滚动时,我想根据ID更改颜色Links。我怎样才能做到这一点?

例:

     <div>
          <nav>
            <div className="bg-mainColor h-16 flex justify-between">
              <div className="text-white">Navbar</div>

              <div>
                <Link to="/" className="text-white">
                  Home
                </Link>
                <Link to="#first" className="text-white">
                  Features
                </Link>
                <a href="#" className="text-white">
                  Courses
                </a>
              </div>
            </div>
          </nav>

          <div className="min-h-screen" id="feature">
            Features
          </div>

          <div className="min-h-screen" id="course">
            Courses
          </div>

        </div>


查看此图片以进一步了解我
javascript - 在React或Gatsby中滚动时如何更改链接导航栏的颜色?-LMLPHP

最佳答案

您必须在链接中添加一个ID并在componentDidMount上添加一个事件侦听器:

componentDidMount() {
  document.addEventListener('scroll' , this.handleScroll)
}


而您的handleScroll就像:

handleScroll  = (event) => {
  //handle your event base on scroll in pixels or what ever for example :
  if(window.scrollY > 100) {
     let aEl = document.getElementById('YOUR_LINK_ID');
     aEl.setAttribute("style" , "color : red")

  }
}


并且不要忘记在removeEventListener上使用ComponentWillUnMount

componentWillUnMount() {
  document.removeEventListener('scroll',this.handleScroll);
}

关于javascript - 在React或Gatsby中滚动时如何更改链接导航栏的颜色?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/60235809/

10-13 07:28