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microsoft/fast

The adaptive interface system for modern web experiences.

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microsoft/fast has 9.5k+ stars and 600+ forks on GitHub, is written in TypeScript, and was last pushed on Oct 15, 2026. Data as of . Signed-in members get hourly updates — create a free account.

Summary Information

Updated 13 minutes ago
Type:Library / SDKCategory(s):UI Components & Design SystemsFrontend FrameworksWeb Development
Added to GitGenius on September 6th, 2026
Created on March 2nd, 2018
Open Issues & Pull Requests: 86 (+0)
GitHub issues: Enabled
Number of forks: 639
Total Stargazers: 9,679 (+0)
Total Subscribers: 120 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 47.4 hours
Mean response time: 110.8 days
90th percentile: 279.1 days
Tracked items: 179

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Maintainer activity

4 people did triage or write work on this repository in the last 12 months.

Counts unlabeled, assigned, unassigned, milestoned, demilestoned, locked, unlocked over the last 12 months. These are issue and pull request events that require triage or write permission. Commits and code review are not counted. labeled and renamed are excluded because GitHub issue forms record the issue author as the actor. Figures from October 11, 2026. This count is not comparable across projects: each project's automation decides which of these events a person emits.

How this project is maintained

Roughly one issue in four opened in the past year never receives a reply. Only 29% of open issues come from outside the core team — the tracker reads mainly as internal planning. Work labelled "status:planned" is answered fastest, typically in about an hour, while "improvement" waits about 3 months. 59% of tracked open issues have had no activity in three months. 60% of issues opened in the past year have been closed, leaving a working backlog.

Charts & Analytics

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Issue Activity (beta)

Open issues: 70
New in 7 days: 13
Closed in 7 days: 3
Avg open age: 314 days
Stale 30+ days: 58
Stale 90+ days: 35

Recent activity

Opened in 7 days: 13
Closed in 7 days: 3
Comments in 7 days: 3
Events in 7 days: 9

Top labels

  • status:triage (60)
  • area:fast-element (37)
  • status:needs-investigation (35)
  • status:planned (28)
  • feature (25)
  • area:ssr (24)
  • improvement (20)
  • breaking-change (16)

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Detailed Description

FAST is a web component library and design system framework that enables developers to build reusable UI components based on W3C Web Component standards.

FAST addresses the challenge of creating performant, standards-compliant components that work across frameworks and browsers. The core approach centers on @microsoft/fast-element, a lightweight library for building Web Components that are memory-efficient and compatible with any front-end framework or build system. This allows incremental adoption without requiring rewrites of existing code. The project also provides @fluentui/web-components, a ready-made component library built on the Fluent design language using the same foundation.

Developers should choose FAST if they need Web Components that integrate seamlessly with existing systems regardless of framework choice. It suits projects ranging from those wanting pre-built Fluent-designed components to teams building custom component libraries. The framework-agnostic nature means you can adopt FAST incrementally, mixing it with React, Vue, Angular, or vanilla JavaScript without architectural constraints.

The project maintains active community engagement through Discord and GitHub, with documented contribution pathways including good first issues for newcomers. Development is guided by a public roadmap tracking major features. The team provides comprehensive documentation covering quick starts, integration patterns, and component building, alongside a contributor guide for those wanting to participate in development.