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前言

又是一年中秋至，漂泊异乡的你是否又会看着月亮思念故乡的亲人，又或是想起了天涯海角的友人！这篇文章我将以程序员的方式用代码写出“海上生明月”中秋节网页特效，在此献给广大网友，祝你们中秋快乐！

海上生明月天涯共此时

因为这个代码用到了这两句诗，特此提出来供各位盆友欣赏一下，作为码农的我们，长期处于电脑屏幕前看着枯燥的代码，或由于工作繁忙而导致的压力，因此很少有时间去陶冶情操，放松身心！因此在看代码前先请各位欣赏诗句，就如同我们现在回看初高中的语文课本，又会有不一样的感触，后悔当时没能好好体悟！毕竟谁的心里不藏着一个文艺小青年呢！

望月怀远作者：张九龄（唐代）海上生明月，天涯共此时。情人怨遥夜，竟夕起相思。灭烛怜光满，披衣觉露滋。不堪盈手赠，还寝梦佳期。

在这里插入图片描述
《望月怀远》是作者在离乡时，望月而思念远方亲人及妻子而写的，“海上生明月天涯共此时”，意思是指辽阔无边的大海上升起一轮明月，诗人想起了远在天涯海角的友人，此时此刻他也和我一样望着同一轮明月。诗是通过主人公望月时思潮起伏的描写，来表达诗人对远方之人殷切怀念的情思。
好了，接下来我们步入正题！

代码主体思路

1. 首先，我们要创建一个定时器，使得月亮 div id=“moon” 不断上升！
2. 当月亮上升到距离顶部120像素时，清除定时器，月亮上升停止！
3. 当月亮停止之后，让里面的诗句逐字（定时器实现）显示，让嫦娥图片显示！
4. 一系列 div class=“stars” 是创建夜空中的星星，并加上css动画让其动起来！
5. div id=“water” 是底部涌动的海水

代码

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>海面月亮升起中秋节特效</title>
    <link rel="stylesheet" href="css/style.css">
    <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
</head>
<body> 
  <div id="bg">
      <div class="stars"></div>
      <div class="stars"></div>
      <div class="stars"></div>
      <div class="stars"></div>
      <div class="stars"></div>
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      <div class="stars"></div>
      <div class="stars"></div>
      <div id="water"></div>
      <div id="moon"></div>
  </div>
<script>
    $(document).ready(function(){
      var poem1=["海","上","升","明","月"];
      var poem2=["天","涯","共","此","时"];
      var moon=document.getElementById("moon");
      var water=document.getElementById("water"); 
      moon.style.top = 670 + "px";
      var timer=setInterval(function(){
          moon.style.top=moon.offsetTop - 15 + "px";
          //如果月亮上升到距离顶部小于120像素，清除定时器让月亮停止上升
          if(moon.offsetTop <= 120){
            clearInterval(timer);
            // 创建上半句诗句的元素
            var a = document.createElement("div");
            a.className="poem-1";
            moon.appendChild(a);
            var poem_1=document.getElementsByClassName("poem-1");
            // 添加嫦娥图片
            moon.innerHTML+="<img id='girl' src='images/girl.png'>";
            var girl=document.getElementById("girl");
            girl.style.animation="appear 6s linear";
            //调用word函数让上半句诗句动态显示
            word(poem_1[0],500,poem1); 
            //显示一个字需要500毫秒，上半句5个字则需2.5秒，2.5秒后开始显示下半句
            var timeOut=setTimeout(function() {
                var b=document.createElement("div");
                b.className="poem-2";
                moon.appendChild(b);
                var poem_2=document.getElementsByClassName("poem-2");
                //调用word函数让下半句诗句动态显示
                word(poem_2[0],500,poem2);
                clearTimeout(timeOut);
              }, 2500);
          } 
      },100);
         
      //制造星星
      function createStar(starNum,element,element2,scal,deg,rotY,rotX){
        var stars=starNum;
        var $stars=$(element);
        var r=2000;
        for(var i=0;i<stars;i++){
            var $star=$("<div/>").addClass(element2);
            $stars.append($star);
          }
        $("." + element2).each(function(){
            var cur=$(this);
            var s=0.2+(Math.random()*scal);
            var curR=r+(Math.random()*deg);
            cur.css({ 
              transformOrigin:"0 0 "+curR+"px",
              transform:" translate3d(0,0,-"+curR+"px) rotateY("+(Math.random()*rotY)+"deg) rotateX("+(Math.random()*rotX)+"deg) rotateY("+-10+"deg) scale("+s+","+s+")"})
          })
      }

      createStar(40,".stars","star",1,300,360,-100);


      //字
      function word(className,dur,array){
          var i = 0;
          var timeName=setInterval(function(){
          className.style.animation="appear 4s linear";
          var p = document.createElement("p");
          p.innerHTML=array[i];
          className.appendChild(p);
          i++;
          if(i>=array.length){
            clearInterval(timeName);
          }
        },dur);
      }
        
    })  
          
</script>
<!-- 底部大海波浪 -->
<script>
/**
 * id: 要获取的div元素的id属性
 * width: 每一个wave柱体的宽度，单位px
 * duration: 每一个wave柱体上下运动一个循环的时长，单位s
 * delay: 当前运动的这个柱体相对于上一个柱体开始运动的延时，单位s
 */
  function addWaves(id, width, duration, delay) {
    var ocean = document.getElementById(id)
    var count = Math.floor(ocean.clientWidth/width)
    var docFrag = document.createDocumentFragment()
    for(let i = 0; i < count; i ++) {
      let wave = document.createElement("div")
      wave.className = "wave"
      wave.style.width = width + "px"
      wave.style.left = (width * i) + "px"
      wave.style.animationDelay = (i * delay) + "s"
      wave.style.animationDuration = duration + "s"
      docFrag.appendChild(wave)
    }
    ocean.appendChild(docFrag)
  }
  addWaves("water", 5, 2, 1/100)
</script>
</body>
</html>

style.css

html,body{
  padding: 0px;
  margin: 0px;
  overflow: hidden;
}


#bg{
  height: 100vh;
  width: auto;
  /* 背景渐变 */
  background: radial-gradient(150% 95% at bottom center,rgb(67, 19, 122) 20%,rgb(6,6,70) 55%,rgb(7,7,70) 70%,rgb(18, 2, 56) 85%,rgb(5, 1, 22) 100%);
  overflow: hidden;
  z-index: 1;
}


#moon{
  height: 400px;
  width: 400px;
  background-color:rgb(250, 246, 227);
  border-radius: 50%;
  z-index: 1;
  position: absolute;
  left: 40%;
  box-shadow: 0 0 50px rgba(251,255, 254, 2);
}

/* 星星动画 */
@keyframes rotate {
  0% {
    transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(0);
  }
  100% {
    transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(-360deg);
  }
}

.stars{
  transform: perspective(500px);
  transform-style: preserve-3d;
  position: absolute;
  bottom: 0;
  perspective-origin: 50% 100%;
  left: 50%;
  animation: rotate 270s infinite linear;
}

.stars .star {
  width: 2px;
  height: 2px;
  background: rgb(247, 204, 232);
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0 -300px;
  transform: translate3d(0, 0, -300px);
  backface-visibility: hidden;
}


#girl{
  width: 150px;
  height: 150px;
  position: absolute;
  left: 64%;
  top: 28%;
  z-index: 3;
}

.poem-1{
  position: absolute;
  left: 30%;
  top: 0%;
}
.poem-2{
  position: absolute;
  top: 8%;
  left: 50%;
}

.poem-1 p,.poem-2 p{
  font-size:34px;
  font-weight: bold;
  position: relative; 
}

/* 字体显示动画 */
@keyframes appear {
  0%{opacity: 0;}
  100%{opacity: 1;}
}

/* 波浪动画 */
@-webkit-keyframes wave {
  0% {  height: 100%;  }
  50% {  height: 120%;  }
  100%{   height: 100%;  }
}

#water {
  position: absolute;
  bottom:0;
  width: 100%;
  height: 150px;
  margin-top: 100px;
}

#water .wave {
  position: absolute;
  bottom: 0;
  height: 100%;
  animation: wave 2s infinite ease-in-out;
}

#water .wave {
  /* 波浪颜色渐变 */
  background: -webkit-gradient(linear, left bottom, left top, color-stop(0, rgb(3 23 63)), color-stop(1, rgb(12 80 127)));
}