Cursor rule

1---
2description: "TypeScript coding style extending common rules"
3globs: ["**/*.ts", "**/*.tsx", "**/*.js", "**/*.jsx"]
4alwaysApply: false
5---
6# TypeScript/JavaScript Coding Style
7 
8> This file extends the common coding style rule with TypeScript/JavaScript specific content.
9 
10## Immutability
11 
12Use spread operator for immutable updates:
13 
14```typescript
15// WRONG: Mutation
16function updateUser(user, name) {
17  user.name = name  // MUTATION!
18  return user
19}
20 
21// CORRECT: Immutability
22function updateUser(user, name) {
23  return {
24    ...user,
25    name
26  }
27}
28```
29 
30## Error Handling
31 
32Use async/await with try-catch:
33 
34```typescript
35try {
36  const result = await riskyOperation()
37  return result
38} catch (error) {
39  console.error('Operation failed:', error)
40  throw new Error('Detailed user-friendly message')
41}
42```
43 
44## Input Validation
45 
46Use Zod for schema-based validation:
47 
48```typescript
49import { z } from 'zod'
50 
51const schema = z.object({
52  email: z.string().email(),
53  age: z.number().int().min(0).max(150)
54})
55 
56const validated = schema.parse(input)
57```
58 
59## Console.log
60 
61- No `console.log` statements in production code
62- Use proper logging libraries instead
63- See hooks for automatic detection
64