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29 lines
659 B
29 lines
659 B
# lang |
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The `lang` prop on the `<html>` element must be a valid IETF's BCP 47 language tag. |
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## Rule details |
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This rule takes no arguments. |
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### Succeed |
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```jsx |
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<html lang="en"> |
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<html lang="en-US"> |
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``` |
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### Fail |
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```jsx |
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<html> |
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<html lang="foo"> |
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``` |
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## Accessibility guidelines |
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- [WCAG 3.1.1](https://www.w3.org/WAI/WCAG21/Understanding/language-of-page) |
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### Resources |
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- [axe-core, valid-lang](https://dequeuniversity.com/rules/axe/3.2/valid-lang) |
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- [Language tags in HTML and XML](https://www.w3.org/International/articles/language-tags/) |
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- [IANA Language Subtag Registry](https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry)
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