JavaScript SDK 3.39.1 | Fastly Documentation

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Geolocation at the edge
Optimize images on the fly
Redirect URLs at the edge
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February 9, 2026

javascript-sdk fixed

Fixed

For now, go back to old behavior for default exported types. (#1298) (e6d96d4)
TransformStream shortcutting fixes (#1301) (51369ae)

Prior change: JavaScript SDK 3.39.0

Following change: JavaScript SDK 3.39.2