首页 诗词 字典 板报 句子 名言 友答 励志 学校 网站地图
当前位置: 首页 > 教程频道 > 网站开发 > CSS >

html5 兑现加载loading.实例

2012-10-08 
html5 实现加载loading.......实例1.!DOCTYPE html 2.html langen xmlnshttp://www.w3.org/1999/x

html5 实现加载loading.......实例
1.<!DOCTYPE html>
2.<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
3.<head>
4.<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
5.<title>HTML5 Demo: canvas</title>
6.<style>
7.body {  
8.  font: normal 16px/20px Helvetica, sans-serif; 
9.  background: rgb(237, 237, 236); 
10.  margin: 0; 
11.  margin-top: 40px; 
12.  padding: 0; 
13.} 
14.
15.article, section, header, footer { 
16.  display: block; 
17.} 
18.
19.#wrapper { 
20.  width: 600px; 
21.  margin: 0 auto; 
22.  background: #fff url(images/shade.jpg) repeat-x center bottom; 
23.  -moz-border-radius: 10px; 
24.  -webkit-border-radius: 10px; 
25.  border-top: 1px solid #fff; 
26.  padding-bottom: 76px; 
27.} 
28.
29.h1 { 
30.  padding-top: 10px; 
31.} 
32.
33.h2 { 
34.  font-size: 100%; 
35.  font-style: italic; 
36.} 
37.
38.header, 
39.article > *, 
40.footer a, 
41.footer p { 
42.  margin: 20px; 
43.} 
44.
45.footer > * { 
46.  margin: 20px; 
47.  color: #999; 
48.} 
49.
50.article { 
51.  position: relative; 
52.} 
53.</style>
54.<script>
55.// For discussion and comments, see: http://remysharp.com/2009/01/07/html5-enabling-script/ 
56.(function(){if(!/*@cc_on!@*/0)return;var e = "abbr,article,aside,audio,bb,canvas,datagrid,datalist,details,dialog,eventsource,figure,footer,header,mark,menu,meter,nav,output,progress,section,time,video".split(','),i=e.length;while (i--){document.createElement(e[i])}})() 
57.</script>
58.</head>
59.<body>
60.<section id="wrapper">
61.    <header>
62.      <h1>Canvas</h1>
63.
64.    </header>
65.    <article></article>
66.    <footer><a href="/">HTML5 demo</a></footer>
67.</section>
68.<script src="h5utils.js"></script>
69.<script>
70.
71.buildSpinner({ x : 50, y : 50, size : 20, degrees : 30 }); 
72.
73.function buildSpinner(data) { 
74.   
75.  var canvas = document.createElement('canvas'); 
76.  canvas.height = 100; 
77.  canvas.width = 300; 
78.  document.getElementsByTagName('article')[0].appendChild(canvas); 
79.  var ctx = canvas.getContext("2d"), 
80.    i = 0, degrees = data.degrees, loops = 0, degreesList = []; 
81.     
82.  for (i = 0; i < degrees; i++) { 
83.    degreesList.push(i); 
84.  } 
85.   
86.  // reset 
87.  i = 0; 
88.   
89.  // so I can kill it later 
90.  window.canvasTimer = setInterval(draw, 1000/degrees);   
91.
92.  function reset() { 
93.    ctx.clearRect(0,0,100,100); // clear canvas 
94.     
95.    var left = degreesList.slice(0, 1); 
96.    var right = degreesList.slice(1, degreesList.length); 
97.    degreesList = right.concat(left); 
98.  } 
99.   
100.  function draw() { 
101.    var c, s, e; 
102.
103.    var d = 0; 
104.
105.    if (i == 0) { 
106.      reset(); 
107.    } 
108.
109.    ctx.save(); 
110.
111.    d = degreesList[i]; 
112.    c = Math.floor(255/degrees*i); 
113.    ctx.strokeStyle = 'rgb(' + c + ', ' + c + ', ' + c + ')'; 
114.    ctx.lineWidth = data.size; 
115.    ctx.beginPath(); 
116.    s = Math.floor(360/degrees*(d)); 
117.    e = Math.floor(360/degrees*(d+1)) - 1; 
118.
119.    ctx.arc(data.x, data.y, data.size, (Math.PI/180)*s, (Math.PI/180)*e, false); 
120.    ctx.stroke(); 
121.
122.    ctx.restore(); 
123.
124.    i++; 
125.    if (i >= degrees) { 
126.      i = 0; 
127.    } 
128.  }   
129.} 
130.
131.
132.</script>
133.<script>
134.var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); 
135.document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); 
136.</script>
137.<script>
138.try { 
139.var pageTracker = _gat._getTracker("UA-1656750-18"); 
140.pageTracker._trackPageview(); 
141.} catch(err) {}</script>
142.</body>
143.
144.</html>

热点排行