h5配合ajax无刷新上传图片,带进步条,简单易用
var xmlhttp;
if (window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest();
}
else
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.upload.onprogress = function (ev) {
var percent = 0;
if(ev.lengthComputable) {
percent = 100 * ev.loaded/ev.total;
//document.getElementById('progress').innerHTML = percent;
document.getElementById('bar').style.width = percent + '%';
}
}
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