#Understanding of CAS

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brazen sphinx
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Im trying to understand a script where WASD and Space are passed with a lower priority, even when the standard movement system has a higher priority.

So the standard movement system will always overwrite the CAS-Methods regarding WASD and Space so theyll never be passed to onInput?

Bildschirmfoto_2025-10-22_um_22.11.30.png
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As far as I understand the CAS, higher priorities at overlapping actions will always win so the other actions wont get triggered.

gusty hare
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cas is deprecated, use inputactionservice instead

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well its not actually deprecated, yet, but it is planned: https://devforum.roblox.com/t/client-beta-input-action-system-is-now-available-to-publish-in-experiences/3890979

Is Roblox sunsetting CAS?
Yes, we plan to sunset CAS in the future. Sunsetting means that your existing code will continue to work, but we will not make any changes to functionality, effectively deprecating the API for future use. All functionality that CAS supports will be supported by IAS before we sunset it. If you use CAS, we highly recommend migrating to IAS.

Developer Forum | Roblox
[Client Beta] Input Action System is now available to publish in ex...

Hi Creators, We are thrilled to announce that the Input Action System (IAS) is now in Client Beta and can be published in your live experiences! 🥳 Thank you for all your feedback and excitement during our Studio Beta over the past couple of months. During Client beta, you’ll be able to publish experiences that use our InputAction, InputBi...

brazen sphinx