HTML5网页Loading加载效果

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引入JS
- 3.0.0 2.2.0 2.1.4 2.1.3 2.1.2 2.1.1 2.1.0 2.0.3 2.0.2 2.0.1 2.0.0 1.12.0 1.11.3 1.11.2 1.11.1 1.11.0 1.10.2 1.10.1 1.10.0 1.9.1 1.9.0 1.8.3 1.8.2 1.8.1 1.8.0 1.7.2 1.7.1 1.7 1.6.4 1.6.2 1.6.1 1.4.4 1.4.3 1.4.2 1.4.1 1.4.0
- 1.7.3 1.7.2 1.7.1.0 1.7.0.0
- 2.0.0-beta.0 2.0.0-alpha.55 1.5.0-rc.0 1.4.8 1.4.0 1.3.20 1.2.29 1.1.5 1.0.8
- 1.8.3 1.7.0 1.6.0 1.5.2 1.4.4 1.3.3 1.2.4 1.1.7
- 1.10.4 1.9.7 1.8.10 1.7.8 1.6.3 1.5.4 1.4.6 1.3.3
- core1.6.0 core-compat1.6.0 core1.5.2 core-compat1.5.2 core-full-compat-yc1.4.5 core-full-compat1.4.5 core-full-nocompat-yc1.4.5 core-full-nocompat1.4.5
- 1.4.2 1.4.1 1.4.0 1.3.0 1.2.0 1.1.0
- 3.7.3 3.7.2 3.7.1 3.7.0 3.7 3.6.2 3.6.1 3.6

引入框架
- 1.4.5 1.4.4 1.4.3 1.4.2 1.4.1 1.4.0 1.3.2
- 1.11.4 1.11.3 1.11.2 1.11.1 1.11.0 1.10.4 1.10.3 1.10.2
- 3.3.6 3.3.5 3.3.0 3.2.0 2.3.2

汉王

HTML代码

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<!doctype html>  
    <html>  
      <head>  
        <meta http-equiv="content-type" content="GBK"/>  
        <title>HTML5-loading</title>  
        <script type="text/javascript">  
        function loading(canvas,options){   
          this.canvas = canvas;   
          if(options){   
            this.radius = options.radius||12;   
            this.circleLineWidth = options.circleLineWidth||4;   
            this.circleColor = options.circleColor||'lightgray';   
            this.dotColor = options.dotColor||'gray';   
          }else{         
            this.radius = 12;   
            this.circelLineWidth = 4;   
            this.circleColor = 'lightgray';   
            this.dotColor = 'gray';   
          }   
        }   
        loading.prototype = {   
          show:function (){   
            var canvas = this.canvas;   
            if(!canvas.getContext)return;   
            if(canvas.__loading)return;   
            canvas.__loading = this;   
            var ctx = canvas.getContext('2d');   
            var radius = this.radius;         
            var rotators = [{angle:0,radius:1.5},{angle:3/radius,radius:2},{angle:7/radius,radius:2.5},{angle:12/radius,radius:3}];         
            var me = this;   
            canvas.loadingInterval = setInterval(function(){   
              ctx.clearRect(0,0,canvas.width,canvas.height);            
              var lineWidth = me.circleLineWidth;   
              var center = {x:canvas.width/2 - radius,y:canvas.height/2-radius};             
              ctx.beginPath();   
              ctx.lineWidth = lineWidth;   
              ctx.strokeStyle = me.circleColor;   
              ctx.arc(center.x,center.y,radius,0,Math.PI*2);   
              ctx.closePath();   
              ctx.stroke();   
              for(var i=0;i<rotators.length;i++){           
                var rotatorAngle = rotators[i].currentAngle||rotators[i].angle;               
                //在圆圈上面画小圆   
       var rotatorCenter = {x:center.x-(radius)*Math.cos(rotatorAngle) ,y:center.y-(radius)*Math.sin(rotatorAngle)};               
                var rotatorRadius = rotators[i].radius;   
                ctx.beginPath();   
                ctx.fillStyle = me.dotColor;   
                ctx.arc(rotatorCenter.x,rotatorCenter.y,rotatorRadius,0,Math.PI*2);   
                ctx.closePath();   
                ctx.fill();   
                rotators[i].currentAngle = rotatorAngle+4/radius;   
              }   
            },50);   
          },   
          hide:function(){   
            var canvas = this.canvas;   
            canvas.__loading = false;   
            if(canvas.loadingInterval){   
              window.clearInterval(canvas.loadingInterval);   
            }   
            var ctx = canvas.getContext('2d');   
            if(ctx)ctx.clearRect(0,0,canvas.width,canvas.height);   
          }   
        };   
        </script>  
      </head>  
      <body>  
        <canvas id="canvas" width="300" height="100" style="border:1px solid #69c"></canvas>  
        <p>  
        <input type="button" onclick="loadingObj.hide()" value="HideLoading"/>  
        <input type="button" onclick="loadingObj.show()" value="showLoading"/>  
        </p>  
        <script>  
        var loadingObj = new loading(document.getElementById('canvas'),{radius:8,circleLineWidth:3});   
        loadingObj.show();   
        </script>  
      </body>  
    </html>

CSS代码

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JS代码

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名称

HTML5网页Loading加载效果

分类

CSS3

描述

HTML5制作Loading加载效果，预览可以show and stop，制作一个Loading动画，未使用任何第三方素材，纯HTML和CSS3实现。