| Fluent Design System |
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| Other names |
- Fluent UI
- Microsoft Fluent Design System
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| Original author(s) | Microsoft |
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| Developer(s) | Microsoft |
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| Initial release | 2017 (2017)
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| Release(s) |
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| Web | 8.122.15 / 15 April 2025 (2025-04-15) |
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| Windows | 2.8.7 / February 4, 2025 (2025-02-04) |
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| Android | 0.0.11 / February 12, 2021 (2021-02-12) |
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iOS
macOS | 0.2.3 / March 9, 2021 (2021-03-09) |
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| Windows | 2.6.0-prerelease.210315002 / March 17, 2021 (2021-03-17) |
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| Cross-platform | 0.23.3 / March 15, 2021 (2021-03-15) |
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| | Repository |
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| More Information |
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| | Written in | Objective-C, C++, C#, TypeScript, Kotlin, Swift, JavaScript |
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| Operating system | Android, iOS, macOS, Windows, Web browser |
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| Platform | ARM, x86-64 |
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| Predecessor | |
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| Type | Design language software |
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| License | MIT License |
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| Website | developer.microsoft.com/fluentui |
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Fluent Design System (codenamed "Project Neon") is a design language developed in 2017 by Microsoft. Fluent Design is a revamp of Microsoft Design Language 2 that includes guidelines for the designs and interactions used within software designed for all Windows 10 and Windows 11 devices and platforms. The system is based on five key components: light, depth, motion, material, and scale. The new design language includes more prominent use of motion, depth, and translucency effects.
The transition to Fluent is a long-term project; aspects of the design started appearing in Windows 10 beginning with the "Fall Creators Update" released in October 2017, as well as an update to the Xbox One system software released alongside it. It was later revealed to be designed in conjunction with Windows 10X, in addition to Windows 11 which has a similar design.
