使用Javascript对象中的字符串进行Javascript条件运算

const config = {
  isEnabled: true,
  mode: 'production'
};

if (config.isEnabled) {
  console.log('Feature is enabled');
  if (config.mode === 'production') {
    console.log('Running in production mode');
  } else {
    console.log('Running in development mode');
  }
} else {
  console.log('Feature is disabled');
}

// 错误示例
const config = {
  isEnabled: true,
  mode: 'production'
};

if (config.isenabled) { // 拼写错误
  console.log('Feature is enabled');
}

// 正确示例
if (config['isEnabled']) { // 使用引号
  console.log('Feature is enabled');
}

const userRole = {
  isAdmin: true,
  isModerator: false,
  isUser: true
};

if (userRole.isAdmin) {
  console.log('Welcome, Admin!');
} else if (userRole.isModerator) {
  console.log('Welcome, Moderator!');
} else if (userRole.isUser) {
  console.log('Welcome, User!');
} else {
  console.log('Unknown role');
}