HTML5+CSS3 Loading progress bar and download progress bar implementation

This time to bring you HTML5+CSS3 loading progress bar and download progress bar implementation, HTML5+CSS3 loading progress bar and download progress bar implementation of the considerations are what, the following is the actual case, together to see.

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1. HTML Structure:

<p id= "LoadBar01" class= "Loadbar" >         <p>              <span class= "percent" >                 <i></i>              </span>         </p>         <span class= "Percentnum" >0%</span>     </p>

Under Simple analysis:

P.loadbar represents the entire progress bar

P.loadbar p Sets the Fillet table box, P.loadbar p span as the progress (dynamic change width), P.loadbar p span I fills the background color for progress (that is, width=100%)

HTML structure, we can design their own, as long as reasonable, there is no problem ~

2. CSS:

Body {font-family:thoma, Microsoft Yahei, ' Lato ', Calibri, Arial, Sans-serif;             } #content {margin:120px auto;         width:80%;             }. loadbar {width:600px;             height:30px;             BORDER:3PX solid #212121;             border-radius:20px;         position:relative;             }. Loadbar p {width:100%;             height:100%;             Position:absolute;             top:0;         left:0;             }. Loadbar p span,. Loadbar p I {box-shadow:inset 0-2px 6px rgba (0, 0, 0,. 4);             width:0%;             Display:block;             height:100%;             Position:absolute;             top:0;             left:0;         border-radius:20px;             }. Loadbar p i {width:100%;             -webkit-animation:move. 8s linear infinite; backgRound:-webkit-linear-gradient (left Top, #7ed047 0, #7ed047 25%, #4ea018 25%, #4ea018 50%, #7ed047 50%, #7ed047 75%, #4ea             018 75%, #4ea018 100%);         background-size:40px 40px;             }. Loadbar. percentnum {position:absolute;             top:100%;             right:10%;             PADDING:1PX 15px;             border-bottom-left-radius:16px;             border-bottom-right-radius:16px;             border:1px solid #222;             Background-color: #222;           Color: #fff;             } @-webkit-keyframes Move {0% {background-position:0 0;             } 100% {background-position:40px 0; }         }

At this point the effect is:

The overall layout is the use of position relative and absolute~

The more difficult part is the implementation of the gradient bar:

We use

A, gradient from top left to bottom right

b, the color is: 0-25% for #7ed047, 25%-50% for #4ea018, 50%-75% for #7ed047, 75%-100% for #4ea018

C, the size of the background is 40px 40px This setting exceeds the height of the line, the larger the width of the provisions wider

Analysis Diagram:

The principle of setting is that, while the background width can be set larger, the width of the article is larger;

3, Set JS, create Loadbar Object

function Loadingbar (id) {This.loadbar = $ ("#" + ID);             This.percentele = $ (". Percent", this.loadbar);             This.percentnumele = $ (". Percentnum", This.loadbar);             This.max = 100;         this.currentprogress = 0;             } Loadingbar.prototype = {Constructor:loadingbar, setmax:function (maxval)             {This.max = Maxval;                     }, Setprogress:function (val) {if (Val >= this.max) {                 val = This.max;                 } this.currentprogress = parseint ((val/this.max) * 100) + "%";                 This.percentEle.width (this.currentprogress);                 This.percentNumEle.text (this.currentprogress); }         };

We created a Loadbar object, and exposed two methods, one setting the maximum progress, one setting the current progress, such as the download file maximum progress is the file size, the current progress is the downloaded file size.

4. Testing

Finally we test our code:

$ (function ()       {             var loadbar = new Loadingbar ("LoadBar01");           var max = +;           Loadbar.setmax (max);           var i = 0;           var time = setinterval (function ()           {               loadbar.setprogress (i);               if (i = = max)               {                   clearinterval (time);                   return;               }               i + = ten;           }, +);       });

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