chat.addToBlacklist(options);

let promise = chat.addToBlacklist({userIDList: ['user1', 'user2']});
promise.then(function(imResponse) {
  console.log(imResponse.data);
  console.warn('addToBlacklist error:', imError); // Failed to add the user to the blocklist
});

chat.removeFromBlacklist(options);

let promise = chat.removeFromBlacklist({userIDList: ['user1', 'user2']});
  console.log(imResponse.data);
  console.warn('removeFromBlacklist error:', imError); // Failed to remove the user from the blocklist
});

chat.getBlacklist();

let promise = chat.getBlacklist();
promise.then(function(imResponse) {
  console.log(imResponse.data);
}).catch(function(imError) {
  console.warn('getBlacklist error:', imError); // Failed to obtain the blocklist
});

let onBlacklistUpdated = function(event) {
  console.log(event.data);
};
chat.on(TencentCloudChat.EVENT.BLACKLIST_UPDATED, onBlacklistUpdated);