Here is my code, copied from the Quick Start guide:
//define some sample data
var tabledata = [
{id:1, name:"Oli Bob", age:"12", col:"red", dob:""},
{id:2, name:"Mary May", age:"1", col:"blue", dob:"14/05/1982"},
{id:3, name:"Christine Lobowski", age:"42", col:"green", dob:"22/05/1982"},
{id:4, name:"Brendon Philips", age:"125", col:"orange", dob:"01/08/1980"},
{id:5, name:"Margret Marmajuke", age:"16", col:"yellow", dob:"31/01/1999"},
];
//create Tabulator on DOM element with id "example-table"
var table = new Tabulator("#example-table", {
height:205, // set height of table (in CSS or here), this enables the Virtual DOM and improves render speed dramatically (can be any valid css height value)
data:tabledata, //assign data to table
layout:"fitColumns", //fit columns to width of table (optional)
columns:[ //Define Table Columns
{title:"Name", field:"name", width:150},
{title:"Age", field:"age", align:"left", formatter:"progress"},
{title:"Favourite Color", field:"col"},
{title:"Date Of Birth", field:"dob", sorter:"date", align:"center"},
],
rowClick:function(e, row){ //trigger an alert message when the row is clicked
alert("Row " + row.getData().id + " Clicked!!!!");
},
});
<link href="https://unpkg.com/tabulator-tables@5.2.3/dist/css/tabulator.min.css" rel="stylesheet">
<script type="text/javascript" src="https://unpkg.com/tabulator-tables@5.2.3/dist/js/tabulator.min.js"></script>
<div id="example-table"></div>
When running it here on StackOverflow, it works, but on my machine I get the following:

Each row has the height of the entire table. However, the documentation says:
By default Tabulator will resize the height of a row to fit the contents of its cells.
What am I missing?