mozilla/task.js

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1628 stars · 73 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

task.js is a JavaScript library built on ES6 generators that provides a cooperative task scheduler and synchronizable events, enabling non-blocking I/O written in a synchronous style without callbacks. It was an early Mozilla experiment in making asynchronous JavaScript code look and read like sequential code.

Use cases

• write async I/O without callbacks using generators
• run multiple I/O operations concurrently and join their results
• add timeouts to async operations with try/catch error handling
• avoid callback pyramids in pre-async/await JavaScript engines
• coordinate tasks with first-class synchronizable events

When to choose

• you are stuck maintaining legacy JavaScript that must run on engines without async/await
• you want a minimal, educational example of generator-based cooperative scheduling

When to avoid

• you are starting a new project - use native async/await and Promises instead
• you need a maintained library with active support or security updates
• your runtime already supports modern async syntax, which makes task.js redundant

Facets

library · maturity abandoned

concurrency http-client developer-tools developer-tools web-development programming-languages browser cross-platform generators async-io task-scheduler cooperative-concurrency es6 callbacks nodejs javascript

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markdown · JSON · MCP: product_card(name="mozilla/task.js")