Speculation Rules

swissup/module-speculation-rules

Implements Google's Speculation Rules API for Magento 2, enabling speculative loading strategies to improve page load performance. Uses JSON configuration for prefetching and prerendering URLs.

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Supported Magento versions: 2.4.9

41,884 installs★ 1 starsLatest: v1.0.4Released 2026-02-17License: MIT

composer require swissup/module-speculation-rules

README

Reproduced from the package’s own README, under its own license, as of 2026-09-13. Links and images point back at the source repository.

Magento 2 Speculation Rules module

Description

The Speculation Rules API is a JSON-defined API developed by Google to enhance the performance of web page loading through speculative loading strategies. One more description by Mozilla MDN.

How Does It Work?

Google's Speculation Rules API is designed to target document URLs rather than specific resource files. The Speculation Rules API introduces a more expressive and configurable syntax for specifying which documents should be prefetched or prerendered. With a structure defined in JSON format within a script type="speculationrules", developers can articulate rules for both prerendering and prefetching. This enhanced flexibility allows for fine-tuning speculative loading.

Pagespeed Impact

Prerender with the Speculation Rules API

Browser Support

Can I use Speculation Rules?

Installation

For clients

cd <magento_root>
composer require swissup/module-speculation-rules
bin/magento module:enable Swissup_SpeculationRules Swissup_Core
bin/magento setup:upgrade

For maintainers

cd <magento_root>
composer require swissup/module-speculation-rules:dev-master --prefer-source
bin/magento module:enable Swissup_SpeculationRules Swissup_Core
bin/magento setup:upgrade