问使用active类获取元素，并使用jQuery在Ajax中发送它们

EN

//Initilize formData
var formData = new FormData()

//Each through elements
$('a').each(function(index, element) {
  //check all element with class active only
  if ($(element).attr('class') == 'active') {
    //append active class data-name and value
    formData.append($(element).data('name'), $(element).data('value'))
  }
})

//Click event
$('#send').click(function(e) {
  e.preventDefault()

  // Display the key/value pairs of formData - demo only
  for (var pair of formData.entries()) {
    console.log(pair[0] + ', ' + pair[1]);
  }

  //call ajax on send button click
  $.ajax({
    url: 'some_url.php',
    type: 'POST',
    data: formData,
    contentType: false,
    processData: false,
    success: function(data) {
      console.log(data)
    }
  })
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form id="myForm" method="post" enctype="multipart/form-data">
  <a href="#" data-name="color" data-value="yellow" class="active">
  </a>
  <a href="#" data-name="color" data-value="red">
  </a>
  <a href="#" data-name="color" data-value="orange">
  </a>

  <a href="#" data-name="fruit" data-value="banana" class="active"></a>
  <a href="#" data-name="fruit" data-value="apple">
  </a>

  <button id="send">Send</button>
</form>

var arr = [] //create arry

$("form > a.active").each(function() {
  arr.push($(this).attr('data-value')) //push value in array
})
console.log(arr)

var json_array = [];
$("form > a.active").each(function() {
  item = {}; //object create
  item[$(this).attr('data-name')] = $(this).attr('data-value')
  json_array.push(item) //push value in array
});

console.log(json_array)

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form>
  <a href="#" data-name="color" data-value="yellow" class="active"> </a>
  <a href="#" data-name="color" data-value="red"> </a>
  <a href="#" data-name="color" data-value="orange"> </a>

  <a href="#" data-name="fruit" data-value="banana" class="active"> </a>
  <a href="#" data-name="fruit" data-value="apple">
  </a>
  <button id="send">Send</button>
</form>