wp-includes/deprecated.php:4703Gets the default value to use for a loading attribute on an element.
$contextstringstring|boolfunction wp_get_loading_attr_default( $context ) { _deprecated_function( __FUNCTION__, '6.3.0', 'wp_get_loading_optimization_attributes()' ); global $wp_query; // Skip lazy-loading for the overall block template, as it is handled more granularly. if ( 'template' === $context ) { return false; } /* * Do not lazy-load images in the header block template part, as they are likely above the fold. * For classic themes, this is handled in the condition below using the 'get_header' action. */ $header_area = WP_TEMPLATE_PART_AREA_HEADER; if ( "template_part_{$header_area}" === $context ) { return false; } // Special handling for programmatically created image tags. if ( 'the_post_thumbnail' === $context || 'wp_get_attachment_image' === $context ) { /* * Skip programmatically created images within post content as they need to be handled together with the other * images within the post content. * Without this clause, they would already be counted below which skews the number and can result in the first * post content image being lazy-loaded only because there are images elsewhere in the post content. */ if ( doing_filter( 'the_content' ) ) { return false; } // Conditionally skip lazy-loading on images before the loop. if ( // Only apply for main query but before the loop. $wp_query->before_loop && $wp_query->is_main_query() /* * Any image before the loop, but after the header has started should not be lazy-loaded, * except when the footer has already started which can happen when the current template * does not include any loop. */ && did_action( 'get_header' ) && ! did_action( 'get_footer' ) ) { return false; } } /* * The first elements in 'the_content' or 'the_post_thumbnail' should not be lazy-loaded, * as they are likely above the fold. */ if ( 'the_content' === $context || 'the_post_thumbnail' === $context ) { // Only elements within the main query loop have special handling. if ( is_admin() || ! in_the_loop() || ! is_main_query() ) { return 'lazy'; } // Increase the counter since this is a main query content element. $content_media_count = wp_increase_content_media_count(); // If the count so far is below the threshold, return `false` so that the `loading` attribute is omitted. if ( $content_media_count <= wp_omit_loading_attr_threshold() ) { return false; } // For elements after the threshold, lazy-load them as usual. return 'lazy'; } // Lazy-load by default for any unknown context. return 'lazy';}Introduced in 5.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.