一个已封装好的漂亮进度条

日期：2020-06-13 栏目：程序人生浏览：次

<body>
<input type="button" value="start" onclick="processBar.changeMode();if(processBar.isMoving){this.value='Stop';}else{this.value='Start';}">

</body>
<script>
document.execCommand("BackgroundImageCache",false,true);

function ProcessBar(){
   this.width = 256;
   this.height = 18;
   this.top = 0;
   this.left = 0;
   this.backImg = "process_back.gif";
   this.foreImg = "process.gif";
   this.backDiv = document.createElement("div");
   this.foreDiv = document.createElement("div");
   this.fontDiv = document.createElement("div");

   this.isMoving = false;
   this.nowLength = 0;
   this.moveInterval = 100;
   this.moveRange = 1;
   this.timer;

   ProcessBar.nowObj = this;

   this.init = function(){
        this.foreDiv.style.backgroundImage = "url(" + this.foreImg + ")";
        this.foreDiv.style.backgroundRepeat = "no-repeat";
        this.foreDiv.style.position = "absolute";
        this.foreDiv.style.width = this.nowLength;
        this.foreDiv.style.height = this.height;
        this.foreDiv.style.top = 0;
        this.foreDiv.style.left = 0;

        this.fontDiv.style.background = "transparent";
        this.fontDiv.style.position = "absolute";
        this.fontDiv.style.width = this.width;
        this.fontDiv.style.height = this.height;
        this.fontDiv.style.top = 2;
        this.fontDiv.style.left = 0;
        this.fontDiv.style.textAlign = "center";
        this.fontDiv.style.fontSize = "13px";
        this.fontDiv.appendChild(document.createTextNode(" "));

        this.backDiv.style.backgroundImage = "url(" + this.backImg + ")";
        this.backDiv.style.backgroundRepeat = "no-repeat";
        this.backDiv.style.position = "absolute";
        this.backDiv.style.width = this.width;
        this.backDiv.style.height = this.height;
        this.backDiv.style.top = this.top;
        this.backDiv.style.left = this.left;

        this.backDiv.appendChild(this.foreDiv);
        this.backDiv.appendChild(this.fontDiv);

        document.body.appendChild(this.backDiv);
   }

   this.changeMode = function(){
        this.isMoving = !this.isMoving;

        if(this.isMoving){
            this.timer = window.setInterval(ProcessBar.nowObj.moving, this.moveInterval);
        }else{
            window.clearInterval(this.timer);
        }
   }

   this.moving = function(){
        ProcessBar.nowObj.nowLength += ProcessBar.nowObj.moveRange;
        ProcessBar.nowObj.foreDiv.style.width = ProcessBar.nowObj.nowLength;

        ProcessBar.nowObj.fontDiv.firstChild.data = Math.ceil((ProcessBar.nowObj.nowLength/ProcessBar.nowObj.width )*100) + "%";

        if(ProcessBar.nowObj.nowLength >= ProcessBar.nowObj.width ){
            window.clearInterval(ProcessBar.nowObj.timer);
            ProcessBar.nowObj.fontDiv.firstChild.data = "Complete!";
        }
   }


}

var processBar = new ProcessBar();
processBar.backImg = "https://www.jb51.net/upload/2007415102314868.gif"; processBar.foreImg = "https://www.jb51.net/upload/2007415102319734.gif"; processBar.top = 100;
processBar.left = 20;
processBar.init();
</script>

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一个已封装好的漂亮进度条

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