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59 lines
2.0 KiB
Markdown
59 lines
2.0 KiB
Markdown
# jsx-a11y/mouse-events-have-key-events
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💼 This rule is enabled in the following configs: ☑️ `recommended`, 🔒 `strict`.
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<!-- end auto-generated rule header -->
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Enforce onmouseover/onmouseout are accompanied by onfocus/onblur. Coding for the keyboard is important for users with physical disabilities who cannot use a mouse, AT compatibility, and screen reader users.
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## Rule options
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By default, this rule checks that `onmouseover` is paired with `onfocus` and that `onmouseout` is paired with `onblur`. This rule takes an optional argument to specify other handlers to check for "hover in" and/or "hover out" events:
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```json
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{
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"rules": {
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"jsx-a11y/mouse-events-have-key-events": [
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"error",
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{
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"hoverInHandlers": [
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"onMouseOver",
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"onMouseEnter",
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"onPointerOver",
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"onPointerEnter"
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],
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"hoverOutHandlers": [
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"onMouseOut",
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"onMouseLeave",
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"onPointerOut",
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"onPointerLeave"
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]
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}
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]
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}
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}
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```
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Note that while `onmouseover` and `onmouseout` are checked by default if no arguments are passed in, those are *not* included by default if you *do* provide an argument, so remember to explicitly include them if you want to check them.
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### Succeed
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```jsx
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<div onMouseOver={ () => void 0 } onFocus={ () => void 0 } />
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<div onMouseOut={ () => void 0 } onBlur={ () => void 0 } />
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<div onMouseOver={ () => void 0 } onFocus={ () => void 0 } {...otherProps} />
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<div onMouseOut={ () => void 0 } onBlur={ () => void 0 } {...otherProps} />
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```
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### Fail
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In example 3 and 4 below, even if otherProps contains onBlur and/or onFocus, this rule will still fail. Props should be passed down explicitly for rule to pass.
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```jsx
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<div onMouseOver={ () => void 0 } />
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<div onMouseOut={ () => void 0 } />
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<div onMouseOver={ () => void 0 } {...otherProps} />
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<div onMouseOut={ () => void 0 } {...otherProps} />
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```
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## Accessibility guidelines
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- [WCAG 2.1.1](https://www.w3.org/WAI/WCAG21/Understanding/keyboard)
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