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# html-has-lang
<html> elements must have the lang prop. This rule is largely superseded by the [`lang` rule](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/blob/HEAD/docs/rules/lang.md).
## Rule details
This rule takes no arguments.
### Succeed
```jsx
<html lang="en">
<html lang="en-US">
<html lang={language}>
```
### Fail
```jsx
<html>
```
## Accessibility guidelines
- [WCAG 3.1.1](https://www.w3.org/WAI/WCAG21/Understanding/language-of-page)
### Resources
- [axe-core, html-has-lang](https://dequeuniversity.com/rules/axe/3.2/html-has-lang)
- [axe-core, html-lang-valid](https://dequeuniversity.com/rules/axe/3.2/html-lang-valid)