Cron Named Shortcut (@reboot, @daily, etc.) Regex for JavaScript

What this pattern does

This page provides a well-structured, multi-part regular expression for matching cron named shortcut (@reboot, @daily, etc.), ported and verified for JavaScript. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// Cron Named Shortcut (@reboot, @daily, etc.)
// ReDoS-safe | RegexVault — Dev & Systems > Cron

const cronNamedShortcutRebootDailyEtcRegex = /^@(?:reboot|yearly|annually|monthly|weekly|daily|midnight|hourly)$/i;

function validateCronNamedShortcutRebootDailyEtc(input: string): boolean {
  return cronNamedShortcutRebootDailyEtcRegex.test(input);
}

// Example
console.log(validateCronNamedShortcutRebootDailyEtc("@reboot")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Dev & Systems > Cron category and carries a ReDoS-safe certification. That matters for JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

These are Vixie cron convenience shortcuts. @annually is a synonym for @yearly. @midnight is a synonym for @daily. Not available in all cron implementations.