assemblyscript/assemblyscript

A TypeScript-like language for WebAssembly.

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Summary Information

Updated 20 minutes ago
Added to GitGenius on September 3rd, 2026
Created on September 28th, 2017
Open Issues & Pull Requests: 203 (+0)
GitHub issues: Enabled
Number of forks: 691
Total Stargazers: 18,004 (+0)
Total Subscribers: 194 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 3.3 hours
Mean response time: 37.1 days
90th percentile: 38.0 days
Tracked items: 89

How this project is maintained

Around half of the issues opened in the past year never receive a reply. 70% of open issues come from outside the core team, so the backlog reflects real-world use rather than internal planning. Only 8% of issues opened in the past year have been closed. Three people close 64% of everything that gets resolved.

Charts & Analytics

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Issue Activity (beta)

Open issues: 43
New in 7 days: 0
Closed in 7 days: 0
Avg open age: 1,174 days
Stale 30+ days: 42
Stale 90+ days: 37

Recent activity

Opened in 7 days: 0
Closed in 7 days: 0
Comments in 7 days: 0
Events in 7 days: 0

Top labels

  • enhancement (39)
  • bug (31)
  • question (29)
  • stale (11)
  • good first issue (5)
  • compatibility (2)
  • help wanted (2)
  • standard library (2)

Most active issues this week

No issue events were indexed in the last 7 days.

Detailed Description

AssemblyScript is a TypeScript-like language that compiles to WebAssembly.

The tool addresses the need to write WebAssembly modules using a familiar syntax based on TypeScript, which is essentially JavaScript with static types. AssemblyScript compiles this variant of TypeScript to WebAssembly using Binaryen, generating optimized WebAssembly modules that can be installed and used as a standard npm package.

Developers should choose AssemblyScript when they want to write WebAssembly without learning a lower-level language, particularly if they are already comfortable with TypeScript or JavaScript. It suits projects where performance-critical code needs to run in the browser or other WebAssembly environments, and where the developer experience of using a high-level, typed language is valued. The tool produces lean WebAssembly output while remaining accessible through a simple npm installation.

The project receives issues from both core maintainers and external users, indicating real-world adoption without creating an unsustainable support burden. Maintainers typically respond to new issues and pull requests within hours. Work in the issue tracker centers on enhancements, questions, and bug reports.