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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style></style>
</head>
<body>
<input type="file" multiple />
<button onclick="upload()">上传</button>
</body>
<script>
const file = document.getElementsByTagName('input')[0]
file.onchange = e => {
e.preventDefault()
// upload()
}
function upload() {
const ajax = new XMLHttpRequest()
ajax.open('POST', 'http://localhost:3000/upload', true)
const fd = new FormData()
for (const item of file.files) {
fd.append('files', item)
}
ajax.send(fd)
ajax.onreadystatechange = e => {
if (ajax.readyState === 4 && ajax.status === 200) {
}
}
ajax.addEventListener('load', e => {
console.log('加载', e)
})
ajax.addEventListener('loadstart', e => {
console.log('开始加载', e)
})
ajax.addEventListener('progress', e => {
console.log('上传中', e)
})
ajax.addEventListener('loadend', e => {
console.log('上传完成', e)
})
}
// console.log(file.files)
</script>
</html>