ov-baseline

src/ov-baseline.js

LIFTED FROM demo/baseline.html

Attributes

Properties

Events

Using it

import 'overscan'
import 'overscan/overscan.css'

<ov-baseline
  label="HR"
  unit="bpm"
  value="84"
  scale="20"
  trend-rate="2"
  baseline="72"
  baseline-by="RN KOWALSKI"
  baseline-at="2026-09-11 06:40"
  baseline-method="entered"
></ov-baseline>

import { OvBaseline } from 'overscan/react'

<OvBaseline
  label="HR"
  unit="bpm"
  value="84"
  scale="20"
  trend-rate="2"
  baseline="72"
  baseline-by="RN KOWALSKI"
  baseline-at="2026-09-11 06:40"
  baseline-method="entered"
  samples={data}
  onBaseline={handler}
  onRefuse={handler}
/>

import { OvBaseline } from 'overscan/vue'

<OvBaseline
  label="HR"
  unit="bpm"
  value="84"
  scale="20"
  trend-rate="2"
  baseline="72"
  baseline-by="RN KOWALSKI"
  baseline-at="2026-09-11 06:40"
  baseline-method="entered"
  :samples="data"
  @baseline="handler"
  @refuse="handler"
/>

import OvBaseline from 'overscan/svelte/OvBaseline.svelte'

<OvBaseline
  label="HR"
  unit="bpm"
  value="84"
  scale="20"
  trend-rate="2"
  baseline="72"
  baseline-by="RN KOWALSKI"
  baseline-at="2026-09-11 06:40"
  baseline-method="entered"
  samples={data}
  onbaseline={handler}
  onrefuse={handler}
/>

The CSS is a separate import in every framework. A single element can be imported on its own instead of the whole kit: import 'overscan/src/ov-chart.js'

A reading is set as a PROPERTY, never an attribute. An attribute is a string, so an array cannot survive one and a null arrives as the word "null", which the protocol would read as a value rather than a dropout.

Every ov: event is bound with addEventListener. The colon has no declarative spelling in Svelte 5, where the on: directive is gone and "onov:commit" is not an identifier, nor in JSX. Vue can bind it.

The wrapper applies attributes ITSELF and hands the framework nothing but a ref. All three frameworks set a prop as a property when the name exists on the element, and this kit has 77 getter-only properties across 43 elements. Assigning one throws, and in React it does not degrade: the whole tree fails to render. 13 elements have a getter-only name that is also a real attribute (at, bearing, digits, duration, floor, fov, fresh, hold, lat, lon, period, pitch, range, ring, rings, span, step, sweep, sweeps, traces, value), which are the ones a reader would naturally pass in markup.