# Exercise 0.6

```mermaid
sequenceDiagram
    participant browser
    participant server

    Note right of browser: User enters new note entry and click "Save"

    browser->>server: HTTP POST https://studies.cs.helsinki.fi/exampleapp/new_note_spa
    activate server
    server-->>browser: {"message":"note created"}
    deactivate server

    Note right of browser: The browser updates the page with the new note

```