Last updated: April 13, 2026
Regex Tester for TypeScript Developers
Quick Answer
DevToolHQ's regex tester works great alongside TypeScript. Use it to quickly regex tester during development, then integrate the pattern into your TypeScript codebase using the code example below.
Use Cases in TypeScript
- 1.Validate email, phone, and username formats
- 2.Parse and extract data from log files
- 3.Define URL routing patterns
- 4.Sanitize user input before processing
TypeScript Code Example
// TypeScript regex with strict typing
const EMAIL_RE = /^[a-zA-Z0-9._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,}$/;
function validateEmail(email: string): email is `${string}@${string}.${string}` {
return EMAIL_RE.test(email);
}
// Named group types
interface LogMatch {
date: string;
level: 'ERROR' | 'INFO' | 'WARN';
msg: string;
}
const LOG_RE = /(?<date>\d{4}-\d{2}-\d{2}) (?<level>ERROR|INFO|WARN) (?<msg>.+)/d;
function parseLog(line: string): LogMatch | null {
return (line.match(LOG_RE)?.groups as LogMatch) ?? null;
}Try the tool directly
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Frequently Asked Questions
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