如何使用 tailwind-css 设置 Navlink(react-router-dom) 的活动 state 的样式？

Question

I am trying to use a template literal for the className of the Navlink but it does not work.

This is current code:

className={`px-2 py-2.5 hover:bg-cprimary-300 hover:text-csecond-100 rounded-md transition ${({ isActive }) => isActive ? "bg-red-500" : "bg-black-500"}`}

I tried using only the active part to check if anything else is messing with it but it still does not work.

className={`${({ isActive }) => isActive ? "bg-red-500" : "bg-blue-500"}`}

Is there something wrong with the way I am using the template literal?

It works when I use this:

className={({ isActive }) => isActive ? "bg-red-500" : "bg-blue-500"}

Answer 1

try this one. className={ px-2 py-2.5 hover:bg-cprimary-300 hover:text-csecond-100 rounded-md transition ${isActive? "bg-red-500": "bg-black-500"} px-2 py-2.5 hover:bg-cprimary-300 hover:text-csecond-100 rounded-md transition ${isActive? "bg-red-500": "bg-black-500"} }

Answer 2

The className prop takes either a string or a function callback that is passed an isActive prop and returns a string or undefined.

See NavLink

declare function NavLink( props: NavLinkProps ): React.ReactElement; interface NavLinkProps extends Omit< LinkProps, "className" | "style" | "children" > { caseSensitive?: boolean; children?: | React.ReactNode | ((props: { isActive: boolean }) => React.ReactNode); className?: | string | ((props: { isActive: boolean; }) => string | undefined); // <-- end?: boolean; style?: | React.CSSProperties | ((props: { isActive: boolean; }) => React.CSSProperties); }

Use the callback function to accept the isActive prop and return a string containing the CSS classes you want to be applied.

className={({ isActive }) => [
    "px-2 py-2.5",
    "hover:bg-cprimary-300 hover:text-csecond-100",
    "rounded-md transition",
    isActive ? "bg-red-500" : "bg-black-500"
  ].join(" ")
}