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# Image | ||
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Toont een afbeelding. | ||
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## Richtlijnen | ||
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- Vergeet niet om een beschrijving van de afbeelding op te nemen in het `alt`-attribuut. | ||
Dit zorgt ervoor dat gebruikers van schermlezers deze informatie ook tot zich kunnen nemen. | ||
Daarnaast kan het helpen bij zoekmachineoptimalisatie. | ||
- Alleen voor decoratieve afbeeldingen is zo’n beschrijving niet nodig. Gebruik in dit geval `alt=""`. | ||
Denk aan afbeeldingen die weinig toevoegen aan de nabije tekst of afbeeldingen die louter bijdragen aan het ontwerp of de sfeer van de pagina (bron: [W3C Web Accessibility Initiative](https://www.w3.org/WAI/tutorials/images/decorative/)). | ||
- Zorg ervoor dat de afbeelding een beeldverhouding heeft die ondersteund wordt door het [Aspect Ratio](?path=/docs/layout-aspect-ratio--docs) component. | ||
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## Relevante WCAG-eisen | ||
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- [WCAG 1.1.1](https://www.w3.org/TR/WCAG22/#non-text-content): niet-tekstuele content heeft een tekstueel alternatief | ||
- [WCAG 1.4.5](https://www.w3.org/TR/WCAG22/#images-of-text): gebruik tekst in plaats van afbeeldingen van tekst | ||
- [WCAG 1.4.9](https://www.w3.org/TR/WCAG22/#images-of-text-no-exception): gebruik afbeeldingen van tekst alleen als er geen alternatief is |
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/** | ||
* @license EUPL-1.2+ | ||
* Copyright (c) 2023 Gemeente Amsterdam | ||
*/ | ||
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.amsterdam-image { | ||
font-style: italic; /* [3] */ | ||
height: auto; /* [1] */ | ||
max-width: 100%; /* [1] */ | ||
vertical-align: middle; /* [2] */ | ||
} | ||
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// [1] Allow for fluid image sizing while maintaining aspect ratio governed by width/height attributes | ||
// [2] Remove ‘phantom’ whitespace | ||
// [3] Italicise alt text to visually offset it from surrounding copy | ||
// Source: https://x.com/csswizardry/status/1717841334462005661 |
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import { render } from '@testing-library/react' | ||
import { createRef } from 'react' | ||
import { Image } from './Image' | ||
import '@testing-library/jest-dom' | ||
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describe('Image', () => { | ||
it('renders', () => { | ||
const { container } = render(<Image />) | ||
const component = container.querySelector(':only-child') | ||
expect(component).toBeInTheDocument() | ||
expect(component).toBeVisible() | ||
}) | ||
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it('renders a design system BEM class name', () => { | ||
const { container } = render(<Image />) | ||
const component = container.querySelector(':only-child') | ||
expect(component).toHaveClass('amsterdam-image') | ||
}) | ||
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it('renders an additional class name', () => { | ||
const { container } = render(<Image className="extra" />) | ||
const component = container.querySelector(':only-child') | ||
expect(component).toHaveClass('extra') | ||
expect(component).toHaveClass('amsterdam-image') | ||
}) | ||
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it('supports ForwardRef in React', () => { | ||
const ref = createRef<HTMLImageElement>() | ||
const { container } = render(<Image ref={ref} />) | ||
const component = container.querySelector(':only-child') | ||
expect(ref.current).toBe(component) | ||
}) | ||
}) |
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/** | ||
* @license EUPL-1.2+ | ||
* Copyright (c) 2023 Gemeente Amsterdam | ||
*/ | ||
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import clsx from 'clsx' | ||
import { ForwardedRef, forwardRef, ImgHTMLAttributes } from 'react' | ||
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export interface ImageProps extends ImgHTMLAttributes<HTMLImageElement> {} | ||
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export const Image = forwardRef(({ className, ...restProps }: ImageProps, ref: ForwardedRef<HTMLImageElement>) => ( | ||
<img {...restProps} ref={ref} className={clsx('amsterdam-image', className)} /> | ||
)) | ||
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Image.displayName = 'Image' |
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# React Image component | ||
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[Image documentation](../../../css/src/image/README.md) |
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export { Image } from './Image' | ||
export type { ImageProps } from './Image' |
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