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data-pagespeed-no-defer is a custom attribute by Google for their PageSpeed module. Some services might still honor it when trying to optimize scripts loading on your website.
Deferring certain scripts used by Advanced Ads could lead to a delay in the ads visibility and therefore decrease your ad revenue.
The following code snippet is just an example on how to exclude the main script in Advanced Ads and Advanced Ads Pro from deferring. The service you are using might have an interface to better exclude scripts.
Depending on how they order scripts, it might be needed to add data-pagespeed-no-defer to other scripts, too, like jQuery.
/**
* Filters the HTML script tag of an enqueued script to add `data-pagespeed-no-defer` attribute.
*
* @param string $html The `<script>` tag for the enqueued script.
* @param string $handle The script's registered handle.
*
* @return string
*/
add_filter( 'script_loader_tag', function( $html, $handle ) {
if ( ! in_array( $handle, array( 'advanced-ads-advanced-js', 'advanced-ads-pro/cache_busting' ), true ) ) {
return $html;
}
return str_replace( 'src=', 'data-pagespeed-no-defer src=', $html );
}, 10, 2 );Code language: PHP (php)