useKeyWithMouseEvents

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Diagnostic Category: lint/a11y/useKeyWithMouseEvents

JSX and TSX

Since: v1.0.0

Sources:

Same as: jsx-a11y/mouse-events-have-key-events

Description

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 screenreader users.

Examples

Invalid

<div onMouseOver={() => {}} />

code-block.jsx:1:1 lint/a11y/useKeyWithMouseEvents ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ onMouseOver must be accompanied by onFocus for accessibility.
  
  > 1 │ <div onMouseOver={() => {}} />
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Actions triggered using mouse events should have corresponding events to account for keyboard-only navigation.

<div onMouseOut={() => {}} />

code-block.jsx:1:1 lint/a11y/useKeyWithMouseEvents ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ onMouseOut must be accompanied by onBlur for accessibility.
  
  > 1 │ <div onMouseOut={() => {}} />
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Actions triggered using mouse events should have corresponding events to account for keyboard-only navigation.

Valid

<>
  <div onMouseOver={() => {}} onFocus={() => {}} />
  <div onMouseOut={() => {}} onBlur={() => {}} />
  <div onMouseOver={() => {}} {...otherProps} />
  <div onMouseOut={() => {}} {...otherProps} />
  <div onMouseOver={() => {}} onFocus={() => {}} {...otherProps} />
  <div onMouseOut={() => {}} onBlur={() => {}} {...otherProps} />
</>

Accessibility guidelines

WCAG 2.1.1

How to configure

{
  "linter": {
    "rules": {
      "a11y": {
        "useKeyWithMouseEvents": "error"
      }
    }
  }
}