$('#yourMultiselect').on('change', function() {
    var selectedValues = $(this).val();
    // 发送数据到服务器
    $.ajax({
        url: 'your-endpoint',
        method: 'POST',
        data: { selections: selectedValues },
        success: function(response) {
            console.log('Data sent successfully');
        }
    });
});

<form id="myForm">
    <select id="yourMultiselect" name="selections[]" multiple>
        <option value="1">Option 1</option>
        <option value="2">Option 2</option>
    </select>
</form>

<script>
$('#myForm').on('submit', function(e) {
    e.preventDefault();
    var formData = $(this).serialize();
    $.post('your-endpoint', formData, function(response) {
        console.log(response);
    });
});
</script>

$('#yourMultiselect').multiselect({
    // 插件配置
    onChange: function(option, checked) {
        var selected = $('#yourMultiselect').val();
        console.log('Current selections:', selected);
        // 可以在这里发送数据
    }
});

// 确保发送数组格式数据
var selectedValues = $('#yourMultiselect').val() || []; // 防止null值

$.ajax({
    url: 'your-endpoint',
    method: 'POST',
    traditional: true, // 对于数组参数很重要
    data: { selections: selectedValues },
    dataType: 'json'
});

console.log('Selected values:', $('#yourMultiselect').val());