Example of undefined in Javascript Heatmap Chart Control


This sample visualizes the number of international tourist arrivals in millions of the most visited destinations in the world.

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In this example, you can see how to bind JSON data and configure the Heatmap using the data adaptor support. You can bind the JSON data with information for each cell to the Heatmap using isJsonData and by defining the adaptorType properties. In cell JSON data, the value for each cell is mapped using the xDataMapping , yDataMapping and valueMapping properties. The tooltip is enabled in this example. To see the tooltip in action, hover the mouse over an item or tap an item on touch-enabled devices. Injecting Module Heatmap component features are separated into discrete feature-based modules. To use data adaptor support, inject the Adaptor module using Heatmap.Inject(Adaptor) method, to use a tooltip, inject the Tooltip module using the Heatmap.Inject(Tooltip) method, and to use a legend, inject the Legend module using the Heatmap.Inject(Legend) method.