一些好玩的东东

Interesting codes in console

使用方法：按 F12 并进入控制台，将下面的代码直接复制粘贴到控制台中，回车即可生成特效。

• Bo Bo Ball「单击特效」

  function clickEffect() {
      let balls = [];
      let longPressed = false;
      let longPress;
      let multiplier = 0;
      let width, height;
      let origin;
      let normal;
      let ctx;
      const colours = ["#F73859", "#14FFEC", "#00E0FF", "#FF99FE", "#FAF15D"];
      const canvas = document.createElement("canvas");
      document.body.appendChild(canvas);
      canvas.setAttribute("style", "width: 100%; height: 100%; top: 0; left: 0; z-index: 99999; position: fixed; pointer-events: none;");
      const pointer = document.createElement("span");
      pointer.classList.add("pointer");
      document.body.appendChild(pointer);
      if (canvas.getContext && window.addEventListener) {
          ctx = canvas.getContext("2d");
          updateSize();
          window.addEventListener('resize', updateSize, false);
          loop();
          window.addEventListener("mousedown", function (e) {
              pushBalls(randBetween(10, 20), e.clientX, e.clientY);
              document.body.classList.add("is-pressed");
              longPress = setTimeout(function () {
                  document.body.classList.add("is-longpress");
                  longPressed = true;
              }, 500);
          }, false);
          window.addEventListener("mouseup", function (e) {
              clearInterval(longPress);
              if (longPressed == true) {
                  document.body.classList.remove("is-longpress");
                  pushBalls(randBetween(50 + Math.ceil(multiplier), 100 + Math.ceil(multiplier)), e.clientX, e.clientY);
                  longPressed = false;
              }
              document.body.classList.remove("is-pressed");
          }, false);
          window.addEventListener("mousemove", function (e) {
              let x = e.clientX;
              let y = e.clientY;
              pointer.style.top = y + "px";
              pointer.style.left = x + "px";
          }, false);
      } else {
          console.log("canvas or addEventListener is unsupported!");
      }
  
      function updateSize() {
          canvas.width = window.innerWidth * 2;
          canvas.height = window.innerHeight * 2;
          canvas.style.width = window.innerWidth + 'px';
          canvas.style.height = window.innerHeight + 'px';
          ctx.scale(2, 2);
          width = (canvas.width = window.innerWidth);
          height = (canvas.height = window.innerHeight);
          origin = {x: width / 2, y: height / 2};
          normal = {x: width / 2, y: height / 2};
      }
  
      class Ball {
          constructor(x = origin.x, y = origin.y) {
              this.x = x;
              this.y = y;
              this.angle = Math.PI * 2 * Math.random();
              if (longPressed == true) {
                  this.multiplier = randBetween(14 + multiplier, 15 + multiplier);
              } else {
                  this.multiplier = randBetween(6, 12);
              }
              this.vx = (this.multiplier + Math.random() * 0.5) * Math.cos(this.angle);
              this.vy = (this.multiplier + Math.random() * 0.5) * Math.sin(this.angle);
              this.r = randBetween(8, 12) + 3 * Math.random();
              this.color = colours[Math.floor(Math.random() * colours.length)];
          }
  
          update() {
              this.x += this.vx - normal.x;
              this.y += this.vy - normal.y;
              normal.x = -2 / window.innerWidth * Math.sin(this.angle);
              normal.y = -2 / window.innerHeight * Math.cos(this.angle);
              this.r -= 0.3;
              this.vx *= 0.9;
              this.vy *= 0.9;
          }
      }
  
      function pushBalls(count = 1, x = origin.x, y = origin.y) {
          for (let i = 0; i < count; i++) {
              balls.push(new Ball(x, y));
          }
      }
  
      function randBetween(min, max) {
          return Math.floor(Math.random() * max) + min;
      }
  
      function loop() {
          ctx.fillStyle = "rgba(255, 255, 255, 0)";
          ctx.clearRect(0, 0, canvas.width, canvas.height);
          for (let i = 0; i < balls.length; i++) {
              let b = balls[i];
              if (b.r < 0) continue;
              ctx.fillStyle = b.color;
              ctx.beginPath();
              ctx.arc(b.x, b.y, b.r, 0, Math.PI * 2, false);
              ctx.fill();
              b.update();
          }
          if (longPressed == true) {
              multiplier += 0.2;
          } else if (!longPressed && multiplier >= 0) {
              multiplier -= 0.4;
          }
          removeBall();
          requestAnimationFrame(loop);
      }
  
      function removeBall() {
          for (let i = 0; i < balls.length; i++) {
              let b = balls[i];
              if (b.x + b.r < 0 || b.x - b.r > width || b.y + b.r < 0 || b.y - b.r > height || b.r < 0) {
                  balls.splice(i, 1);
              }
          }
      }
  }
  
  clickEffect();
  

• Click&Heart「单击特效」

  (function(window,document,undefined){
          var hearts = [];
          window.requestAnimationFrame = (function(){
                  return window.requestAnimationFrame || 
                             window.webkitRequestAnimationFrame ||
                             window.mozRequestAnimationFrame ||
                             window.oRequestAnimationFrame ||
                             window.msRequestAnimationFrame ||
                             function (callback){
                                     setTimeout(callback,1000/60);
                             }
          })();
          init();
          function init(){
                  css(".heart{width: 10px;height: 10px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: '';width: inherit;height: inherit;background: inherit;border-radius: 50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -5px;}.heart:before{left: -5px;}");
                  attachEvent();
                  gameloop();
          }
          function gameloop(){
                  for(var i=0;i<hearts.length;i++){
                      if(hearts[i].alpha <=0){
                              document.body.removeChild(hearts[i].el);
                              hearts.splice(i,1);
                              continue;
                      }
                      hearts[i].y--;
                      hearts[i].scale += 0.004;
                      hearts[i].alpha -= 0.013;
                      hearts[i].el.style.cssText = "left:"+hearts[i].x+"px;top:"+hearts[i].y+"px;opacity:"+hearts[i].alpha+";transform:scale("+hearts[i].scale+","+hearts[i].scale+") rotate(45deg);background:"+hearts[i].color;
              }
              requestAnimationFrame(gameloop);
          }
          function attachEvent(){
                  var old = typeof window.onclick==="function" && window.onclick;
                  window.onclick = function(event){
                          old && old();
                          createHeart(event);
                  }
          }
          function createHeart(event){
              var d = document.createElement("div");
              d.className = "heart";
              hearts.push({
                      el : d,
                      x : event.clientX - 5,
                      y : event.clientY - 5,
                      scale : 1,
                      alpha : 1,
                      color : randomColor()
              });
              document.body.appendChild(d);
      }
      function css(css){
              var style = document.createElement("style");
                  style.type="text/css";
                  try{
                      style.appendChild(document.createTextNode(css));
                  }catch(ex){
                      style.styleSheet.cssText = css;
                  }
                  document.getElementsByTagName('head')[0].appendChild(style);
      }
          function randomColor(){
                  return "rgb("+(~~(Math.random()*255))+","+(~~(Math.random()*255))+","+(~~(Math.random()*255))+")";
          }
  })(window,document);
  

• Attractable Lines「光标特效」

  !function(){
  function n(n,e,t){
  return n.getAttribute(e)||t
  }
   
  function e(n){
  return document.getElementsByTagName(n)
  }
   
  function t(){
  var t=e("script"),o=t.length,i=t[o-1];
   
  return{
  l:o,z:n(i,"zIndex",-1),o:n(i,"opacity",3),c:n(i,"color","0,0,0"),n:n(i,"count",160)
  }
  }
   
  function o(){
  a=m.width=window.innerWidth||document.documentElement.clientWidth||document.body.clientWidth,
  c=m.height=window.innerHeight||document.documentElement.clientHeight||document.body.clientHeight
  }
   
  function i(){
  r.clearRect(0,0,a,c);
  var n,e,t,o,m,l;
   
  s.forEach(function(i,x){
  for(i.x+=i.xa,i.y+=i.ya,i.xa*=i.x>a||i.x<0?-1:1,i.ya*=i.y>c||i.y<0?-1:1,r.fillRect(i.x-.5,i.y-.5,1,1),e=x+1;e<u.length;e++)n=u[e],
  null!==n.x&&null!==n.y&&(o=i.x-n.x,m=i.y-n.y,
  l=o*o+m*m,l<n.max&&(n===y&&l>=n.max/2&&(i.x-=.03*o,i.y-=.03*m),
  t=(n.max-l)/n.max,r.beginPath(),r.lineWidth=t/2,r.strokeStyle="rgba("+d.c+","+(t+.2)+")",r.moveTo(i.x,i.y),r.lineTo(n.x,n.y),r.stroke()))
  }),
  x(i)
  }
  var a,c,u,m=document.createElement("canvas"),
  d=t(),l="c_n"+d.l,r=m.getContext("2d"),
  x=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||
   
  function(n){
  window.setTimeout(n,1e3/45)
  },
   
  w=Math.random,y={x:null,y:null,max:2e4};m.id=l,m.style.cssText="position:fixed;top:0;left:0;z-index:"+d.z+";opacity:"+d.o,e("body")[0].appendChild(m),o(),window.onresize=o,
  window.onmousemove=function(n){
  n=n||window.event,y.x=n.clientX,y.y=n.clientY
  },
   
  window.onmouseout=function(){
  y.x=null,y.y=null
  };
  for(var s=[],f=0;d.n>f;f++){
  var h=w()*a,g=w()*c,v=2*w()-1,p=2*w()-1;s.push({x:h,y:g,xa:v,ya:p,max:6e3})
  }
  u=s.concat([y]),
  setTimeout(function(){i()},100)
  }();
  

• Copyright Protector「复制粘贴特效」

  var selfLogin = false;
      var follow = $('#profile_block').find('#p_b_follow');
      var block = follow.length >= 1 ? follow[0] : "";
      var followText = (block != null && block != undefined) ? block.innerHTML : "";
      if(followText == "") selfLogin = true;
   
      var pageInfo =  'Balabalabalabala\r\n'
          + '就不让你好好复制嘿嘿嘿'; 
      document.addEventListener('copy', function (ev) {
          var targetHTML = $.trim($(ev.target).html());
          if (targetHTML == "") return;
          if (!(targetHTML.startsWith('<table class="hljs-ln"') && targetHTML.endsWith('</table>')) || !selfLogin)  // isLogined
          {
              var selected = window.getSelection();
              var selectedText = selected.toString();  
              let copyRightStr = (selectedText + pageInfo).replace(/\n/g, '\r\n'); // Solve the line breaks conversion issue
   
              ev.clipboardData.setData('text/plain', `${copyRightStr}`);
              ev.preventDefault();
          }
      });
  

• Snowball Falling「背景特效」

  /* 控制下雪 */
  function snowFall(snow) {
      /* 可配置属性 */
      snow = snow || {};
      this.maxFlake = snow.maxFlake || 200;   /* 最多片数 */
      this.flakeSize = snow.flakeSize || 10;  /* 雪花形状 */
      this.fallSpeed = snow.fallSpeed || 1;   /* 坠落速度 */
  }
  /* 兼容写法 */
  requestAnimationFrame = window.requestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.webkitRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      window.oRequestAnimationFrame ||
      function(callback) { setTimeout(callback, 1000 / 60); };
  
  cancelAnimationFrame = window.cancelAnimationFrame ||
      window.mozCancelAnimationFrame ||
      window.webkitCancelAnimationFrame ||
      window.msCancelAnimationFrame ||
      window.oCancelAnimationFrame;
  /* 开始下雪 */
  snowFall.prototype.start = function(){
      /* 创建画布 */
      snowCanvas.apply(this);
      /* 创建雪花形状 */
      createFlakes.apply(this);
      /* 画雪 */
      drawSnow.apply(this)
  }
  /* 创建画布 */
  function snowCanvas() {
      /* 添加Dom结点 */
      var snowcanvas = document.createElement("canvas");
      snowcanvas.id = "snowfall";
      snowcanvas.width = window.innerWidth;
      snowcanvas.height = document.body.clientHeight;
      snowcanvas.setAttribute("style", "position:absolute; top: 0; left: 0; z-index: 1; pointer-events: none;");
      document.getElementsByTagName("body")[0].appendChild(snowcanvas);
      this.canvas = snowcanvas;
      this.ctx = snowcanvas.getContext("2d");
      /* 窗口大小改变的处理 */
      window.onresize = function() {
          snowcanvas.width = window.innerWidth;
          /* snowcanvas.height = window.innerHeight */
      }
  }
  /* 雪运动对象 */
  function flakeMove(canvasWidth, canvasHeight, flakeSize, fallSpeed) {
      this.x = Math.floor(Math.random() * canvasWidth);   /* x坐标 */
      this.y = Math.floor(Math.random() * canvasHeight);  /* y坐标 */
      this.size = Math.random() * flakeSize + 2;          /* 形状 */
      this.maxSize = flakeSize;                           /* 最大形状 */
      this.speed = Math.random() * 1 + fallSpeed;         /* 坠落速度 */
      this.fallSpeed = fallSpeed;                         /* 坠落速度 */
      this.velY = this.speed;                             /* Y方向速度 */
      this.velX = 0;                                      /* X方向速度 */
      this.stepSize = Math.random() / 30;                 /* 步长 */
      this.step = 0                                       /* 步数 */
  }
  flakeMove.prototype.update = function() {
      var x = this.x,
          y = this.y;
      /* 左右摆动(余弦) */
      this.velX *= 0.98;
      if (this.velY <= this.speed) {
          this.velY = this.speed
      }
      this.velX += Math.cos(this.step += .05) * this.stepSize;
  
      this.y += this.velY;
      this.x += this.velX;
      /* 飞出边界的处理 */
      if (this.x >= canvas.width || this.x <= 0 || this.y >= canvas.height || this.y <= 0) {
          this.reset(canvas.width, canvas.height)
      }
  };
  /* 飞出边界-放置最顶端继续坠落 */
  flakeMove.prototype.reset = function(width, height) {
      this.x = Math.floor(Math.random() * width);
      this.y = 0;
      this.size = Math.random() * this.maxSize + 2;
      this.speed = Math.random() * 1 + this.fallSpeed;
      this.velY = this.speed;
      this.velX = 0;
  };
  // 渲染雪花-随机形状（此处可修改雪花颜色！！！）
  flakeMove.prototype.render = function(ctx) {
      var snowFlake = ctx.createRadialGradient(this.x, this.y, 0, this.x, this.y, this.size);
      snowFlake.addColorStop(0, "rgba(255, 255, 255, 0.9)");  /* 此处是雪花颜色，默认是白色 */
      snowFlake.addColorStop(.5, "rgba(255, 255, 255, 0.5)"); /* 若要改为其他颜色，请自行查 */
      snowFlake.addColorStop(1, "rgba(255, 255, 255, 0)");    /* 找16进制的RGB 颜色代码。 */
      ctx.save();
      ctx.fillStyle = snowFlake;
      ctx.beginPath();
      ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2);
      ctx.fill();
      ctx.restore();
  };
  /* 创建雪花-定义形状 */
  function createFlakes() {
      var maxFlake = this.maxFlake,
          flakes = this.flakes = [],
          canvas = this.canvas;
      for (var i = 0; i < maxFlake; i++) {
          flakes.push(new flakeMove(canvas.width, canvas.height, this.flakeSize, this.fallSpeed))
      }
  }
  /* 画雪 */
  function drawSnow() {
      var maxFlake = this.maxFlake,
          flakes = this.flakes;
      ctx = this.ctx, canvas = this.canvas, that = this;
      /* 清空雪花 */
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      for (var e = 0; e < maxFlake; e++) {
          flakes[e].update();
          flakes[e].render(ctx);
      }
      /*  一帧一帧的画 */
      this.loop = requestAnimationFrame(function() {
          drawSnow.apply(that);
      });
  }
  /* 调用及控制方法 */
  var snow = new snowFall({maxFlake:60});
  snow.start();