AWS EventBridge Rate Expression Regex for JavaScript

What this pattern does

This page provides a well-structured, multi-part regular expression for matching aws eventbridge rate expression, 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

// AWS EventBridge Rate Expression
// ReDoS-safe | RegexVault — Dev & Systems > Cron

const awsEventbridgeRateExpressionRegex = /^rate\((?:1 (minute|hour|day)|[2-9][0-9]* (minutes|hours|days))\)$/;

function validateAwsEventbridgeRateExpression(input: string): boolean {
  return awsEventbridgeRateExpressionRegex.test(input);
}

// Example
console.log(validateAwsEventbridgeRateExpression("rate(1 minute)")); // 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

AWS requires singular units (minute, hour, day) when the value is 1, and plural otherwise. Validate singular/plural agreement in application code. Capture group 1 = value, group 2 = unit.