Client SDK's useFlag is not returning flag when the key is camel case

[lamesjim]

Is this a support request?
This issue tracker is maintained by LaunchDarkly SDK developers and is intended for feedback on the SDK code. If you're not sure whether the problem you are having is specifically related to the SDK, or to the LaunchDarkly service overall, it may be more appropriate to contact the LaunchDarkly support team; they can help to investigate the problem and will consult the SDK team if necessary. You can submit a support request by going here or by emailing support@launchdarkly.com.

Note that issues filed on this issue tracker are publicly accessible. Do not provide any private account information on your issues. If your problem is specific to your account, you should submit a support request as described above.

Describe the bug
My application is using both the server and client SDKs. When the flag key is camel cased (e.g. myFlagKey), the client SDK doesn't return it when calling useFlags().

To reproduce

• create a flag in Launch Darkly using camel case in the key
• call useFlags from the Client SDK
• flag should be undefined

Expected behavior
useFlags() should return any flag when the key is either camel or kebab case

Logs
n/a

SDK version
^3.6.1

Language version, developer tools
Node v20.16.0
NextJS ~14.2.32
React ^18.3.1

OS/platform
MacOS 26.1 (local)
Alpine Linux 3.22 (staging)
Chrome 142.0.7444.162

[joker23]

Hey @lamesjim

Sorry for the delay - I'm happy to help if you are still running into this issue. At first glance, it seems like this you are using https://github.com/launchdarkly/react-client-sdk? Unfortunately, I am unable to recreate this issue on my end using the example provided in https://github.com/launchdarkly/react-client-sdk/tree/main/examples/typescript. Could you provide a code snippet and perhaps the flag payload from the server sdk and we can investigate further?

As an aside - one common GOTCHA for issues around client side flag availability is due to the flag not being exposed to client side queries (see this doc).

Thanks!