Gets the threshold for how many of the first content media elements to not lazy-load.

This function runs the {@see ‘wp_omit_loading_attr_threshold’} filter, which uses a default threshold value of 1.
The filter is only run once per page load, unless the `$force` parameter is used.

function wp_omit_loading_attr_threshold( $force = false ) {
	static $omit_threshold;

	// This function may be called multiple times. Run the filter only once per page load.
	if ( ! isset( $omit_threshold ) || $force ) {
		/**
		 * Filters the threshold for how many of the first content media elements to not lazy-load.
		 *
		 * For these first content media elements, the `loading` attribute will be omitted. By default, this is the case
		 * for only the very first content media element.
		 *
		 * @since 5.9.0
		 *
		 * @param int $omit_threshold The number of media elements where the `loading` attribute will not be added. Default 1.
		 */
		$omit_threshold = apply_filters( 'wp_omit_loading_attr_threshold', 1 );
	}

	return $omit_threshold;
}