Tooltip

A tooltip follows the pointer movement and is used to indicate the value of a point. This feature is applicable for line, column, pie, and area Sparkline. You can enable the tooltip by setting it’s visible property as true.

  • javascript
  • /// <reference path="tsfiles/jquery.d.ts" />
    /// <reference path="tsfiles/ej.web.all.d.ts" />
    
    module SparklineComponent {
        $(function () {
            var sample = new ej.datavisualization.Sparkline($("#Sparkline"),{
             // ...
                tooltip: {
                    visible: true,
                },
                // ...
           });
        });
    }

    Tooltip Customization

    You can customize the tooltip fill color, border,border properties border color, border widthand font properties color, font family, font style, font weight, opacity, size

  • javascript
  • $(function () {
            var sample = new ej.datavisualization.Sparkline($("#Sparkline"),{
                // ...
                tooltip: {
                    fill: 'red',
                    border: {
                        color: "green",
                        width: 3
                    },
                    font: {
                        size: "12px",
                        fontFamily : "Algerian",
                        fontStyle : "italic",
                        fontWeight : "lighter",
                        opacity : 0.5,
                    }
                },
                // ...
           });
    });

    Tooltip Template

    HTML elements can be displayed in the tooltip by using the template option of the tooltip. The template option takes the value of the id attribute of the HTML element. You can use the #point.x# and #point.y# as place holders in the HTML element to display the x and y values of the corresponding point.

  • javascript
  • <div id="item" style="display: none;">
        <div>
            <div>#point.x#</div>
            <div>#point.y#</div>
        </div>
    </div>
    
    $(function () {
            var sample = new ej.datavisualization.Sparkline($("#Sparkline"),{
                // ...
                tooltip: {
                    visible: true,
                    template: "item",
                },
                // ...
          });
    });