怎樣使用FormData對象加工表單數據

1. 獲取表單(form)節點

2. 對FormData實例作相關操做

3. 發起HTTP請求

function sendForm(form) {
  var formData = new FormData(form);
  formData.append('csrf', 'e69a18d7db1286040586e6da1950128c');

  var xhr = new XMLHttpRequest();
  xhr.open('POST', form.action, true);
  xhr.onload = function() {
    // ...
  };
  xhr.send(formData);

  return false;
}

var form = document.querySelector('#registration');
sendForm(form);