Overview

npm install eslint-plugin-reliability --save-dev

// eslint.config.js
import reliability from 'eslint-plugin-reliability';

export default [reliability.configs.recommended];

// ❌ Bad: Silent error swallowing
try {
  await processPayment(order);
} catch (e) {
  // Error is silently ignored!
}

// ✅ Good: Handle or log the error
try {
  await processPayment(order);
} catch (e) {
  logger.error('Payment processing failed', { orderId: order.id, error: e });
  throw new PaymentError('Payment failed', { cause: e });
}

// ❌ Bad: Potential runtime error
function greet(user: User | null) {
  return `Hello, ${user.name}`; // TypeError if user is null!
}

// ✅ Good: Null-safe access
function greet(user: User | null) {
  return user ? `Hello, ${user.name}` : 'Hello, guest';
}

// ❌ Bad: No timeout, can hang forever
const response = await fetch('/api/data');

// ✅ Good: Request with timeout
const controller = new AbortController();
const timeoutId = setTimeout(() => controller.abort(), 5000);

const response = await fetch('/api/data', {
  signal: controller.signal,
});
clearTimeout(timeoutId);

// ❌ Bad: Sequential requests (slow)
for (const id of userIds) {
  const user = await fetchUser(id); // N sequential requests
  results.push(user);
}

// ✅ Good: Parallel requests (fast)
const results = await Promise.all(userIds.map((id) => fetchUser(id)));