80 lines
2.7 KiB
Markdown
80 lines
2.7 KiB
Markdown
|
---
|
||
|
id: 589fc832f9fc0f352b528e79
|
||
|
title: Send and Display Chat Messages
|
||
|
challengeType: 2
|
||
|
forumTopicId: 301562
|
||
|
dashedName: send-and-display-chat-messages
|
||
|
---
|
||
|
|
||
|
# --description--
|
||
|
|
||
|
It's time you start allowing clients to send a chat message to the server to emit to all the clients! In your `client.js` file, you should see there is already a block of code handling when the message form is submitted.
|
||
|
|
||
|
```js
|
||
|
$('form').submit(function() {
|
||
|
/*logic*/
|
||
|
});
|
||
|
```
|
||
|
|
||
|
Within the form submit code, you should emit an event after you define `messageToSend` but before you clear the text box `#m`. The event should be named `'chat message'` and the data should just be `messageToSend`.
|
||
|
|
||
|
```js
|
||
|
socket.emit('chat message', messageToSend);
|
||
|
```
|
||
|
|
||
|
Now, on your server, you should be listening to the socket for the event `'chat message'` with the data being named `message`. Once the event is received, it should emit the event `'chat message'` to all sockets `io.emit` with the data being an object containing `name` and `message`.
|
||
|
|
||
|
In `client.js`, you should now listen for event `'chat message'` and, when received, append a list item to `#messages` with the name, a colon, and the message!
|
||
|
|
||
|
At this point, the chat should be fully functional and sending messages across all clients!
|
||
|
|
||
|
Submit your page when you think you've got it right. If you're running into errors, you can check out the project completed up to this point [here](https://gist.github.com/camperbot/d7af9864375207e254f73262976d2016).
|
||
|
|
||
|
# --hints--
|
||
|
|
||
|
Server should listen for `'chat message'` and then emit it properly.
|
||
|
|
||
|
```js
|
||
|
(getUserInput) =>
|
||
|
$.get(getUserInput('url') + '/_api/server.js').then(
|
||
|
(data) => {
|
||
|
assert.match(
|
||
|
data,
|
||
|
/socket.on.*('|")chat message('|")[^]*io.emit.*('|")chat message('|").*name.*message/gis,
|
||
|
'Your server should listen to the socket for "chat message" then emit to all users "chat message" with name and message in the data object'
|
||
|
);
|
||
|
},
|
||
|
(xhr) => {
|
||
|
throw new Error(xhr.statusText);
|
||
|
}
|
||
|
);
|
||
|
```
|
||
|
|
||
|
Client should properly handle and display the new data from event `'chat message'`.
|
||
|
|
||
|
```js
|
||
|
(getUserInput) =>
|
||
|
$.get(getUserInput('url') + '/public/client.js').then(
|
||
|
(data) => {
|
||
|
assert.match(
|
||
|
data,
|
||
|
/socket.on.*('|")chat message('|")[^]*messages.*li/gis,
|
||
|
'You should append a list item to #messages on your client within the "chat message" event listener to display the new message'
|
||
|
);
|
||
|
},
|
||
|
(xhr) => {
|
||
|
throw new Error(xhr.statusText);
|
||
|
}
|
||
|
);
|
||
|
```
|
||
|
|
||
|
# --solutions--
|
||
|
|
||
|
```js
|
||
|
/**
|
||
|
Backend challenges don't need solutions,
|
||
|
because they would need to be tested against a full working project.
|
||
|
Please check our contributing guidelines to learn more.
|
||
|
*/
|
||
|
```
|