Dave McHale

Contact Form 7 no longer supports the <code>on_sent_ok</code> and <code>on_submit</code> settings available on the Additional Settings screen as of version 5.0 of CF7. Both settings were deprecated before this release, which was why this plugin was first created. <a href="https://contactform7.com/additional-settings/" rel="nofollow ugc">https://contactform7.com/additional-settings/</a>
This plugin is meant to be a band-aid to quickly get your Additional Settings working. It reads the Additional Settings data and adds a javascript block when the form is output on the page, using DOM Events as suggested by the CF7 author. <a href="https://contactform7.com/dom-events/" rel="nofollow ugc">https://contactform7.com/dom-events/</a>

Contact Form 7: Support Deprecated Settings

Provide continued support for on_sent_ok and on_submit within Contact Form 7's Additional Settings

WordPress.org

This plugin adds support for the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Speculation_Rules_API" rel="nofollow ugc">Speculation Rules API</a>, which allows defining rules by which certain URLs are dynamically prefetched or prerendered. This core Speculative Loading functionality was <a href="https://make.wordpress.org/core/2025/03/06/speculative-loading-in-6-8/" rel="nofollow ugc">merged into WordPress 6.8</a>, but it only prefetches with conservative eagerness by default. In contrast, this plugin defaults to prerendering with moderate eagerness (i.e. when interacting with a link), and it provides a user interface to customize the mode and eagerness via the “Speculative Loading” section on the Settings > Reading admin screen.
By default, speculative loading is only enabled for logged-out users, since unauthenticated pages are typically only eligible for caching and so more efficient to prefetch/prerender. This means that sites with frequent logged-in users on the frontend—such as e-commerce, forums, or membership sites—will not benefit from the feature. If your server can handle the additional load (for example, with persistent object caching), you can opt in to enable speculative loading for all logged-in users or for administrators only. This setting exclusively affects frontend pages; admin screens are always excluded.
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 <code>no-prerender</code> CSS class to any link (<code><a></code> tag) that should not be prerendered. See FAQ for more information.
<h4>Browser support</h4>
The Speculation Rules API is a new web API, and the functionality used by the plugin is supported in Chromium-based browsers such as Chrome, Edge, or Opera using version 121 or above. Other browsers such as Safari and Firefox will ignore the functionality with no ill effects; they will simply not benefit from the speculative loading. Note that certain browser extensions may disable preloading by default.
<ul>
<li><a href="https://caniuse.com/mdn-html_elements_script_type_speculationrules" rel="nofollow ugc">Browser support for the Speculation Rules API in general</a></li>
<li><a href="https://developer.chrome.com/docs/web-platform/prerender-pages" rel="nofollow ugc">Information on document rules syntax support used by the plugin</a></li>
</ul>
This plugin was formerly known as Speculation Rules.

Speculative Loading

Nice


Amazing results on install. Will continue to check this one out. 


Interesting and Impressive

Does what it needs to do.

Enables browsers to speculatively prerender or prefetch pages to achieve near-instant loads based on user interaction.

Contact Form 7: Support Deprecated Settings vs Speculative Loading