@arraypress/currency-picker-astro

Astro frontend currency picker for static / SSG stores. Auto-detects the user's likely currency from navigator.language, persists choice to localStorage, rewrites every [data-price-original] element on the page on change.

The picker is a reference converter — checkout always charges in your store's native currency. Surface that disclaimer in your own copy so buyers aren't surprised.

Install

npm install @arraypress/currency-picker-astro

Use

---
import { CurrencyPicker } from '@arraypress/currency-picker-astro';
import { defaultCurrencies, defaultLocaleMap } from '@arraypress/currency-picker-astro/presets';
---
<footer>
  <CurrencyPicker
    currencies={defaultCurrencies}
    localeToCurrency={defaultLocaleMap}
  />
</footer>

Or supply your own rate table (recommended for production — keep the rates accurate to within ~24 hours):

<CurrencyPicker
  currencies={[
    { code: 'GBP', symbol: '£', label: 'British Pound (£)', rate: 1.00 },
    { code: 'USD', symbol: '$', label: 'US Dollar ($)',      rate: 1.27 },
    { code: 'EUR', symbol: '€', label: 'Euro (€)',           rate: 1.18 },
    /* … */
  ]}
  localeToCurrency={{ 'en-US': 'USD', 'fr-FR': 'EUR', /* … */ }}
/>

The first entry's code is the base currency. Every rate is expressed as 1 base = rate × other. So with 'GBP' first, 'USD' rate 1.27 means £1 = $1.27.

DOM contract

Annotate every price you want converted:

<span
  data-price-original={price}
  data-price-currency="GBP"
  class="price"
>£{price}</span>

• data-price-original — raw numeric value in data-price-currency.
• data-price-currency — ISO-4217 code. Optional — defaults to the base currency if missing.

Elements without data-price-original are skipped. Migrate gradually.

Reactive updates

When your page mutates prices client-side (variation selectors, quantity steppers, etc.), dispatch the refresh event after the swap:

document.dispatchEvent(new CustomEvent('wg:prices-updated'));

The picker re-runs the conversion pass so the new values land in the active currency.

Events

document.addEventListener('currencychange', (e) => {
  console.log('user picked', e.detail.code); // 'USD' | 'EUR' | …
});

Fires after every user-driven change. Auto-detection on first load does not fire this event.

Props

Prop	Default	Description
currencies	required	Currency list. First entry is the base.
localeToCurrency	{}	BCP-47 locale → currency code. Powers navigator.language detect.
storageKey	'ap-currency'	localStorage key for persistence.
variant	'footer'	'footer' opens up, 'header' opens down.
class	—	Extra classes on the trigger button.
label	'Choose currency'	aria-label for the trigger.

Styling

The component ships no styles — it only emits class hooks so you can theme it however you like. Hook against these:

.cp-root          { /* wrapper */ }
.cp-trigger       { /* button */ }
.cp-icon, .cp-caret
.cp-panel         { /* dropdown */ }
.cp-panel--up
.cp-panel--down
.cp-panel[data-open="true"]   { /* visible state */ }
.cp-option        { /* menu row */ }
.cp-option-code, .cp-option-label

Most theme stylesheets already define equivalents — drop your own selectors next to the rest of your design tokens.

License

MIT