Keynote: The Road To LiveView 1.0 by Chris McCord | ElixirConf EU 2023

[pillaiindu]

Thank you for your reply, and thank you for everything you are doing, all the good work, Phoenix, Phoenix LiveView and many more things! We can’t be grateful enough for all of this!

In my original post in 2019 I asked the following,

@pillaiindu

Let me explain what Optimistic UI / Latency Compensation is:

For example you’re sending a message through a chatbox.
In traditional way:

1. You typed the message
2. pressed enter or clicked send button
3. the browser sent an ajax request
4. the data was stored in the database at server
5. the server sent an OK response
6. the message got copied from the textarea to the messages list
7. the textarea got cleared.

In Optimistic UI way:

1. You typed a message
2. You pressed enter / clicked send button
3. Message got copied directly to the message list, and the text area got cleared
   → rest of the process of sending message to the server, saving to database, OK response from server everything was done in the background.

So the Latency Compensation / Optimistic UI way feels a lot faster to the user, and it makes the UI bearable if the internet is slow.

I had the Facebook/Messenger chat in my mind and I thought if that was possible with Phoenix LiveView.