getProperty() function used to get a particular property value

                      // Read text value from first title of the Chart
document.getElementById('myButton').addEventListener("click", function(){
  let titles = chart.getProperty('titles')
  alert(titles[0].text);
});                 
                  

Let us checkout the example below. Here in the example there is only one DataSeries of type "Bar" and there are 6 DataPoints in it. DataPoints are set through points property of DataSeries. We add more than one DataSeries to create multi-series Chart very easily.