igDataChart valueOverlay target line and format label

by georgianastasov

HTML

<script src="https://igniteui.com/js/modernizr.min.js"></script>
<script src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.10.3/jquery-ui.min.js"></script>
<script src="https://cdn-na.infragistics.com/igniteui/latest/js/infragistics.core.js"></script>
<script src="https://cdn-na.infragistics.com/igniteui/latest/js/infragistics.dv.js"></script>
<script src="https://igniteui.com/js-data/world-energy-production"></script>
<link href="https://cdn-na.infragistics.com/igniteui/latest/css/themes/infragistics/infragistics.theme.css" rel="stylesheet"></link>
<link href="https://cdn-na.infragistics.com/igniteui/latest/css/structure/infragistics.css" rel="stylesheet"></link>
<link href="https://cdn-na.infragistics.com/igniteui/latest/css/structure/modules/infragistics.ui.chart.css" rel="stylesheet"></link>

<div>
        <div>
            <div id="chart" class="chart"></div>
            <div id="legend" class="legend"></div>
        </div> 
    </div>

CSS

.tooltip { margin: 0px 5px 0px 5px; }

        .chart {
            display: inline-block;
        }
        .legend {
            display: inline-block; 
        }
        
        .ui-chart-legend-item-text{
           font-size: 1rem !important;
        }

JavaScript

$(function () {
						var data = [{Year: 2023, PG1: 2000, PG2: 4000, PG3: 6000, PG4: 4000, National: 2000}];
            const numberFormatter = new Intl.NumberFormat('en-US', {
    						minimumFractionDigits: 1,
    						maximumFractionDigits: 2
						});
            
            $("#chart").igDataChart({
                dataSource: data,
                width: "700px",
                height: "450px", 
                title: "Energy Production Per Country",
                legend: { element: "legend" },
                horizontalZoomable: true,
                verticalZoomable: true,
                axes: [{
                    type: "categoryX",
                    name: "XAxis",
                    label: "Year",
                    strokeThickness: 5,
                    title: "Year"
                }, {
                    type: "numericY",
                    name: "YAxis",
                    minimumValue: 0,
                    maximumValue: 10000,
                    strokeThickness: 5,
                    title: "Quadrillion Btu",
                    formatLabel: function (value) {
                    		return numberFormatter.format(value);
                		}
                }],
                series: [ 
                    CreateColumnSeries("PG1", "PG1"),
                    CreateColumnSeries("PG2", "PG2"),
                    CreateColumnSeries("PG3", "PG3"),
                    CreateColumnSeries("PG4", "PG4"),
                    { 
                			name: "National", 
               	 			type: "valueOverlay", 
                			value: 3333.123456789,
                      labelFormat: "n2",
                			axis: "YAxis", 
                			title: "National", 
                			isAxisAnnotationEnabled: true,
                			formatLabel: function (value) {
                    			return new Intl.NumberFormat().format(value);
                			}
            				}
                 ],
            }); 
            
            function...