歌与帘与你的寄望
divide by zero
JavaScript拖拽文件作为背景图
烁灵
posted @ 2015年6月02日 23:50
in 前端
with tags
javascript
, 1152 阅读
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
DROP!!!!!!!!!!
<script type="text/javascript">
function chgImg(evt) {
var reader = evt.target;
console.log(reader.result);
var file = reader.file;
document.getElementsByTagName("body")[0].setAttribute("style","background-image:url(" + reader.result + ");");
}
document.ondragstart = function(e) {
e.preventDefault();
}
document.ondragover = function(e) {
e.dataTransfer.dragEffect = 'copy';
e.preventDefault();
}
document.ondrop = function(e){
var files = e.dataTransfer.files;
for(var i = 0, len = files.length; i < len; i++)
{
var f = files[i];
if (f.type.indexOf("image") == -1) {continue;}
var reader = new FileReader();
reader.onloadend = chgImg;
reader.file = f;
reader.readAsDataURL(f);
}
e.preventDefault();
}
</script>
</body>
</html>
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