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Preserve URL query parameters and fragments in experiment redirects #185

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Merged
fulldecent merged 2 commits into from
Mar 2, 2026
Merged

Preserve URL query parameters and fragments in experiment redirects #185

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e433543
Enhance experiment redirection to preserve query parameters and fragm…
codiini Mar 2, 2026
5c5a630
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codiini Mar 2, 2026
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17 changes: 14 additions & 3 deletions source/_layouts/experiment.html
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Original file line number Diff line number Diff line change
Expand Up @@ -35,14 +35,25 @@
// Hash the experiment ID and bucket value reproducibly into a random number
const encoder = new TextEncoder();
const data = encoder.encode(experimentId + bucket);
const hashBuffer = await crypto.subtle.digest('SHA-256', data);
const hashBuffer = await crypto
.subtle
.digest('SHA-256', data);
const randomNumber = new DataView(hashBuffer).getUint32(0, true);

// Select a target
const target = targets[randomNumber % targets.length];

// Replace the current history entry with the new one
window.location.replace(target);
// Replace the current history entry with the new one, preserving query parameters and fragments
const destinationUrl = new URL(target, window.location.href);
if (!destinationUrl.search) {
destinationUrl.search = window.location.search;
}
if (!destinationUrl.hash) {
destinationUrl.hash = window.location.hash;
}
window
.location
.replace(destinationUrl.toString());
}
redirectToTarget();
</script>
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