meter

@solid-aria/meter

Meters represent a quantity within a known range, or a fractional value.

• createMeter - Provides the accessibility implementation for a meter component.

Installation

npm install @solid-aria/meter
# or
yarn add @solid-aria/meter
# or
pnpm add @solid-aria/meter

createMeter

Features

The <meter> HTML element can be used to build a meter, however it is very difficult to style cross browser. createMeter helps achieve accessible meters that can be styled as needed.

Meters are similar to progress bars, but represent a quantity as opposed to progress over time. See the createProgressBar primitive for more details about progress bars.

• Exposed to assistive technology as a meter via ARIA, with fallback to progressbar where unsupported
• Labeling support for accessibility
• Internationalized number formatting as a percentage or value

How to use it

import { AriaMeterProps, createMeter } from "@solid-aria/meter";
import { Show } from "solid-js/web";

function Meter(props: AriaMeterProps) {
  const { meterProps, labelProps, percentage } = createMeter(props);

  // Calculate the width of the progress bar as a percentage
  const barWidth = `${Math.round(percentage() * 100)}%`;

  return (
    <div {...meterProps} style={{ width: "200px" }}>
      <div style={{ display: "flex", "justify-content": "space-between" }}>
        <Show when={props.label}>
          <span {...labelProps}>{props.label}</span>
          <span>{meterProps["aria-valuetext"]}</span>
        </Show>
      </div>
      <div style={{ height: "10px", background: "gray" }}>
        <div style={{ width: barWidth, height: "10px", background: "green" }} />
      </div>
    </div>
  );
}

function App() {
  return <Meter label="Storage space" value={250} maxValue={1000} />;
}

Internationalization

Value formatting

createMeter will handle localized formatting of the value label for accessibility automatically. This is returned in the aria-valuetext prop in meterProps. You can use this to create a visible label if needed and ensure that it is formatted correctly. The number formatting can also be controlled using the formatOptions prop.

RTL

In right-to-left languages, the meter should be mirrored. Ensure that your CSS accounts for this.

Changelog

All notable changes are described in the CHANGELOG.md file.