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31 lines
1.2 KiB
Markdown
31 lines
1.2 KiB
Markdown
# no-onchange
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Enforce usage of `onBlur` over/in parallel with `onChange` on select menu elements for accessibility. `onBlur` **should** be used instead of `onChange`, unless absolutely necessary and it causes no negative consequences for keyboard only or screen reader users. `onBlur` is a more declarative action by the user: for instance in a dropdown, using the arrow keys to toggle between options will trigger the `onChange` event in some browsers. Regardless, when a change of context results from an `onBlur` event or an `onChange` event, the user should be notified of the change unless it occurs below the currently focused element.
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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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<select onBlur={updateModel}>
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<option/>
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</select>
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<select>
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<option onBlur={handleOnBlur} onChange={handleOnChange} />
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</select>
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```
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### Fail
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```jsx
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<select onChange={updateModel} />
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```
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## Accessibility guidelines
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- [WCAG 3.2.2](https://www.w3.org/WAI/WCAG21/Understanding/on-input)
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### Resources
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- [onChange Event Accessibility Issues](http://cita.disability.uiuc.edu/html-best-practices/auto/onchange.php)
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- [onChange Select Menu](http://www.themaninblue.com/writing/perspective/2004/10/19/)
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