1# JS API Diff 2 3For details about the JS API changes in OpenHarmony 3.1 Release over OpenHarmony 3.0 LTS, see the following documents of each subsystem: 4- [Ability framework](js-apidiff-ability.md) 5- [Accessibility subsystem](js-apidiff-accessibility.md) 6- [Account subsystem](js-apidiff-account.md) 7- [ArkUI development framework](js-apidiff-ace.md) 8- [Power management subsystem](js-apidiff-battery.md) 9- [Bundle management subsystem](js-apidiff-bundle.md) 10- [Communication subsystem](js-apidiff-communicate.md) 11- [Multi-language Runtime subsystem](js-apidiff-compiler-and-runtime.md) 12- [DFX subsystem](js-apidiff-dfx.md) 13- [Distributed data management subsystem](js-apidiff-distributed-data.md) 14- [Distributed hardware subsystem](js-apidiff-distributed-hardware.md) 15- [Common event and notification subsystem](js-apidiff-event-and-notification.md) 16- [File management subsystem](js-apidiff-file-management.md) 17- [Location subsystem](js-apidiff-geolocation.md) 18- [Globalization subsystem](js-apidiff-global.md) 19- [Graphics subsystem](js-apidiff-graphic.md) 20- [Misc services subsystem](js-apidiff-misc.md) 21- [Multimodal input subsystem](js-apidiff-multi-modal-input.md) 22- [Multimedia subsystem](js-apidiff-multimedia.md) 23- [Network management subsystem](js-apidiff-network.md) 24- [Distributed scheduler subsystem](js-apidiff-resource-scheduler.md) 25- [Security subsystem](js-apidiff-security.md) 26- [Pan-sensor subsystem](js-apidiff-sensor.md) 27- [Application framework subsystem](js-apidiff-settings.md) 28- [DSoftBus subsystem](js-apidiff-soft-bus.md) 29- [Telephony subsystem](js-apidiff-telephony.md) 30- [USB subsystem](js-apidiff-usb.md) 31- [User IAM subsystem](js-apidiff-user-authentication.md) 32- [Window manager subsystem](js-apidiff-window.md) 33