Types Of Ajax Call

ajax.php

<!-- To check which are the pages index -->
site:lcm-calculator.com
<!-- 
    data-formAction="{{ route('calculation', ['functionName'=> 'rootCalculator']) }}"
 -->
<script>
    var formData = { expr: inputVal, round: roundVal };
    var url = $('.avc-calculator').attr('data-formAction');

    $.ajax({
        type: "POST",
        url: url,
        headers: { "X-CSRF-TOKEN": $('meta[name="_token"]').attr("content"), },
        data: formData,
        dataType: 'json',
        timeout: 6000,
        beforeSend: function () {
            $('.loader-wrapper').fadeIn('slow')
        },
        success: function (data) { },
        error: function (error) { },
    })
</script>