An overly simplified example of a chat application. This example is so simplified that it doesn't even keep track of who is chatting.
Log on to the Jinaga Portal and create a replicator named "Chat App". Leave the replicator in the Development environment. Then click the Publish button
Copy the replicator URL and paste it into .env.local.
VITE_APP_JINAGA_REPLICATOR_URL=https://repdev.jinaga.com/get_your_own_replicator
Install the dependencies.
npm ci
Start the development server.
npm run dev
This application uses Vite. It will automatically refresh the browser when you make changes to the code. See the Vite documentation for more information.
The model for this application is very simple.
There are only two types of facts: Topic and Message.
A topic represents a conversation.
It is identified by a name.
A message is a statement made in a conversation.
It belongs in a topic and has a text property.
The model is defined in src/model/chat.ts.
Because of the overly simplistic model, this app has no security. Anyone can create a topic or post a message. Anyone can read messages. Do no post anything sensitive and do not be surprised if someone else posts something offensive.
Another consequence of the simplistic model is that there is no way to delete a message. Nor is there a way to edit a message. Once a message is posted, it is there forever.
Furthermore, there is no order to the messages. They are usually displayed in the order they were created, but that is not guaranteed.
And finally, two messages with the same text are considered to be the same message. If you post the same message twice, it will only appear once.
There are ways to correct all of these problems. We will demonstrate those in future examples.