{"_back":"^?panel="}
Flowchart
flowchart LR
Start([Request arrives]) --> Auth{Authenticated?}
Auth -- No --> Login[Redirect to login]
Auth -- Yes --> Handler[Run handler]
Handler --> Render[Render widgets]
Render --> Diff[Diff fragments]
Diff --> Reply([Send response])Sequence
sequenceDiagram
participant Browser
participant Server
participant DB
Browser->>Server: GET /page?x=1
Server->>DB: Query
DB-->>Server: Rows
Server-->>Browser: HTML
Browser->>Server: POST ?x=2 (Bespa-Fetch: 1)
Server-->>Browser: Partial fragments
Note over Browser: Swap by data-idState
stateDiagram-v2
[*] --> Idle
Idle --> Loading: submit
Loading --> Success: 2xx
Loading --> Error: 4xx/5xx
Success --> Idle: reset
Error --> Idle: retryGantt
gantt
title Release plan
dateFormat YYYY-MM-DD
section Design
Mockups :done, des1, 2026-05-01, 7d
Review :active, des2, 2026-05-08, 3d
section Build
Widgets : b1, after des2, 10d
Docs : b2, after b1, 5dClass
classDiagram
class Widget {
+ID() string
+Draw(w, r) error
}
class WidgetBase~T~ {
-shown bool
+RedrawIfChanged(r, keys) T
+HideIf(pred) T
}
class ChartWidget
class MermaidWidget
Widget <|.. WidgetBase
WidgetBase <|-- ChartWidget
WidgetBase <|-- MermaidWidgetZoom & pan
Wheel or pinch to zoom, drag to pan, double-click to recenter.
flowchart TB
A[Request] --> B[Router]
B --> C{Method}
C -->|GET| D[Handler GET]
C -->|POST| E[Handler POST]
D --> F[Read state]
E --> F
F --> G[Build tree]
G --> H[Draw]
H --> I[Compress]
I --> J[Response]
J --> K[Client]
K --> L{Bespa-Fetch?}
L -->|Yes| M[Swap fragments]
L -->|No| N[Replace page]