我如何发送多个AJAX请求[重复]

Question

This question already has an answer here:

• jquery how to use multiple ajax calls one after the end of the other 9 answers
• jQuery send and display ajax result per line of textarea 1 answer

I have a textarea in my html, I want to send each lines via ajax to my request page and get the response but I don't know how to.

Example -
textarea lines -
Akib
Richard
Parkar

[Button Check]

it should return one-by-one line, like Akib - 90 Scores then Richard - 50 scores Parkar 40 scores

without refreshing

I only have a code that send single data and get single response

there is the single response getting code

<script>
        function GetResult() {
            var xmlhttp = new XMLHttpRequest();
            var str = $('textarea#combo').val();
            //var decCount = $('#invalid-count').val();
            xmlhttp.onreadystatechange = function() {
                if (this.readyState == 4 && this.status == 200) {
                    if ( this.responseText.indexOf("Dec") > -1 ) {
                        decCount=$('#invalid-count').val()+1;
                        var output = '<div class="result-div">'+this.responseText+'</div>';
                        $("#result-dec").append(output);
                        alert(decCount);
                        document.getElementById("invalid-count").innerHTML=decCount;
                    }
                }
            };
            xmlhttp.open("GET", "test2.php?combo=" + str, true);
            xmlhttp.send();
        }
    </script>```

</div>