JavaScript SDK 3.36.0 | Fastly Documentation

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Next-Gen WAF
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Streaming logs
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Tutorials
Step-by-step guides to developing with Fastly
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Edge deploy Next-Gen WAF
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Demos
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Passwordless auth
Fanout chat
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Authentication
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Geolocation at the edge
Optimize images on the fly
Redirect URLs at the edge
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November 18, 2025

javascript-sdk fixed added

Added

Image Optimizer support (#1224) (c3dd3de)
Implement 103 Early Hints (#1217) (fda6ad3)

Fixed

fanout: commit request headers before fanout handoff (#1222) (8dfefad)
Fix broken KVStore test (#1223) (6055d88)

Prior change: JavaScript SDK 3.35.2