Class Properties

// Deletes all user properties.
const userProperties = PropertiesService.getUserProperties();
userProperties.deleteAllProperties();

// Deletes the user property 'nickname'.
const userProperties = PropertiesService.getUserProperties();
userProperties.deleteProperty('nickname');

// Sets several properties, then logs the value of each key.
const scriptProperties = PropertiesService.getScriptProperties();
scriptProperties.setProperties({
  cow: 'moo',
  sheep: 'baa',
  chicken: 'cluck',
});
const keys = scriptProperties.getKeys();
Logger.log('Animals known:');
for (let i = 0; i < keys.length; i++) {
  Logger.log(keys[i]);
}

// Sets several script properties, then retrieves them and logs them.
const scriptProperties = PropertiesService.getScriptProperties();
scriptProperties.setProperties({
  cow: 'moo',
  sheep: 'baa',
  chicken: 'cluck',
});

const animalSounds = scriptProperties.getProperties();

// Logs:
// A chicken goes cluck!
// A cow goes moo!
// A sheep goes baa!
for (const kind in animalSounds) {
  Logger.log('A %s goes %s!', kind, animalSounds[kind]);
}

// Gets the user property 'nickname'.
const userProperties = PropertiesService.getUserProperties();
const nickname = userProperties.getProperty('nickname');
Logger.log(nickname);

// Sets multiple user properties at once.
const userProperties = PropertiesService.getUserProperties();
const newProperties = {
  nickname: 'Bob',
  region: 'US',
  language: 'EN'
};
userProperties.setProperties(newProperties);

// Sets multiple user properties at once while deleting all other user
// properties.
const userProperties = PropertiesService.getUserProperties();
const newProperties = {
  nickname: 'Bob',
  region: 'US',
  language: 'EN'
};
userProperties.setProperties(newProperties, true);

// Sets the user property 'nickname' to 'Bobby'.
const userProperties = PropertiesService.getUserProperties();
userProperties.setProperty('nickname', 'Bobby');