Broadcasting to connected clients in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to send a message to all connected clients using Socket.IO.

Node.js

io.[1]('message', 'Hello clients!');

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Aconnect

Bsend

Cbroadcast

Demit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'send' instead of 'emit' on the server instance.

Trying to use 'broadcast' directly on io.

The emit method sends an event to all connected clients.

2fill in blank

medium

Complete the code to broadcast a message to all clients except the sender.

Node.js

socket.[1].emit('message', 'Hello others!');

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Abroadcast

Bto

Csend

Demit

Attempts:

3 left

💡 Hint

Common Mistakes

Using emit directly on socket sends only to sender.

Using to without specifying a room.

The broadcast property on the socket sends to all except the sender.

3fill in blank

hard

Fix the error in broadcasting a message to a specific room.

Node.js

io.to([1]).emit('message', 'Hello room!');

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Aclients

BroomName

Cbroadcast

Dsocket.id

Attempts:

3 left

💡 Hint

Common Mistakes

Passing socket.id instead of room name.

Using broadcast instead of to().

The to method requires the room name as a string.

4fill in blank

hard

Fill both blanks to broadcast a message to a room except the sender.

Node.js

socket.[1].to([2]).emit('message', 'Hello others in room!');

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Abroadcast

Bemit

Croom1

Dsocket.id

Attempts:

3 left

💡 Hint

Common Mistakes

Using emit instead of broadcast.

Passing socket.id instead of room name.

Use broadcast to exclude sender and to('room1') to target the room.

5fill in blank

hard

Fill all three blanks to send a private message to a specific client.

Node.js

io.sockets.sockets.get([1]).[2]('private', [3]);

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AtargetSocketId

Bemit

C{ text: 'Hello!' }

Dbroadcast

Attempts:

3 left

💡 Hint

Common Mistakes

Using broadcast instead of emit.

Passing a string instead of an object as message.

Get the socket by ID, then emit the event with the message object.