for example, this code in react-router4
const oddEvent = (match, location) => {
if (!match) {
return false
}
const eventID = parseInt(match.params.eventID)
return !isNaN(eventID) && eventID % 2 === 1
}
<NavLink
to="/events/123"
isActive={oddEvent}
>Event 123</NavLink>
Why can I get this match, and location? There are no parameters for isActive= {oddEvent} here?
here is definition and incoming calls in NavLink components
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