table.getdata returns an empty string - tabulator

Question

I want to save the table to a text file after making changes. When I click the save button tbldata is empty and my text file is overwritten and blank.
I have tested the button with: var tbldata = JSON.stringify([{"id":1, "name":"Bob"}]) and it works.
I am assuming I am using table.getData incorrectly. Where and how in my button function should var tbldata = table.getdata be located?
I cannot find a specific example in the documentation
<button class="button" id="save-data" >Save Data</button>
<script>
//create Tabulator on DOM element
var table = new Tabulator("#meetinfo-table", {
height:200, // set height of table (in CSS or here)
selectable:true, //make rows selectable
layout:"fitDataFill",//fit columns to fit data and width of table (optional)
//Sort data decending
initialSort:[
{column: "meetdate", dir:"desc"}],
//Define Table Columns
columns:[
{title:"Meeting Date", field:"meetdate", width:150, editor:"input"},
{title:"Topic", field:"topic", align:"left", editor:"input"},
{title:"Speaker", field:"speaker", editor:"input"},
{title:"Room", field:"room", editor:"input"},
{title:"CE", field:"ce", align:"left", editor:"input"},
{title:"RSVP Survey Code", field:"rsvpcode",editor: "input"},
{title:"RSVP Due Date", field:"rsvpduedate", editor:"input"},
],
});
//Saves entire table to JSON encoded string
var button = document.getElementById("save-data");
button.addEventListener("click", function(){
var tbldata = table.getdata;
var request= new XMLHttpRequest(); // new HttpRequest instance
request.open("POST", "process.php");
request.setRequestHeader("Content-type", "application/json");
//request.send(tbldata);
});
//loads data into the table
table.setData('meetinfo_array.txt');
</script>

Answer 1

There are two issues there, it is getData not getdata and you a not actually calling the function because you are missing the parenthesis after the function name. It should be:
var tbldata = table.getData();