Heartbeat

Compact availability history. Use it for monitor health and status-page evidence; retain exact values in nearby copy or a detail table.

Purpose: Compact ordered availability evidence for a monitor or public-status row.
Primitive: heartbeat.Heartbeat
Kind: components.KindHeartbeat
Configuration: Label, Caption, chronological Points, RootClass, and RootAttrs.
Accessibility: Figure name comes from Label; Caption remains visible; every point exposes timestamp, state, and optional latency in its SVG title. Empty points render an explicit no-data state.

Last seven checks: 5 up, 1 degraded, 1 down.

Usage Example

@heartbeat.Heartbeat(heartbeat.Config{
  Label: "Public API availability",
  Points: []heartbeat.Point{
    {At: checkedAt, State: heartbeat.StateUp, Latency: 42*time.Millisecond},
  },
})

No data

Absence of probes is not uptime.

No monitoring data in this period.

No data

@heartbeat.Heartbeat(heartbeat.Config{Label: "API availability"})

State contract

up, degraded, down, and unknown are distinct. Color supports scanning; figure label, SVG titles, and text summary supply meaning.