Charts B

Radar

One series on radial axes, with the point and axis highlighted on hover.

data-u="radar"Family B

Example

Radar chart

Filled polygon over a hexagonal grid. Hover an axis and the title counts up to its value, with the matching tile highlighted.

<article class="u-chartb-card">
  <div class="u-chartb-panel" data-u="radar" data-u-props="{&quot;label&quot;:&quot;Active users&quot;,&quot;axes&quot;:[&quot;January&quot;,&quot;February&quot;,&quot;March&quot;,&quot;April&quot;,&quot;May&quot;,&quot;June&quot;],&quot;short&quot;:[&quot;Jan&quot;,&quot;Feb&quot;,&quot;Mar&quot;,&quot;Apr&quot;,&quot;May&quot;,&quot;Jun&quot;],&quot;max&quot;:450,&quot;periods&quot;:[{&quot;label&quot;:&quot;H1&quot;,&quot;values&quot;:[310,402,365,371,338,394],&quot;delta&quot;:4.8},{&quot;label&quot;:&quot;H2&quot;,&quot;values&quot;:[352,331,398,420,377,405],&quot;delta&quot;:6.1},{&quot;label&quot;:&quot;Last year&quot;,&quot;values&quot;:[270,298,311,286,305,322],&quot;delta&quot;:-1.9}]}"></div>
  <div class="u-chartb-copy">
    <h3>Radar chart</h3>
    <p>Filled polygon over a hexagonal grid. Hover an axis and the title counts up to its value, with the matching tile highlighted.</p>
  </div>
</article>

Installation

Just this chart, with the core and the tokens:

curl -fsSL unslop.leallabs.dev/i | sh -s add radar

Dependency Pulls in b-shell (shell for B charts). The installer downloads it and puts it in the right order.

The full card from the example, as HTML ready to paste:

curl -fsSL unslop.leallabs.dev/i | sh -s add chart-radar

Family B: shell u-chartb-card > the data-u with the u-chartb-panel class, then div.u-chartb-copy with h3 and p.

Props

They go in data-u-props, as JSON. Each item in periods becomes an option in the picker and the chart animates from the old data to the new.

Prop	Type	Default	What it does
`label`	string	no default	Small label at the top of the card.
`axes`	array	no default	Name of each axis.
`short`	array	no default	Short name for each axis, optional.
`max`	number	computed	Top of the scale. Without it, the highest value is rounded up.
`periods`	array	no default	List of `{label, delta, values}`.
`period`	number	0	Index of the period that opens selected.

Accessibility and keyboard

State and roles

Where	Attribute	What it says
chart svg	`role="img"` and `aria-label`	`"Radar chart"`.
period list	`role="listbox"`, `role="option"`	Opens with `aria-expanded` and marks the option in `aria-selected`.

Keyboard

Key	Does
Enter or Space	opens the period list
Up and down arrows	moves through the options
Esc	closes without changing
Tab	closes and moves focus on

Events and API

No public events. The period change happens inside the card.