Node.js Stack Trace Frame Regex for Python

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching node.js stack trace frame, ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# Node.js Stack Trace Frame
# ReDoS-safe | RegexVault — Dev & Systems > Log Parsing

import re

nodejs_stack_trace_frame_pattern = re.compile(r'^\s+at (?:([a-zA-Z_$][a-zA-Z0-9_$.\s<>]*) \()?([^)]+):([0-9]+):([0-9]+)\)?$')

def validate_nodejs_stack_trace_frame(value: str) -> bool:
    return bool(nodejs_stack_trace_frame_pattern.fullmatch(value))

# Example
print(validate_nodejs_stack_trace_frame("    at Object.<anonymous> (/app/index.js:10:5)"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Dev & Systems > Log Parsing category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. 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

Groups: 1=function name (optional), 2=file path, 3=line, 4=column. Node.js prefixes built-ins with 'node:'. V8 stack traces include column numbers unlike Java.