Allows plugins and themes to modify the placeholder image. This filter is not prefixed with jetpack_ to provide a smoother migration process from the WordPress Lazy Load plugin.
Parameters
- .
- ( lazy-images ) . .
- .
- ( 5.6.0 ) . .
- Default
- ( 6.5.0 ) image is now a base64 encoded transparent gif. . . .
- The
- ( string ) URL to the placeholder image . . .