Web Front-endH5 TutorialDetailed introduction of HTML5+CSS3 to realize drag-and-drop upload of images without plug-in (supports preview and batch)
This article mainly introduces HTML5+CSS3 to implement plug-in drag and dropUploading images (supports preview and batch), now html5 provides API and File, FileReader, XMLHttpRequest and other powerful APIs provide the possibility for us to drag and drop to upload. Those who are interested can find out.
Uploading is basically something that often occurs in projects, generally using:
1, formsubmission
2, flash
3, HTML5
form submission will refresh the page, making it difficult to upload asynchronously; flash may be used more because it can take into account almost all For browsers, I have always used jQuery's uploadify as the upload tool in the project. Uploadify is also based on Html5 and seems to be charged. You can go to the official website to take a look; of course , now html5 provides API and powerful APIs such as File, FileReader, XMLHttpRequest, etc., making it possible for us to drag and drop uploads.
Rendering 1:
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8"/>
<link href="reset.css" type="text/css" rel="stylesheet"/>
<link href="01.css" type="text/css" rel="stylesheet"/>
</head>
<body>
<p id="uploadBox">
<ul>
<li>
<img src="/static/imghwm/default1.png" data-src="images/pic1.jpg" class="lazy" / alt="Detailed introduction of HTML5+CSS3 to realize drag-and-drop upload of images without plug-in (supports preview and batch)" >
<span class="progress"></span>
<span class="percentage"></span>
</li>
<li>
<img src="/static/imghwm/default1.png" data-src="images/pic2.jpg" class="lazy" / alt="Detailed introduction of HTML5+CSS3 to realize drag-and-drop upload of images without plug-in (supports preview and batch)" >
<span class="progress"></span>
<span class="percentage">12%</span>
</li>
<li class="done">
<img src="/static/imghwm/default1.png" data-src="images/pic2.jpg" class="lazy" / alt="Detailed introduction of HTML5+CSS3 to realize drag-and-drop upload of images without plug-in (supports preview and batch)" >
<span class="progress"></span>
<span class="percentage"></span>
</li>
<p class="clearfix"></p>
</ul>
</p>
</body>
</html>It’s still very simple: a, a p#uploadBox, in which ul li represents each uploaded image unitb, li img imagec, li span. progress is used to display progress, with the effect of rising water, from height:0% -100%;
d, li span.percentage is used to display 1% to 100 in the center of the picture % number, when it reaches 100%, display a correct picture CSS:body
{
background: #eee;
}
#uploadBox
{
width: 622px;
height: 362px;
background-color: #fff;
border: 1px solid #777;
margin: 120px auto;
}
#uploadBox ul li
{
float: left;
position: relative;
margin-left: 5px;
margin-top: 5px;
}
#uploadBox li img
{
border: 1px solid #D1D1D1;
width: 198px;
height: 112px;
vertical-align: middle;
}
#uploadBox li .percentage
{
width: 69px;
height: 69px;
position: absolute;
left: 50%;
top: 50%;
margin-left: -34.5px;
margin-top: -34.5px;
text-align: center;
font-size: 18px;
line-height: 69px;
color: #fff;
border-radius: 34.5px;
background: rgba(0, 0, 0, .8);
}
#uploadBox li.done .percentage
{
background: url("images/done.png") no-repeat 0 0;
text-indent: -1000em;
}
#uploadBox li .progress
{
position: absolute;
height: 22.4px;
bottom: 0px;
width: 200px;
background: #000;
opacity: .5;
}
.clearfix
{
clear: both;
} are relatively simple, basically a simple use of positioning ~Please take a look for yourself~Final rendering:
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