Jassif Team Institution

try {
  // ஒரு ReferenceError ஐ உருவாக்குவோம்
  let x = undefinedVariable;
} catch(error) {
  console.log("Error name:", error.name);        // "ReferenceError"
  console.log("Error message:", error.message);  // "undefinedVariable is not defined"
  console.log("Full error:", error);             // முழு Error பொருள்
}

// அடிப்படை தனிப்பயன் பிழை
class ValidationError extends Error {
  constructor(message) {
    super(message);
    this.name = "ValidationError";
    this.timestamp = new Date().toISOString();
  }
}

// பயன்பாடு
try {
  let age = 15;
  if (age < 18) {
    throw new ValidationError("User must be at least 18 years old");
  }
} catch(err) {
  if (err instanceof ValidationError) {
    console.log(err.name);       // "ValidationError"
    console.log(err.message);    // "User must be at least 18 years old"
    console.log(err.timestamp);  // ISO timestamp
  }
}

// NetworkError வகை
class NetworkError extends Error {
  constructor(url, status) {
    super(`Failed to fetch ${url}: Status ${status}`);
    this.name = "NetworkError";
    this.url = url;
    this.status = status;
  }
}

// DatabaseError வகை
class DatabaseError extends Error {
  constructor(operation, table, details) {
    super(`Database operation failed: ${operation} on ${table}`);
    this.name = "DatabaseError";
    this.operation = operation;
    this.table = table;
    this.details = details;
  }
}

// பயன்பாடு
try {
  throw new NetworkError("https://api.example.com/data", 404);
} catch(err) {
  if (err instanceof NetworkError) {
    console.log(`Network error for ${err.url}: ${err.status}`);
  }
}

// Error பொருள்கள் toString() முறையைக் கொண்டுள்ளன
try {
  let x = undefinedVariable;
} catch(err) {
  console.log(err.toString());  
  // "ReferenceError: undefinedVariable is not defined"
  
  console.log(String(err));     
  // "ReferenceError: undefinedVariable is not defined"
  
  console.log('' + err);        
  // "ReferenceError: undefinedVariable is not defined"
}

class CustomError extends Error {
  constructor(code, message) {
    super(message);
    this.name = "CustomError";
    this.code = code;
  }
  
  toString() {
    return `${this.name} [${this.code}]: ${this.message}`;
  }
}

// பயன்பாடு
let err = new CustomError(404, "Resource not found");
console.log(err.toString());  // "CustomError [404]: Resource not found"
console.log(String(err));     // "CustomError [404]: Resource not found"