Speculative Loading


This plugin adds support for the Speculation Rules API, which allows defining rules by which certain URLs are dynamically prefetched or prerendered based on user interaction.

See the Speculation Rules WICG specification draft.

By default, the plugin is configured to prerender WordPress frontend URLs when the user hovers over a relevant link. This can be customized via the “Speculative Loading” section under Settings > Reading.

A filter can be used to exclude certain URL paths from being eligible for prefetching and prerendering (see FAQ section). Alternatively, you can add the ‘no-prerender’ CSS class to any link (<a> tag) that should not be prerendered.

Browser support

The Speculation Rules API is a new web API, and the specific syntax used by the plugin currently requires using Chrome 121+.

Other browsers will not see any adverse effects, however the feature will not work for those clients.

This plugin was formerly known as Speculation Rules.


Installation from within WordPress

  1. Visit Plugins > Add New.
  2. Search for Speculative Loading.
  3. Install and activate the Speculative Loading plugin.

Manual installation

  1. Upload the entire speculation-rules folder to the /wp-content/plugins/ directory.
  2. Visit Plugins.
  3. Activate the Speculative Loading plugin.

Συχνές Ερωτήσεις

How can I prevent certain URLs from being prefetched and prerendered?

Not every URL can be reasonably prerendered. Prerendering static content is typically reliable, however prerendering interactive content, such as a logout URL, can lead to issues. For this reason, certain WordPress core URLs such as /wp-login.php and /wp-admin/* are excluded from prefetching and prerendering. You can exclude additional URL patterns by using the plsr_speculation_rules_href_exclude_paths filter.

This example would ensure that URLs like https://example.com/cart/ or https://example.com/cart/foo would be excluded from prefetching and prerendering.


    function ( array $exclude_paths ): array {
        $exclude_paths[] = '/cart/*';
        return $exclude_paths;

Keep in mind that sometimes it may be useful to exclude a URL from prerendering while still allowing it to be prefetched. For example, a page with client-side JavaScript to update user state should probably not be prerendered, but it would be reasonable to prefetch.

For this purpose, the plsr_speculation_rules_href_exclude_paths filter receives the current mode (either “prefetch” or “prerender”) to provide conditional exclusions.

The following example would ensure that URLs like https://example.com/products/... cannot be prerendered, while still allowing them to be prefetched.


    function ( array $exclude_paths, string $mode ): array {
        if ( 'prerender' === $mode ) {
            $exclude_paths[] = '/products/*';
        return $exclude_paths;

Where can I submit my plugin feedback?

Feedback is encouraged and much appreciated, especially since this plugin may contain future WordPress core features. If you have suggestions or requests for new features, you can submit them as an issue in the WordPress Performance Team’s GitHub repository. If you need help with troubleshooting or have a question about the plugin, please create a new topic on our support forum.

Where can I report security bugs?

The Performance team and WordPress community take security bugs seriously. We appreciate your efforts to responsibly disclose your findings, and will make every effort to acknowledge your contributions.

To report a security issue, please visit the WordPress HackerOne program.

How can I contribute to the plugin?

Contributions are always welcome! Learn more about how to get involved in the Core Performance Team Handbook.


15 Απριλίου 2024
Testing figures do not change much, but real life experience greatly improved!
14 Απριλίου 2024
This is the biggest innovations in web performance since lazy loading.
13 Απριλίου 2024 1 απάντηση
It certainly works - I have one site with significant full width banner images and those pages pop open immediately, especially if I have just hesitated before clicking. Trying it on just one site for the moment that has no interactive content. I will be waiting to see more feedback from other users on "Prerendering will lead to faster load times than prefetching. However, in case of interactive content, prefetching may be a safer choice." Hopefully future updates will allow people to search & select pages to be excluded within plugin settings page rather than using filters. While carefully explained in the FAQ section I see many people avoiding using filters or even adding ‘no-prerender’ CSS class to links. That may lead some to have bad experiences. This is especially relevant where WordPress, in recent times, is trying to gain users who have no wish to touch any code no matter how simple. Maybe some Woocommerce pages be pre-excluded In years past pre-loading pages was kind of unethical for bandwidth usage for mobile devices, I appreciate this works on displayed intent of hovering over links. Does the slightest hover trigger the action? ____________________________________ Edit: One example where prerender (and Speculation Mode set to prefetch) caused an issue - I have banners interchanging with smaller cropped versions for mobile devices, this is achieved with css. With prerender or prefetch set both images were displaying. Interestingly "Empty cache and hard reload" of that open page made no difference. Both banner images remained on display. So "interactive content" also includes some CSS and I am assuming js. This could get fiddly to implement. Does it work? Yes Test thoroughly after implementing.
12 Απριλίου 2024
Thank you! My website has woocommerce and interactive blocks, and with this plugin it seems faster.
11 Απριλίου 2024
Works well!
Ανάγνωση όλων των 6 κριτικών

Συνεισφέροντες & Προγραμματιστές

“Speculative Loading” είναι λογισμικό ανοιχτού κώδικα. Οι παρακάτω έχουν συνεισφέρει στη δημιουργία του.


Το “Speculative Loading” έχει μεταφραστεί σε 3 γλώσσες. Ευχαριστούμε τους μεταφραστές για τις συνεισφορές τους.

Μεταφράστε το “Speculative Loading” στην γλώσσα σας.

Ενδιαφέρεστε για την ανάπτυξη;

Περιηγηθείτε στον κώδικα, ανατρέξτε στο αποθετήριο SVN ή εγγραφείτε στο αρχείο καταγραφής αλλαγών ανάπτυξης μέσω RSS .

Σύνοψη αλλαγών


  • Add missing uninstall.php to remove plugin’s database option. (1128)


  • Allow excluding URL patterns from prerendering or prefetching specifically. (1025)
  • Rename plugin to “Speculative Loading”. (1101)
  • Add Speculative Loading generator tag. (1102)
  • Bump minimum required WP version to 6.4. (1062)
  • Update tested WordPress version to 6.5. (1027)


  • Escape path prefix and restrict it to be a pathname in Speculation Rules. (951)
  • Force HTML5 script theme support when printing JSON script. (952)
  • Add icon and banner assets for plugin directory. (987)


  • Initial release of the Speculative Loading plugin as a standalone plugin. (733)