# Taiwan Guomin Shenfenzheng Tongyi Bianhao View

TaiwanGuominShenfenzhengTongyiBianhaoView is a headless read-only display of Taiwan's National Identification Card Number, Taiwan's government-issued personal identifier. It renders as a `<span>` with an accessible label. It is the read-only companion to TaiwanGuominShenfenzhengTongyiBianhaoInput.

**Status:** beta — implemented and unit-tested in all seven frameworks; not yet exercised in a composed flow.

## Implementation Notes

- Renders as `<span>`
- Format: One uppercase letter for the household-registration office, then nine digits. The first digit is 1 for a male and 2 for a female citizen (8 or 9 for a foreign resident), and the last digit is a check digit. The letter is converted to a two-digit number (A=10, B=11 and so on in the official order A-H, J-N, P-V, X, Y, W, Z, I, O), the eleven resulting digits are multiplied by the weights 1,9,8,7,6,5,4,3,2,1,1, and the sum must be a multiple of 10.
- Provides accessible name via the `label` prop
- Companion to TaiwanGuominShenfenzhengTongyiBianhaoInput

## Props

- `value`: string (default: "") — the identifier to display
- `label`: string (required) — accessible label via `aria-label`
- `...restProps`: any — additional HTML attributes spread onto the `<span>`

## Usage

```html
<SummaryList>
  <SummaryListItem term="National Identification Card Number">
    <TaiwanGuominShenfenzhengTongyiBianhaoView
      label="National Identification Card Number"
      value="{value}"
    />
  </SummaryListItem>
</SummaryList>
```

## ARIA

- `aria-label={label}` — provides the accessible name

## When to Use

- Use to display a stored Taiwan National Identification Card Number read-only.
- Use in summary lists, patient records, audit logs, or detail views.
- Use when the identifier should not be editable in the current context.

## When Not to Use

- Do not use for editing identifiers — use `taiwan-guomin-shenfenzheng-tongyi-bianhao-input` instead.
- Do not use for general text display — use a `<span>` directly.
- Do not use for other countries' identifiers — use the corresponding country-specific view.

## Headless

This headless component ships zero CSS. The consumer provides all styling targeting the `.taiwan-guomin-shenfenzheng-tongyi-bianhao-view` class hook.

## Testing

- Verify renders a `<span>` with the correct class
- Verify the `value` prop is rendered as text content
- Verify `aria-label` is set from the `label` prop

## Domain Knowledge

One uppercase letter for the household-registration office, then nine digits. The first digit is 1 for a male and 2 for a female citizen (8 or 9 for a foreign resident), and the last digit is a check digit. The letter is converted to a two-digit number (A=10, B=11 and so on in the official order A-H, J-N, P-V, X, Y, W, Z, I, O), the eleven resulting digits are multiplied by the weights 1,9,8,7,6,5,4,3,2,1,1, and the sum must be a multiple of 10.

**Where to find it:** Printed on the National Identification Card (國民身分證) and used for National Health Insurance, banking, tax filing and household registration.

## Related components

- `taiwan-guomin-shenfenzheng-tongyi-bianhao-input` — an input for entering Taiwan's National Identification Card Number
- `summary-list-item` — one key-value pair in a summary list

## References

- Wikipedia: [National identification card (Taiwan)](<https://en.wikipedia.org/wiki/National_identification_card_(Taiwan)>)

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