<!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>
</head>
<body>
<form id="form">
<input type="text" name="username">
<input type="password" name="password">
<input type="button" value="提交" id="btn">
</form>
<script>
var btn = document.getElementById('btn');
var form = document.getElementById('form');
btn.onclick = function() {
//将普通表单转换为form表单
var formData = new FormData(form);
var xhr = new XMLHttpRequest();
xhr.open('post', 'http://localhost:3000/formData');
xhr.send(formData);
xhr.onload = function() {
if (xhr.status == 200) {
console.log(xhr.responseText);
}
}
}
</script>
</body>
</html>
标签：form,对象,FormData,xhr,var,btn,方法,formData From： https://www.cnblogs.com/wangxianwen/p/16742761.html