# JS API Diff

For details about the JS API changes in OpenHarmony 3.1 Release over OpenHarmony 3.0 LTS, see the following documents of each subsystem:
- [Ability framework](js-apidiff-ability.md)
- [Accessibility subsystem](js-apidiff-accessibility.md)
- [Account subsystem](js-apidiff-account.md)
- [ArkUI development framework](js-apidiff-ace.md)
- [Power management subsystem](js-apidiff-battery.md)
- [Bundle management subsystem](js-apidiff-bundle.md)
- [Communication subsystem](js-apidiff-communicate.md)
- [Multi-language Runtime subsystem](js-apidiff-compiler-and-runtime.md)
- [DFX subsystem](js-apidiff-dfx.md)
- [Distributed data management subsystem](js-apidiff-distributed-data.md)
- [Distributed hardware subsystem](js-apidiff-distributed-hardware.md)
- [Common event and notification subsystem](js-apidiff-event-and-notification.md)
- [File management subsystem](js-apidiff-file-management.md)
- [Location subsystem](js-apidiff-geolocation.md)
- [Globalization subsystem](js-apidiff-global.md)
- [Graphics subsystem](js-apidiff-graphic.md)
- [Misc services subsystem](js-apidiff-misc.md)
- [Multimodal input subsystem](js-apidiff-multi-modal-input.md)
- [Multimedia subsystem](js-apidiff-multimedia.md)
- [Network management subsystem](js-apidiff-network.md)
- [Distributed scheduler subsystem](js-apidiff-resource-scheduler.md)
- [Security subsystem](js-apidiff-security.md)
- [Pan-sensor subsystem](js-apidiff-sensor.md)
- [Application framework subsystem](js-apidiff-settings.md)
- [DSoftBus subsystem](js-apidiff-soft-bus.md)
- [Telephony subsystem](js-apidiff-telephony.md)
- [USB subsystem](js-apidiff-usb.md)
- [User IAM subsystem](js-apidiff-user-authentication.md)
- [Window manager subsystem](js-apidiff-window.md)