Target Active Link when the route is active in Next.js

问题

How to target the active Link in Next.js like they way we do it in React-Router-4? Meaning, give the active link a class when its route is active?

回答1:

First, you need to have a component called Link, with temporary attribute activeClassName

import { withRouter } from 'next/router'
import Link from 'next/link'
import React, { Children } from 'react'

const ActiveLink = ({ router, children, ...props }) => {
  const child = Children.only(children)

  let className = child.props.className || null
  if (router.pathname === props.href && props.activeClassName) {
    className = `${className !== null ? className : ''} ${props.activeClassName}`.trim()
  }

  delete props.activeClassName

  return <Link {...props}>{React.cloneElement(child, { className })}</Link>
}

export default withRouter(ActiveLink)

Then have a navigation bar with created component Link and css selector :active to differentiate between active and inactive link.

import Link from './Link'

export default () => (
  <nav>
    <style jsx>{`
      .active:after {
        content: ' (current page)';
      }
      .nav-link {
        text-decoration: none;
        padding: 10px;
        display: block;
      }
    `}</style>

    <ul>
      <li>
        <Link activeClassName='active' href='/'>
          <a className='nav-link home-link'>Home</a>
        </Link>
      </li>
      <li>
        <Link activeClassName='active' href='/about'>
          <a className='nav-link'>About</a>
        </Link>
      </li>
    </ul>
  </nav>
)

After that, you can implement the navigation bar to your page:

import Nav from '../components/Nav'

export default () => (
  <div>
    <Nav />
    <p>Hello, I'm the home page</p>
  </div>
)

The key of how does this work is located inside component Link, we compare the value of router.pathname with attribute href from the Link, if the value match the other then put specific className to make the link looks activated.

Reference: here

回答2:

A simple solution based on the useRouter hook:

import Link from "next/link";
import { useRouter } from "next/router";


export const MyNav = () => {

  const router = useRouter();

  return (
    <ul>
      <li className={router.pathname == "/" ? "active" : ""}>
        <Link href="/">home</Link>
      </li>
      <li className={router.pathname == "/about" ? "active" : ""}>
        <Link href="/about">about</Link>
      </li>
    </ul>
  );
};

回答3:

Another minimal version which supports as prop:

import Link from "next/link";
import {withRouter} from "next/router";
import {Children} from "react";
import React from "react";

export default withRouter(({router, children, as, href, ...rest}) => (
   <Link {...rest} href={href} as={as}>
      {React.cloneElement(Children.only(children), {
         className: (router.asPath === href || router.asPath === as) ? `active` : null
      })}
   </Link>
));

来源：https://stackoverflow.com/questions/53262263/target-active-link-when-the-route-is-active-in-next-js

标签

reactjs

react-router

next.js