小編給大家分享一下如何使用html5制作loading圖，相信大部分人都還不怎么了解，因此分享這篇文章給大家參考一下，希望大家閱讀完這篇文章后大有收獲，下面讓我們一起去了解一下吧！
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代碼如下：
<！DOCTYPE html>
</ title></p><p></ head></p><p><body></p><p><canvas id =“ canvas”> </ canvas> </ p> <p> <script></p><p>var Loading =功能（畫布，選項）{</p><p>this.canvas = document.getElementById（canvas）;</p><p>this.options =選項;</p><p>}; </ p> <p> Loading.prototype = {</p><p>構(gòu)造函數(shù)：正在加載，</p><p>顯示：function（）{</p><p>var canvas = this.canvas，</p><p>begin = this.options.begin，</p><p>old = this.options.old，</p><p>lineWidth = this .options.lineWidth，</p><p>canvasCenter = {x：canvas.width / 2，y：canvas.height / 2}，</p><p>ctx = canvas.getContext（“ 2d”），</p><p>color = this.options.color，</p><p>num = this.options.num，</p><p>angle = 0 ，</p><p>lineCap = this.options.lineCap，</p><p>CONST_PI = Math.PI *（360 / num）/ 180;</p><p>window.timer = setInterval（function（）{</p><p>ctx.clearRect（0，0，canvas.width，canvas.height）;</p><p>for（var i = 0; i <num; i + = 1）{</p><p>ctx.beginPath（）;</p><p>ctx.strokeStyle = color [num-1-i];</p><p>ctx.lineWidth = lineWidth;</p><p>ctx.lineCap = lineCap;</p><p>ctx.moveTo（canvasCenter.x + Math.cos（CONST_PI * i +角度）*開始，canvasCenter.y + Math.sin（CONST_PI * i +角度）*開始）;</p><p>ctx.lineTo（canvasCenter.x + Math.cos（CONST_PI * i + angle）*舊，canvasCenter.y + Math.sin（CONST_PI * i + angle）* old）;</p><p>ctx.stroke（）;</p><p>ctx.closePath（）;</p><p>}</p><p>angle + = CONST_PI;</p><p>console.log（angle）</p><p>}，50）;</p><p>}，</p><p>hide：function（）{</p><p>clearInterval（window.timer）;</p><p>}</p><p>}; </ p> <p>（函數(shù)（）{</p><p>var options = {</p><p>num：8，</p><p>begin：20，</p><p>old：40，</p><p>lineWidth：10，</p><p>lineCap：“ round”，</p><p>顏色：[“ rgb（0，0，0）”，“ rgb（20，20，20 ）” ，“ rgb（40、40、40）”，“ rgb（60、60、60）”，“ rgb（80、80、80）”，“ rgb（100、100、100）”，“ rgb（120， 120，120）“，” rgb（140，140，140）“]</p><p>};</p><p>var loading = new Loading（“ canvas”，options）;</p><p>loading.show（）;</p><p>}（））;</p><p></ script></p><p></ body></p><p></ html></p><p>以上是“如何使用html5制作loading圖”這篇文章的所有內(nèi)容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內(nèi)容對大家有所幫助，如果還想學習更多知識，歡迎關注創(chuàng)新互聯(lián)行業(yè)資訊頻道！</p>
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