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@eightHundreds
Last active November 13, 2016 02:35
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<!DOCTYPE HTML>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<title>利用 clipboardData 在网页中实现截屏粘贴的功能</title>
<style type="text/css">
#box {
width: 200px;
height: 200px;
border: 1px solid #ddd;
}
</style>
</head>
<body>
<h1>利用 clipboardData 在网页中实现截屏粘贴的功能</h1>
<hr />
<textarea rows="15" style="width: 100%;" id="base64Code"></textarea>
<br />
<img id="previewimg" />
<script type="text/javascript">
(function() {
var imgReader = function(item) {
var blob = item.getAsFile(),
reader = new FileReader();
var src;
// readAsDataURL完成后将其显示在网页中
reader.onload = function(e) {
var preImg=document.getElementById('previewimg'),
textA=document.getElementById('base64Code');
preImg.src=e.target.result;
textA.innerText=e.target.result;
};
// 读取文件
var t = reader.readAsDataURL(blob);
};
document.addEventListener('paste', function(e) {
// 添加到事件对象中的访问系统剪贴板的接口
var clipboardData = e.clipboardData,
i = 0,
items, item, types;
if(clipboardData) {
items = clipboardData.items;
if(!items) {
return;
}
item = items[0];
// 保存在剪贴板中的数据类型
types = clipboardData.types || [];
for(; i < types.length; i++) {
if(types[i] === 'Files') {
item = items[i];
break;
}
}
// 判断是否为图片数据
if(item && item.kind === 'file' && item.type.match(/^image\//i)) {
imgReader(item);
}
}
});
})();
</script>
</body>
</html>
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