# XWUIChartDoubleBar

A double-bar chart variant backed by `XWUIChart` that draws two bars side by side at each category, the direct way to compare a pair of series category by category. It inherits the shared chart-block contract, so provide named `series` of `{ x, y }` points and choose a `block` (1-4) and `size` preset with no per-variant configuration overhead.

## Basic Usage

Two named monthly series (Series A and Series B), each spanning Jan through Jun, drawn as paired bars.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: Two six-month series rendered as a double bar chart at the md preset.
```

## Revenue vs Target by Quarter

Actual versus target revenue for each quarter of FY2025, labelled in thousands with a full-year goal line.

```example
file: examples/RevenueVsTarget.ts
html: examples/RevenueVsTarget.html
title: Revenue vs Target by Quarter
description: Paired Actual/Target bars across Q1-Q4 2025 with data labels, a "k" unit and a lineY goal annotation at the lg preset.
```

## Mobile vs Desktop Sessions by Weekday

Mobile and desktop session counts side by side for every weekday, surfacing the weekend shift to mobile.

```example
file: examples/MobileVsDesktopSessions.ts
html: examples/MobileVsDesktopSessions.html
title: Mobile vs Desktop Sessions by Weekday
description: Two device series across Mon-Sun with legend, grid values and interactive hover.
```

```api
```