TypeScript Strict Mode Standards

# TypeScript Strict Mode Standards
=====================================

## Core Principles
-------------------

* **Type Safety**: Ensure that all variables, function parameters, and return types are properly typed to prevent type-related errors.
* **Code Quality**: Enforce strict coding standards to maintain high-quality, readable, and maintainable code.
* **Error Prevention**: Use TypeScript's strict mode features to catch errors at compile-time rather than runtime.

## Code Style Guidelines
------------------------

### Naming Conventions

* **Variable Names**: Use camelCase for variable names, with the first letter in lowercase (e.g., `userName`).
* **Function Names**: Use camelCase for function names, with the first letter in lowercase (e.g., `getUserName`).
* **Class Names**: Use PascalCase for class names, with the first letter in uppercase (e.g., `UserName`).
* **Interface Names**: Use PascalCase for interface names, with the first letter in uppercase (e.g., `IUserName`).

### Typing

* **Type Annotations**: Use type annotations for all variables, function parameters, and return types.
* **Type Inference**: Use type inference for variables and function return types when possible.
* **No Implicit Any**: Avoid using the `any` type; instead, use specific types or interfaces.

### Code Organization

* **File Structure**: Organize code into logical folders and files, with a clear and consistent naming convention.
* **Import Statements**: Use ES6-style import statements, with imports at the top of the file.

## Best Practices
------------------

* **Use Strict Mode**: Enable strict mode in the `tsconfig.json` file to enable all strict type checking options.
* **Use Interfaces**: Use interfaces to define the shape of objects and functions.
* **Use Type Guards**: Use type guards to narrow the type of a value within a specific scope.
* **Use Enums**: Use enums to define a set of named values.
* **Avoid Null and Undefined**: Avoid using null and undefined as types; instead, use optional types (e.g., `string | undefined`).

## Common Pitfalls to Avoid
---------------------------

* **Implicit Any**: Avoid using the `any` type, as it can lead to type-related errors.
* **Unused Variables**: Avoid declaring unused variables, as they can lead to confusion and errors.
* **Unreachable Code**: Avoid writing unreachable code, as it can lead to confusion and errors.
* **Type Assertions**: Avoid using type assertions (e.g., `as any`) unless absolutely necessary, as they can lead to type-related errors.

## Example Use Cases
---------------------

### Variable Declaration

```typescript
// Good
let userName: string = 'John Doe';

// Bad
let userName = 'John Doe'; // implicit any
```

### Function Declaration

```typescript
// Good
function getUserName(): string {
  return 'John Doe';
}

// Bad
function getUserName() { // implicit any return type
  return 'John Doe';
}
```

### Interface Declaration

```typescript
// Good
interface User {
  name: string;
  age: number;
}

// Bad
interface User {
  name: any; // implicit any
  age: number;
}
```