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光标有反转效果的侧边导航（附源代码）

源码介绍

这是一个侧边导航效果，这个展开的效果给人一种很柔和的感觉，展开后菜单内容依次显示，最后是增加了一个聚焦的圆跟随光标移动，当遇到菜单内容时会放大圆形并反转显示菜单文字，加深了对导航的交互，这里的反转色基于 mix-blend-mode: difference 实现。这个效果还有两个主题色切换，有兴趣的可以在线看效果。

使用方式

复制源代码到空白的html格式文件，在浏览中打开运行即可。

源代码

<!DOCTYPE html>
<html lang="en">
<head>
  <link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<style>
@import url('https://fonts.googleapis.com/css?family=Montserrat:100,100i,200,200i,300,300i,400,400i,500,500i,600,600i,700,700i,800,800i,900,900i');
@import url('https://fonts.googleapis.com/css?family=Poppins:400,500,600,700,800,900');

body{
 font-family: 'Montserrat', sans-serif;
 font-weight: 300;
 font-size: 15px;
 line-height: 1.7;
 color: #c4c3ca;
 background-color: #1f2029;
  background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/1462889/pat-back.svg');
  background-position: center;
  background-repeat: repeat;
  background-size: 4%;
 overflow-x: hidden;
 -webkit-transition: all 300ms linear;
 transition: all 300ms linear;
}
a {
 cursor: pointer;
}
a:hover {
 text-decoration: none;
}

/* #Cursor
================================================== */

.cursor,
.cursor2,
.cursor3{
 position: fixed;
 border-radius: 50%; 
 transform: translateX(-50%) translateY(-50%);
 pointer-events: none;
 left: -100px;
 top: 50%;
 mix-blend-mode: difference;
 -webkit-transition: all 300ms linear;
 transition: all 300ms linear;
}
.cursor{
 background-color: #fff;
 height: 0;
 width: 0;
 z-index: 99999;
}
.cursor2,.cursor3{
 height: 36px;
 width: 36px;
 z-index:99998;
 -webkit-transition:all 0.3s ease-out;
 transition:all 0.3s ease-out
}
.cursor2.hover,
.cursor3.hover{
 -webkit-transform:scale(2) translateX(-25%) translateY(-25%);
 transform:scale(2) translateX(-25%) translateY(-25%);
 border:none
}
.cursor2{
 border: 2px solid #fff;
 box-shadow: 0 0 22px rgba(255, 255, 255, 0.6);
}
.cursor2.hover{
 background: rgba(255,255,255,1);
 box-shadow: 0 0 12px rgba(255, 255, 255, 0.2);
}

@media screen and (max-width: 1200px){
 .cursor,.cursor2,.cursor3{
  display: none
 }
}

/* #Primary style
================================================== */

.section {
    position: relative;
 width: 100%;
 display: block;
}
.over-hide{
 overflow: hidden;
}
.full-height {
 height: 100vh;
}

/* #Navigation
================================================== */
 
.cd-header{
    position: fixed;
 width:100%;
 top:0;
 left:0;
 z-index:100;
} 
.header-wrapper{
    position: relative;
 width: calc(100% - 100px);
 margin-left: 50px;
} 
.logo-wrap {
 position: absolute;
 display:block;
 right:0;
 top: 40px;
 cursor: pointer;
}
.logo-wrap a {
 cursor: pointer;
 font-family: 'Montserrat', sans-serif;
 font-weight: 900;
 font-size: 20px;
 line-height: 20px;
 text-transform: uppercase;
 letter-spacing: 2px;
 color: #fff;
 transition : all 0.3s ease-out;
}
.logo-wrap a span{ 
 color: #8167a9;
}
.logo-wrap a:hover {
 opacity: 0.9;
}
.nav-but-wrap{ 
 position: relative;
 display: inline-block;
 float: left;
 padding-left: 15px;
 padding-top: 15px;
 margin-top: 26px;
 transition : all 0.3s ease-out;
}
.menu-icon {
 height: 30px;
 width: 30px;
 position: relative;
 z-index: 2;
 cursor: pointer;
 display: block;
}
.menu-icon__line {
 height: 2px;
 width: 30px;
 display: block;
 background-color: #fff;
 margin-bottom: 7px;
 cursor: pointer;
 -webkit-transition: background-color .5s ease, -webkit-transform .2s ease;
 transition: background-color .5s ease, -webkit-transform .2s ease;
 transition: transform .2s ease, background-color .5s ease;
 transition: transform .2s ease, background-color .5s ease, -webkit-transform .2s ease;
}
.menu-icon__line-left {
 width: 16.5px;
 -webkit-transition: all 200ms linear;
 transition: all 200ms linear;
}
.menu-icon__line-right {
 width: 16.5px;
 float: right;
 -webkit-transition: all 200ms linear;
 -moz-transition: all 200ms linear;
 -o-transition: all 200ms linear;
 -ms-transition: all 200ms linear;
 transition: all 200ms linear;
}
.menu-icon:hover .menu-icon__line-left,
.menu-icon:hover .menu-icon__line-right {
 width: 30px;
}
.nav {
 position: fixed;
 z-index: 98;
}
.nav:before, .nav:after {
 content: "";
 position: fixed;
  top: 20px;
  left: 50px;
 width: 0;
 height: 0;
 background-color: rgba(20, 21, 26,0.6);
 border-bottom-right-radius: 200%;
 z-index: -1;
 transition: border-radius linear 0.8s, width cubic-bezier(0.77, 0, 0.175, 1) 0.6s, height cubic-bezier(0.77, 0, 0.175, 1) 0.6s;
}
.nav:after {
 background-color: rgba(9,9,12,1);
  background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/1462889/pat.svg');
  background-position: bottom center;
  background-repeat: no-repeat;
  background-size: 300%;
 -webkit-transition-delay: 0s;
          transition-delay: 0s;
  box-shadow: 6px 7px 28px 0 rgba(16, 16, 16, 0.3);
}
.nav:before {
 -webkit-transition-delay: .2s;
          transition-delay: .2s;
}
.nav__content {
 position: fixed;
 visibility: hidden;
 top: 90px;
  left: 50px;
 width: 280px;
 text-align: left;
}
.nav__list {
 position: relative;
 padding: 0;
 margin: 0;
 z-index: 2;
}
.nav__list-item {
 position: relative;
 display: block;
 -webkit-transition-delay: 0.8s;
          transition-delay: 0.8s;
 opacity: 0;
 text-align: left;
 color: #fff;
 overflow: hidden; 
 font-family: 'Poppins', sans-serif;
 font-size: 22px;
 line-height: 1.2;
 letter-spacing: 2px;
 -webkit-transform: translate(30px, 0%);
          transform: translate(30px, 0%);
 -webkit-transition: opacity .2s ease, -webkit-transform .3s ease;
 transition: opacity .2s ease, -webkit-transform .2s ease;
 transition: opacity .2s ease, transform .2s ease;
 transition: opacity .2s ease, transform .2s ease, -webkit-transform .2s ease;
  margin-top: 7px;
  margin-bottom: 7px;
}
.nav__list-item a{ 
 position: relative;
 text-decoration: none;
 color: rgba(255,255,255,0.6);
 overflow: hidden; 
 cursor: pointer;
 font-family: 'Poppins', sans-serif;
 font-weight: 600;
 z-index: 2;
  padding-left: 40px;
  padding-top:5px;
  padding-bottom: 5px;
 display: inline-block;
    -webkit-transition: all 200ms linear;
    transition: all 200ms linear; 
}
.nav__list-item a:after{ 
 position: absolute;
 content: '';
 top: 50%;
 left: 0;
 width: 5px;
 height: 0;
 opacity: 0;
 background-color: #8167a9;
 z-index: 1;
    -webkit-transition: all 200ms linear;
    transition: all 200ms linear; 
}
.nav__list-item a:hover:after{ 
 height: 100%;
 opacity: 1;
 top: 0;
}
.nav__list-item a:hover{
 color: rgba(255,255,255,1);
}
.nav__list-item.active-nav a{
 color: rgba(255,255,255,1);
}
.nav__list-item.active-nav a:after{ 
 height: 100%;
 opacity: 1;
 top: 0;
}
body.nav-active .nav__content {
 visibility: visible;
}
body.nav-active .menu-icon__line {
 background-color: #fff;
 -webkit-transform: translate(0px, 0px) rotate(-45deg);
          transform: translate(0px, 0px) rotate(-45deg);
}
body.nav-active .menu-icon__line-left {
 width: 15px;
 -webkit-transform: translate(2px, 4px) rotate(45deg);
          transform: translate(2px, 4px) rotate(45deg);
}
body.nav-active .menu-icon__line-right {
 width: 15px;
 float: right;
 -webkit-transform: translate(-3px, -3.5px) rotate(45deg);
          transform: translate(-3px, -3.5px) rotate(45deg);
}
body.nav-active .menu-icon:hover .menu-icon__line-left,
body.nav-active .menu-icon:hover .menu-icon__line-right {
 width: 15px;
}
body.nav-active .nav {
 visibility: visible;
}
body.nav-active .nav:before, body.nav-active .nav:after {
 width: 250px;
 height: 350px;
 border-radius: 15px;
}
body.nav-active .nav:after {
 -webkit-transition-delay: .1s;
          transition-delay: .1s;
}
body.nav-active .nav:before {
 -webkit-transition-delay: 0s;
          transition-delay: 0s;
}
body.nav-active .nav__list-item {
 opacity: 1;
 -webkit-transform: translateX(0%);
          transform: translateX(0%);
 -webkit-transition: opacity .3s ease, color .3s ease, -webkit-transform .3s ease;
 transition: opacity .3s ease, color .3s ease, -webkit-transform .3s ease;
 transition: opacity .3s ease, transform .3s ease, color .3s ease;
 transition: opacity .3s ease, transform .3s ease, color .3s ease, -webkit-transform .3s ease;
}
body.nav-active .nav__list-item:nth-child(0) {
 -webkit-transition-delay: 0.7s;
          transition-delay: 0.7s;
}
body.nav-active .nav__list-item:nth-child(1) {
 -webkit-transition-delay: 0.8s;
          transition-delay: 0.8s;
}
body.nav-active .nav__list-item:nth-child(2) {
 -webkit-transition-delay: 0.9s;
          transition-delay: 0.9s;
}
body.nav-active .nav__list-item:nth-child(3) {
 -webkit-transition-delay: 1s;
          transition-delay: 1s;
}
body.nav-active .nav__list-item:nth-child(4) {
 -webkit-transition-delay: 1.1s;
          transition-delay: 1.1s;
}
body.nav-active .nav__list-item:nth-child(5) {
 -webkit-transition-delay: 1.2s;
          transition-delay: 1.2s;
}
body.nav-active .nav__list-item:nth-child(6) {
 -webkit-transition-delay: 1.3s;
          transition-delay: 1.3s;
}
body.nav-active .nav__list-item:nth-child(7) {
 -webkit-transition-delay: 1.4s;
          transition-delay: 1.4s;
}
body.nav-active .nav__list-item:nth-child(8) {
 -webkit-transition-delay: 1.5s;
          transition-delay: 1.5s;
}
body.nav-active .nav__list-item:nth-child(9) {
 -webkit-transition-delay: 1.6s;
          transition-delay: 1.6s;
}
body.nav-active .nav__list-item:nth-child(10) {
 -webkit-transition-delay: 1.7s;
          transition-delay: 1.7s;
}

.switch-wrap {
 position: absolute;
 top: 50%;
 left: 0;
 z-index: 10;
    transform: translateY(-50%);
 width: 100%;
 -webkit-transition: all 500ms linear;
 transition: all 500ms linear; 
 margin: 0 auto;
 text-align: center;
}
.switch-wrap h1 {
 font-weight: 900;
 font-size: 46px;
 line-height: 1;
 color: #fff;
 text-align: center;
 text-transform: uppercase;
 margin-bottom: 40px;
 -webkit-transition: all 300ms linear;
 transition: all 300ms linear; 
}
@media screen and (max-width: 580px){
  .switch-wrap h1 {
    font-size: 32px;
  }
}
.switch-wrap p {
 font-weight: 600;
 font-size: 14px;
 letter-spacing: 1px;
 line-height: 1;
 color: #8167a9;
 text-align: center;
 margin-top: 15px;
}
.switch-wrap p span {
 position: relative;
}
.switch-wrap p span:before {
 position: absolute;
 content: '';
 width: 100%;
 height: 2px;
 background-color: #fff;
 left: 0;
 bottom: -4px;
 -webkit-transition: all 300ms linear;
 transition: all 300ms linear; 
}
.switch-wrap p span:nth-child(2):before {
 opacity: 0;
}
#switch,
#circle {
 cursor: pointer;
 -webkit-transition: all 300ms linear;
 transition: all 300ms linear; 
} 
#switch {
 width: 60px;
 height: 8px;
 margin: 0 auto;
 text-align: center;
 border: 2px solid #000;
 border-radius: 27px;
 background: #8167a9;
 position: relative;
 display: inline-block;
}
#circle {
 position: absolute;
 top: -11px;
 left: -13px;
 width: 26px;
 height: 26px;
 border-radius: 50%;
 box-shadow: 0 4px 4px rgba(26,53,71,0.25), 0 0 0 1px rgba(26,53,71,0.07);
 background: #fff;
}
.switched {
 border-color: #8167a9 !important;
 background: #000 !important;
}
.switched #circle {
 left: 43px;
 background: #000;
}

/* #Light
================================================== */

body.light{
 background-color: #fff;
}
body.light .cursor,
body.light .cursor2,
body.light .cursor3{
 mix-blend-mode: normal;
}
body.light .cursor2{
 border: 2px solid #1f2029;
 box-shadow: 0 0 4px rgba(0, 0, 0, 0.1);
}
body.light .cursor2.hover{
 background: rgba(0,0,0,0.06);
 box-shadow: 0 0 2px rgba(0, 0, 0, 0.1);
 border-color: transparent;
}
body.light .logo-wrap a {
 color: #1f2029;
}
body.light .menu-icon__line {
 background-color: #1f2029;
}
body.light .nav:before {
 background-color: rgba(235, 235, 235,0.4);
}
body.light .nav:after {
 background-color: rgb(246,239,249);
  box-shadow: 6px 6px 22px rgba(42, 31, 63, 0.1);
}
body.light .nav__list-item a{ 
 color: rgba(0,0,0,0.6); 
}
body.light .nav__list-item a:hover{
 color: #1f2029;
}
body.light .nav__list-item.active-nav a{
 color: #1f2029;
}
body.light .switch-wrap h1 {
 color: #000;
}
body.light .switch-wrap p span:nth-child(2):before {
 opacity: 1;
 background-color: #000;
}
body.light .switch-wrap p span:nth-child(1):before {
 opacity: 0;
}

/* #Link to page
================================================== */
.link-to-portfolio {
   position: fixed;
    bottom: 40px;
    right: 50px;
    z-index: 200;
    cursor: pointer;
    width: 50px;
    height: 50px;
    text-align: center;
    border-radius: 3px;
    background-position: center center;
    background-size: 65%;
  background-repeat: no-repeat;
    background-image: url('https://assets.codepen.io/1462889/fcy.png');
    box-shadow: 0 0 0 2px rgba(255,255,255,.1);
    transition: opacity .2s, border-radius .2s, box-shadow .2s;
    transition-timing-function: ease-out;
}
.link-to-portfolio:hover {
    opacity: 0.8;
    border-radius: 50%;
    box-shadow: 0 0 0 20px rgba(255,255,255,.1);
}
</style>
</head>

<body>
   <header class="cd-header">
  <div class="header-wrapper">
   <div class="logo-wrap">
    <a href="#" class="hover-target"><span>your</span>logo</a>
   </div>
   <div class="nav-but-wrap">
    <div class="menu-icon hover-target">
     <span class="menu-icon__line menu-icon__line-left"></span>
     <span class="menu-icon__line"></span>
     <span class="menu-icon__line menu-icon__line-right"></span>
    </div>     
   </div>     
  </div>    
 </header>

 <div class="nav">
  <div class="nav__content">
   <ul class="nav__list">
    <li class="nav__list-item active-nav"><a href="#" class="hover-target">Home</a></li>
    <li class="nav__list-item"><a href="#" class="hover-target">Portfolio</a></li>
    <li class="nav__list-item"><a href="#" class="hover-target">Studio</a></li>
    <li class="nav__list-item"><a href="#" class="hover-target">News</a></li>
    <li class="nav__list-item"><a href="#" class="hover-target">Contact</a></li>
   </ul>
  </div>
 </div>  

 <div class="section full-height over-hide"> 
  <div class="switch-wrap">
   <h1>Drop-down menu</h1>
   <div id="switch" class="hover-target">
    <div id="circle"></div>
   </div>
   <p><span>dark</span> - <span>light</span></p>
  </div>
 </div> 
 
 <div class='cursor' id="cursor"></div>
 <div class='cursor2' id="cursor2"></div>
 <div class='cursor3' id="cursor3"></div>

<!-- Link to page
================================================== -->

<a href="https://front.codes/" class="link-to-portfolio hover-target" target=”_blank”></a>
</body>
<script>


/* Please ❤ this if you like it! */


(function($) { "use strict";
  
 //Page cursors

    document.getElementsByTagName("body")[0].addEventListener("mousemove", function(n) {
        t.style.left = n.clientX + "px", 
  t.style.top = n.clientY + "px", 
  e.style.left = n.clientX + "px", 
  e.style.top = n.clientY + "px", 
  i.style.left = n.clientX + "px", 
  i.style.top = n.clientY + "px"
    });
    var t = document.getElementById("cursor"),
        e = document.getElementById("cursor2"),
        i = document.getElementById("cursor3");
    function n(t) {
        e.classList.add("hover"), i.classList.add("hover")
    }
    function s(t) {
        e.classList.remove("hover"), i.classList.remove("hover")
    }
    s();
    for (var r = document.querySelectorAll(".hover-target"), a = r.length - 1; a >= 0; a--) {
        o(r[a])
    }
    function o(t) {
        t.addEventListener("mouseover", n), t.addEventListener("mouseout", s)
    }
 
 //Navigation

 var app = function () {
  var body = undefined;
  var menu = undefined;
  var menuItems = undefined;
  var init = function init() {
   body = document.querySelector('body');
   menu = document.querySelector('.menu-icon');
   menuItems = document.querySelectorAll('.nav__list-item');
   applyListeners();
  };
  var applyListeners = function applyListeners() {
   menu.addEventListener('click', function () {
    return toggleClass(body, 'nav-active');
   });
  };
  var toggleClass = function toggleClass(element, stringClass) {
   if (element.classList.contains(stringClass)) element.classList.remove(stringClass);else element.classList.add(stringClass);
  };
  init();
 }();

 
 //Switch light/dark
 
 $("#switch").on('click', function () {
  if ($("body").hasClass("light")) {
   $("body").removeClass("light");
   $("#switch").removeClass("switched");
  }
  else {
   $("body").addClass("light");
   $("#switch").addClass("switched");
  }
 });          
              
})(jQuery); 
</script>
</html>

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