false

Note: there are 22 images with alt text in this document.

A standard loaded static image: standard test

A standard loaded image within a link: standard test 2

The following are all lazy loaded images

lazy test

lazy test 2

lazy test 3

lazy test 4

lazy test 5

lazy test 6

lazy test 7

lazy test 8

lazy test 9

lazy test 10

lazy test 11

lazy test 12

lazy test 13

lazy test 14

lazy test 15

lazy test 16

the following are lazy loaded images within links

lazy test 17

lazy test 18

lazy test 19

lazy test 20