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Showing content from https://js.devexpress.com/React/Documentation/ApiReference/UI_Components/dxTreeMap/Methods/ below:

React TreeMap Methods | React Documentation

This section describes methods that can be called to manipulate the TreeMap UI component.

Postpones rendering that can negatively affect performance until the endUpdate() method is called.

The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.

Deselects all nodes in the UI component.

To deselect a particular node, call its select(state) method.

Disposes of all the resources allocated to the TreeMap instance.

After calling this method, remove the DOM element associated with the UI component:

$("#myTreeMap").dxTreeMap("dispose");
$("#myTreeMap").remove();

Use conditional rendering instead of this method:

<dx-tree-map ...
    *ngIf="condition">
</dx-tree-map>

Use conditional rendering instead of this method:

<template>
    <DxTreeMap ...
        v-if="condition">
    </DxTreeMap>
</template>

<script>
import DxTreeMap from 'devextreme-vue/tree-map';

export default {
    components: {
        DxTreeMap
    }
}
</script>

Use conditional rendering instead of this method:

import React from 'react';

import TreeMap from 'devextreme-react/tree-map';

function DxTreeMap(props) {
    if (!props.shouldRender) {
        return null;
    }

    return (
        <TreeMap ... >    
        </TreeMap>
    );
}

class App extends React.Component {
    render() {
        return (
            <DxTreeMap shouldRender="condition" />
        );
    }
}
export default App;

Drills one level up.

To learn how to implement the drill down functionality, see the drillDown() method description.

Gets the root UI component element.

Refreshes the UI component after a call of the beginUpdate() method.

The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.

Exports the UI component.

The name of the file to which the UI component is about to be exported.

The file's format. One of 'PNG', 'PDF', 'JPEG', 'SVG' and 'GIF'.
PNG is used if the browser does not support exporting to the specified format.

Gets the current node.

If the drill down feature is not implemented, this method returns the root node.

Gets the instance of a UI component found using its DOM node.

The UI component's container.

The UI component's instance.

getInstance is a static method that the UI component class supports. The following code demonstrates how to get the TreeMap instance found in an element with the myTreeMap ID:

// Modular approach
import TreeMap from "devextreme/viz/tree_map";
...
let element = document.getElementById("myTreeMap");
let instance = TreeMap.getInstance(element) as TreeMap;

// Non-modular approach
let element = document.getElementById("myTreeMap");
let instance = DevExpress.viz.dxTreeMap.getInstance(element);

• 3rd-Party Frameworks Integration API

Gets the root node.

The root node; described in the Node section.

Gets the current UI component size.

The current UI component size.

Returns an object with the following fields.

• width
  The width of the UI component in pixels.
• height
  The height of the UI component in pixels.

Hides the loading indicator.

Although the loading indicator hides automatically once the UI component is ready, you can hide it from code at the required moment using this method.

• showLoadingIndicator()

Hides the tooltip.

Use this and showTooltip() methods to change the visibility of the tooltip programmatically.

Gets the UI component's instance. Use it to access other methods of the UI component.

This UI component's instance.

Detaches all event handlers from a single event.

The object for which this method is called.

Detaches a particular event handler from a single event.

The event's name.

The event's handler.

The object for which this method is called.

Subscribes to an event.

The event's name.

The event's handler.

The object for which this method is called.

Use this method to subscribe to one of the events listed in the Events section.

Subscribes to events.

Events with their handlers: { "eventName1": handler1, "eventName2": handler2, ...}

The object for which this method is called.

Use this method to subscribe to several events with one method call. Available events are listed in the Events section.

Gets the value of a single property.

The property's name or full path.

Return Value: any

This property's value.

Updates the value of a single property.

The property's name or full path.

optionValue: any

This property's new value.

Updates the values of several properties.

Options with their new values.

Opens the browser's print window.

Redraws the UI component.

Normally, the UI component redraws itself automatically after the browser window is resized. But on rare occasions, you may need to request the redrawing, for example, after the UI component's container is resized. For this purpose, call the render() method.

View on GitHub

Resets the drill down level.

Calling this method makes the root level the current one. If you need to drill one level up or down, use the drillUp() method of the UI component or the drillDown() method of a node.

Resets a property to its default value.

Shows the loading indicator.

Gets the UI component's SVG markup.

The UI component's SVG markup.

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