Pin speculation-rules to the script type #3007
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May 29, 2025
Co-authored-by: Daniel D. Beck <[email protected]>
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The speculation-rules feature appears as only supported in Chrome. That's not correct, it does work in Edge as well.
The reason it appears as unsupported is the inclusion of this BCD key:
html.elements.script.type.speculationrules.requires.anonymous-client-ip-when-cross-originThis key corresponds to a special case for certain types of prefetches, which rely on a Google-owned proxy server that Chrome uses. Edge doesn't have that same proxy at the moment.
I don't think this one key should block the feature from being supported in Edge in web-features.
The main thing to test for is whether
<script type="speculationrules">is implemented. So I've used this to pin the status of this feature.