Dual Horizontal Bar (Tornado)

Comparison

Which side wins, and by how much? Anchor two opposing values to a shared centre line and the imbalance reads at a glance - left vs right, men vs women, before vs after. The classic population pyramid and tornado chart, where the longest bar is the story.

Example

canvas · responsive

The chart above is the same engine in every framework - only the integration code below differs.

Usage

React

import { DualHorizontalBarChart } from "@michi-vz/react";

export default () => <DualHorizontalBarChart {...props} />; // props = the chart options

Vue

<script setup>
import { DualHorizontalBarChart } from "@michi-vz/vue";
</script>

<template>
  <DualHorizontalBarChart :options="props" />
</template>

Svelte

<script>
  import { dualHorizontalBarChart } from "@michi-vz/svelte";
</script>

<div use:dualHorizontalBarChart={props}></div>

Angular

// main.ts - register the elements once
import "@michi-vz/angular";
import { applyDualHorizontalBarChartProps } from "@michi-vz/angular";

// component (uses CUSTOM_ELEMENTS_SCHEMA)
// template: <michi-vz-dual-horizontal-bar-chart #c></michi-vz-dual-horizontal-bar-chart>
applyDualHorizontalBarChartProps(this.c.nativeElement, props);

Web component

<script type="module" src="https://cdn.jsdelivr.net/npm/@michi-vz/wc"></script>

<michi-vz-dual-horizontal-bar-chart id="c"></michi-vz-dual-horizontal-bar-chart>
<script>
  Object.assign(document.getElementById("c"), props); // dataSet/series, title, …
</script>

Vanilla JS

import { mountDualHorizontalBarChart } from "@michi-vz/core";

const chart = mountDualHorizontalBarChart(el, props);
chart.update(next);
chart.getContext(); // renderer-agnostic, LLM-ready
chart.destroy();

API

Props are typed as DualHorizontalBarChartProps in @michi-vz/core. Shared across all charts: width, height, margin, colors / colorsMapping, renderer ("svg" | "canvas"), highlightItems, disabledItems, and the on* callbacks. onChartDataProcessed / getContext() return the renderer-agnostic ChartContext.