如何在javascript (vanilla或jQuery)中序列化表单数据时获得多个选择选项？

var form = document.getElementById("myForm");
var formData = {};

for (var i = 0; i < form.elements.length; i++) {
  var field = form.elements[i];
  
  if (field.type === "checkbox" || field.type === "radio") {
    if (field.checked) {
      formData[field.name] = field.value;
    }
  } else {
    formData[field.name] = field.value;
  }
}

console.log(formData);

var formData = $("#myForm").serializeArray();
var serializedData = {};

$.each(formData, function(index, field) {
  if (serializedData[field.name]) {
    if (!Array.isArray(serializedData[field.name])) {
      serializedData[field.name] = [serializedData[field.name]];
    }
    serializedData[field.name].push(field.value);
  } else {
    serializedData[field.name] = field.value;
  }
});

console.log(serializedData);