[Resolved] Showing thumbnails only on mobile

[Elio Martinez]

Hi,

A question about image sizes and how to optimize loading times.

In Blog > Archive is there a way to show thumbnails on mobile and medium on tablet and computers?

Thanks.

[David]

Hi there,

hmmm…. you could try using this filter:

https://docs.generatepress.com/article/adjusting-the-featured-images/#changing-the-featured-image-sizes-using-a-filter

and change the condtion from:

if ( is_post_type_archive( 'portfolio' ) ) {

to

if ( wp_is_mobile() ) {

More info on the wp_is_mobile function:

https://developer.wordpress.org/reference/functions/wp_is_mobile/

[Elio Martinez]

Hi David,

If I use that function the only thing that changes is the size, but not the file. What I want is to show the thumbnail file in mobile (lighter than medium) and the medium file in tablet and desktop.

[David]

I am not 100% sure but … if you set the sizes using that function and there is a Media Attachment available that matches it then WP may grab that file.

Haven’t tested it though.

[Author]

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