Today I bring you a cool progress bar. The progress bar gives users a better experience in time-consuming operations and will not make users feel like they are waiting blindly. For long-term waits without progress bars, users If the task freezes, close the application without hesitation; generally used for downloading tasks, deleting a large number of tasks, loading web pages, etc.; if you use HTML5 for mobile phone layout, it can also be used on mobile phones~
effect Picture:
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 with background color (i.e. width=100%)
HTML structure , everyone can design it by themselves, as long as it is 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%, #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. Colors are: 0-25% is #7ed047, 25%-50% is #4ea018, 50%-75% is # 7ed047, 75%-100% is #4ea018
c, the size of the background is 40px 40px. This setting can exceed the height. The larger the value, the wider the width of the article
Analysis chart:
The setting principle is as shown in the picture above. At the same time, the larger the background width can be set, the larger the text width will be;
3. Set 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 progress is the size of the downloaded file.
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); });
The above is the detailed content of Implementation of HTML5/CSS3 web page loading progress bar, download progress bar and other classic cases. For more information, please follow other related articles on the PHP Chinese website!