如何对Jetpack Lazyload使用apply_filter（）

I am using Jetpack Lazyload on my Website. I have an online store using WooCommerce.

The jetpack Lazyload feature works great. The only problem I am having (which is a pretty big one) is that when I select a product to view, the product page opens but the main product image is covered by the thumbnails.

If the product has multiple images, I can select a thumbnail and it sorts itself, however if there is only one image then it is stuck like that.

I found this :

apply_filters( 'lazyload_is_enabled', bool true )

but when I try to add this to functions.php, visual studio code recognises it as an error. I tried uploading anyway and it broke my site.

I have never used this function. If someone has experience using it and could help me implement it properly, that would be great.

thanks

You can just call it like this if you want to enable image lazy loading:

apply_filters( 'lazyload_is_enabled', true );

Or, if you want to disable image lazy loading for the non-Mobile UI:

function isMobileDevice() {
    return preg_match("/(android|avantgo|blackberry|bolt|boost|cricket|docomo|fone|hiptop|mini|mobi|palm|phone|pie|tablet|up\.browser|up\.link|webos|wos)/i", $_SERVER["HTTP_USER_AGENT"]);
}

if(!isMobileDevice()){
    apply_filters ( 'lazyload_is_enabled', false );
}