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How to customize the tooltip text dynamically in JavaScript Chart?

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Essential JavaScript Chart dynamically supports customizing tooltip text by using toolTipInitialize event. Refer to Chart Events for more information about the events available in Chart and also refer to ToolTipInitialize event for more information about the parameters available in the event handler.

This event is triggered before displaying the tooltip and provides a parameter containing properties cancel, data, model and type to the event handler. You can customize tooltip text with currentText property available in the data property of the event handler argument.


<div id="container"></div>
<script type="text/javascript">
    function tooltip(sender) { = "Customized tooltip";
        sender.cancel = true;
    $(function () {                
            toolTipInitialize: 'tooltip',
            commonSeriesOptions: {                
                type: 'line',
                dashArray: '10, 5',
                marker: {
                    visible: true,
                tooltip: {

The following screenshot displays the Chart with customized tooltip.

Customization of the tooltip text dynamically

Figure 1: Chart with customized Tooltip

JS Playground sample link: Tooltip text customization


I hope you enjoyed learning about how to customize the tooltip text dynamically in JavaScript Chart.

You can refer to our  JavaScript Chart feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our JavaScript Chart example to understand how to create and manipulate data.

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