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This time I will bring you the implementation of HTML5+CSS3 loading progress bar and download progress bar. What are the precautions for the implementation of HTML5+CSS3 loading progress bar and download progress bar. The following is a practical case. Get up and take a look.
Rendering:
1. HTML structure:
<p id="loadBar01" class="loadBar"> <p> <span class="percent"> <i></i> </span> </p> <span class="percentNum">0%</span> </p>
Simple analysis:
p.loadBar represents the entire progress bar
p.loadBar p sets the rounded table frame, p.loadBar p span is the progress (dynamically changing the width), p.loadBar p span i is the progress filled background color (i.e. width=100%)
You can design the structure of HTML by yourself. As long as it is reasonable, there will be 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%, #4ea018 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; } }
The effect at this time is:
The overall layout is to use position relative and absolute~
The more difficult part is the implementation of the gradient bar:
We use
a, gradient from upper left to lower right
b, and the colors are: 0-25% is #7ed047, 25%-50% is #4ea018, 50%-75% is #7ed047, 75%-100% is #4ea018
c, and the size of the background is 40px. 40px only needs to exceed the height. The larger the setting, the wider the width of the article.
Analysis chart:
The setting principle is as shown above. At the same time, the larger the background width can be set, the larger the article width will be;
3. Set up Js and create a 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 to set the maximum progress and the other to set the current progress; for example, the maximum progress of downloading a file is the file size, and the current The progress is the downloaded file size.
4. Test
Finally we test our code:
$(function () { var loadbar = new LoadingBar("loadBar01"); var max = 1000; loadbar.setMax(max); var i = 0; var time = setInterval(function () { loadbar.setProgress(i); if (i == max) { clearInterval(time); return; } i += 10; }, 40); });
I believe you have mastered the method after reading the case in this article, more exciting Please pay attention to other related articles on php Chinese website!
Recommended reading:
Detailed explanation of dynamic loading of css
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