遍历formData对象数据

const formData = new FormData();

formData.append(“user”, '用脑袋行走的人');

formData.append('age', 18);

//第一种
for (var value of formData.values()) {
　　console.log(value);
}
//第二种
for (var [a, b] of formData.entries()) {
　　console.log(a, b);
}

//第三种

for (var key of formData.keys()) {
　console.log(key, formData.get(key));
}