Hexagon/croner

Health v2 · maintenance only

Adoption not part of the score

2586 stars · 67 forks observed · 2026-08-28

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

Croner is a zero-dependency JavaScript/TypeScript library for triggering functions on cron schedules and evaluating cron expressions. It supports advanced cron features (seconds, year, L, W, #), time zones, and runs in Node.js, Deno, Bun, and browsers.

Use cases

• run a function every 5 minutes using a cron expression
• parse and validate cron expressions in JavaScript
• get the next N run times of a cron schedule
• schedule tasks in a specific time zone
• schedule jobs in Node.js without dependencies
• check whether a date matches a cron pattern
• schedule one-off tasks at a specific datetime

When to choose

• you need cron scheduling in Node.js, Deno, Bun, or the browser with zero dependencies
• you need advanced cron syntax like L, W, #, seconds, and year fields
• you need timezone-aware scheduling or overrun protection
• you want a well-tested library used by projects like pm2 and Uptime Kuma

When to avoid

• you need persistent schedules that survive process restarts (it operates in-memory only)
• you need a distributed job queue or a standalone cron daemon
• you need scheduling outside the JavaScript ecosystem

Facets

library · maturity stable

scheduling parser date-time developer-tools web-development bun browser cross-platform cron crontab scheduler zero-dependencies timezone-support task-scheduling automation nodejs deno javascript typescript

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