520 고백 코드의 JS 구현 사례 분석

이번에는 520 고백 코드의 JS 구현 사례 분석을 가져옵니다. 520 고백 코드의 JS 구현에 대한 주의 사항은 무엇입니까?

지난 이틀 동안 무슨 일이 있었는지 모르겠어요. 갑자기 오늘이 520이라는 걸 깨달았어요. 급하게 프로그램을 실행해서(초보라서 코드가 좀 지저분해요) 로 보냈어요. 모두가 함께 공부합니다 (Baidu 참조).

nbsp;html>

 
  <meta>
  <title>520</title>
  <style>
  html, body{padding:0px; margin:0px; background:#222; font-family: &#39;Karla&#39;, sans-serif; color:#FFF; height:100%; overflow:hidden;}
  canvas {width:100%; height:100%;}
  #text,#text_520{font-family:&#39;楷体&#39;; color:rgb(255,255,3); font-size:20px; position:fixed; left:10%; top:10%;}
  #text_520{font-size:100px; top:50%; left:50%;}
  img{position:fixed; top:0; left:0; width:100%;}
  #last{font-size:12px; bottom:10px; left:50%; position:fixed;}
  /*
  @keyframes drop {
   0% { 
    transform: translateY(-100px);
    opacity: 0;
   }
   90% {
    opacity: 1;
    transform:translateY(10px);
   }
   100% {
    transform:translateY(0px;)
   }
  }
  */
  </style>
 
 
  <canvas></canvas>
  <p></p>
  <p>5 2 0</p>
  <img  class="img lazy" src="/static/imghwm/default1.png" data-src="./timg.jpg" alt="520 고백 코드의 JS 구현 사례 분석" >
  <p>版权所有：李晓珂</p>
  <script></script>
  <script>
   function isIE(){
    var u = navigator.userAgent;
    if((u.indexOf("compatible") > -1 && u.indexOf("MSIE") > -1) || (u.indexOf("Trident") > -1 && u.indexOf("rv:11.0") > -1)){
     alert("该浏览器暂不支持，请更换浏览器");
     window.open(&#39;&#39;,&#39;_self&#39;); 
     window.close();
    }
    var audio = document.createElement("audio");
     audio.setAttribute("src","./520-love.mp3");
     audio.setAttribute("autoplay","autoplay");
   }
   isIE();
  </script>
  <script>
    var textArr = [
     &#39;I love three things in this world,&#39;,
     &#39;the sun ,the moon and you.&#39;,
     &#39;The sun for the day,&#39;,
     &#39;the moon for the night,&#39;,
     &#39;and you forever!&#39;,
     &#39;&#39;,
     &#39;If you were a teardrop,&#39;,
     &#39;in my eye,&#39;,
     &#39;for fear of losing you,&#39;,
     &#39;I would never cry.&#39;,
     &#39;And if the golden sun,&#39;,
     &#39;should cease to shine its light,&#39;,
     &#39;just one smile from you,&#39;,
     &#39;would make my whole world bright.&#39;
    ];
    var text_520 = document.getElementById(&#39;text_520&#39;);
    var height = (window.innerHeight - text_520.offsetHeight) / 2;
    var width = (window.innerWidth - text_520.offsetWidth) / 2;
    text_520.style.top = height + &#39;px&#39;;
    text_520.style.left = width + &#39;px&#39;;
    $(&#39;#text_520&#39;).hide();
    $(&#39;.img&#39;).hide();
    var m = 0;
    var n = 0;
    var text = document.getElementById(&#39;text&#39;);
    function typing(){
     if(m <= textArr[n].length) {
      text.innerHTML = text.innerHTML.substring(0,text.innerHTML.length-1) + textArr[n].substr(m++,1) + &#39;_&#39;;
      setTimeout(typing,250);
     }else {
      if(n < textArr.length-1){
       text.innerHTML = text.innerHTML.substring(0,text.innerHTML.length-1) + "<br />_";
       n++;
       m = 0;
       typing();
      }else {
       text.innerHTML = text.innerHTML.substring(0,text.innerHTML.length-1);
       $(&#39;#text&#39;).fadeOut(5000);
       setTimeout(function(){$(&#39;#text_520&#39;).fadeIn(5000);},7000);
       setTimeout(function(){$(&#39;#text_520&#39;).fadeOut(5000); },7000);
       setTimeout(function(){$(&#39;.img&#39;).fadeIn(50000);},15000)
      }
     }
    }
    setTimeout(typing,5000);
   var ctx = document.querySelector(&#39;canvas&#39;).getContext(&#39;2d&#39;);
    ctx.canvas.width = window.innerWidth;
    ctx.canvas.height = window.innerHeight;
   var sparks = [];
   var fireworks = [];
   var walker;
   fireworks.pop();
   var i = 10;
   while(i--) fireworks.push(new Firework(Math.random()*window.innerWidth, window.innerHeight*Math.random()));
   // setInterval(render, 1000/50);
   render();
   function render() {
    setTimeout(render, 1000/50);
    ctx.fillStyle = &#39;rgba(0, 0, 0, 0.2)&#39;;
    ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
    // 上升效果
    for(var firework of fireworks) {
     if(firework.dead) continue;
     firework.move();
     firework.draw();
    }
    // 绽放效果
    for(var spark of sparks) {
     if(spark.dead) continue;
     spark.move();
     spark.draw();
    }
    if(Math.random() < 0.1) fireworks.push(new Firework());
    //ctx.height = ctx.height;
   }
   function Spark(x, y, color) {
    this.x = x;
    this.y = y;
    this.dir = Math.random() * (Math.PI*2);
    this.dead = false;
    this.color = color;
    this.speed = Math.random() * 3 + 3;
    walker = new Walker({ radius: 20, speed: 0.25 });
    this.gravity = 0.25;
    this.dur = this.speed / 0.15;
    this.move = function() {
     this.dur--;
     if(this.dur < 0) this.dead = true;
     if(this.speed < 0) return;
     if(this.speed > 0) this.speed -= 0.15;
     walk = walker.step();
     this.x += Math.cos(this.dir + walk) * this.speed;
     this.y += Math.sin(this.dir + walk) * this.speed;
     this.y += this.gravity;
     this.gravity += 0.05;
    }
    this.draw = function() {
     drawCircle(this.x, this.y, 2, this.color);
    }
   }
   function Firework(x, y) {
    this.xmove = Math.random()*2 - 1;
    this.x = x || Math.random() * ctx.canvas.width;
    this.y = y || ctx.canvas.height;
    this.height = Math.random()*ctx.canvas.height/2;
    this.dead = false;
    this.color = randomColor();
    this.move = function() {
     this.x += this.xmove;
     if(this.y > this.height) this.y -= 4; 
     else this.burst();
    }
    this.draw = function() {
     drawCircle(this.x, this.y, 3, this.color)
    }
    this.burst = function() {
     this.dead = true
     i = 100; while(i--) sparks.push(new Spark(this.x, this.y, this.color));
     sparks.pop();
    }
   }
   setTimeout(function (){window.open(&#39;&#39;,&#39;_self&#39;).close();},175000);
/*
   // 清除两个数组
   function clear(){
    if(sparks!=null || fireworks!=null){
     sparks.pop();
     fireworks.pop();
    }
    var sparks = [];
    var fireworks = [];
   }
   setInterval(clear,100);
    */
   function drawCircle(x, y, radius, color) {
    color = color || &#39;#FFF&#39;;
    ctx.fillStyle = color;
    ctx.fillRect(x-radius/2, y-radius/2, radius, radius);
   }
   function randomColor(){
    return [&#39;#6ae5ab&#39;,&#39;#88e3b2&#39;,&#39;#36b89b&#39;,&#39;#7bd7ec&#39;,&#39;#66cbe1&#39;][Math.floor(Math.random() * 5)];
   }
   function Walker(options){
    this.step = function(){
     this.direction = Math.sign(this.target) * this.speed
     this.value += this.direction
     this.target
      ? this.target -= this.direction
      : (this.value)
      ? (this.wander) 
       ? this.target = this.newTarget() 
       : this.target = -this.value
      : this.target = this.newTarget() 
     return this.direction
    }
    this.newTarget = function() {
     return Math.round(Math.random()*(this.radius*2)-this.radius)
    }
    this.start = 0
    this.value = 0
    this.radius = options.radius
    this.target = this.newTarget()
    this.direction = Math.sign(this.target)
    this.wander = options.wander
    this.speed = options.speed || 1
   }
  </script>
 

이 기사의 사례를 읽으신 후 방법을 마스터하셨다고 생각합니다. 더 흥미로운 정보를 보려면 PHP 중국어 웹사이트의 다른 관련 기사를 주목하세요!

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위 내용은 520 고백 코드의 JS 구현 사례 분석의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!