我正试图插入表单内容，但它在控制台上打印null

Question

console.log(data)语句在控制台上打印null。我必须将表单数据(其id为"myform")发送到Java后端post方法。但是这个代码不能正常工作。有人能告诉我错误吗?

var myform = document.getElementById("myform");
var data = new FormData();
console.log(data);
jQuery.ajax({
url: '/WeatherApi/UserDetailsController',
data: data,
cache: false,
contentType: false,
processData: false,
method:'POST',
success: function(data){
alert(data);
}
});

Answer 1

var myform = document.getElementById("myform");
var data = new FormData(myform);
console.log(...data);
for (var [key, value] of data.entries()) { 
console.log(key, value);
}