转自：https://blog.csdn.net/AK852369/article/details/102778622
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>上传文件</title>
</head>
<body>
<input type="file" id="upload" />
<!-- accept="image/*" -->
</body>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<script>
$("#upload").change(function (link) {
var file = link.target.files[0];
var formData = new FormData();
formData.append("file", file);
formData.append("key", "Gn15XGagWO");
$.ajax({
url: "upload",
type: "post",
data: formData,
dataType: 'json',
contentType: false,
processData: false,
xhr: function () {
var xhr = $.ajaxSettings.xhr();
if (onprogress && xhr.upload) {
xhr.upload.addEventListener("progress", onprogress, false);
return xhr;
}
},
success: function (res) {
}
})
})
function onprogress(evt) {
console.log(evt)
var loaded = evt.loaded; //已经上传大小情况
var tot = evt.total; //附件总大小
var per = Math.floor(100 * loaded / tot); //已经上传的百分比
console.log(loaded)
console.log(tot)
console.log(per)
}
</script>
</html>
