Enforce onmouseenter/onmouseover/onmouseout/onmouseleave/onhover 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.
This rule takes no arguments.
<div @mouseover="doSth" @focus="doSth"></div>
<div @mouseout="doSth" @blur="doSth"></div>
<div @mouseover="doSth"></div>