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30 lines
659 B
30 lines
659 B
2 years ago
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# 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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