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37 lines
1.1 KiB
Markdown
37 lines
1.1 KiB
Markdown
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# no-redundant-roles
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Some HTML elements have native semantics that are implemented by the browser. This includes default/implicit ARIA roles. Setting an ARIA role that matches its default/implicit role is redundant since it is already set by the browser.
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## Rule details
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The default options for this rule allow an implicit role of `navigation` to be applied to a `nav` element as is [advised by w3](https://www.w3.org/WAI/GL/wiki/Using_HTML5_nav_element#Example:The_.3Cnav.3E_element). The options are provided as an object keyed by HTML element name; the value is an array of implicit ARIA roles that are allowed on the specified element.
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```js
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{
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'jsx-a11y/no-redundant-roles': [
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'error',
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{
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nav: ['navigation'],
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},
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}
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```
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### Succeed
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```jsx
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<div />
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<button role="presentation" />
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<MyComponent role="main" />
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```
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### Fail
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```jsx
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<button role="button" />
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<img role="img" src="foo.jpg" />
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```
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## Accessibility guidelines
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General best practice (reference resources)
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### Resources
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- [ARIA Spec, ARIA Adds Nothing to Default Semantics of Most HTML Elements](https://www.w3.org/TR/using-aria/#aria-does-nothing)
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