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Levels in React TreeMap component

You can give ‘n’ number of levels to the tree map. Each level can be separated using the [groupPath] property.

The following customization options are available to customize the tree map levels.

Group path

The [groupPath] property is used to separate each level in tree map. The GroupPath accepts a field in dataSource.

Source
Preview
index.tsx
index.jsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';

class App extends React.Component {
render() {
  return ( <TreeMapComponent id='treemap'
        dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]}
        palette= {["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]}
        weightValuePath= 'EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobDescription' border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobGroup' border={{ color: 'black', width: 0.5 }} />
        </LevelsDirective>
    </TreeMapComponent> );
 }
}
ReactDOM.render(<App />, document.getElementById('treemap'));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';
class App extends React.Component {
    render() {
        return (<TreeMapComponent id='treemap' dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]} palette={["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]} weightValuePath='EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobDescription' border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobGroup' border={{ color: 'black', width: 0.5 }}/>
        </LevelsDirective>
    </TreeMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('treemap'));

Group gap

The [groupGap] property is used to separate an item from every group or another item to differentiate the levels mentioned in the tree map.

Source
Preview
index.tsx
index.jsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';

class App extends React.Component {
render() {
  return ( <TreeMapComponent id='treemap'
        dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]}
        palette= {["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]}
        weightValuePath= 'EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' groupGap={10} border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobDescription' groupGap={10} border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobGroup' groupGap={10} border={{ color: 'black', width: 0.5 }} />
        </LevelsDirective>
    </TreeMapComponent> );
 }
}
ReactDOM.render(<App />, document.getElementById('treemap'));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';
class App extends React.Component {
    render() {
        return (<TreeMapComponent id='treemap' dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]} palette={["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]} weightValuePath='EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' groupGap={10} border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobDescription' groupGap={10} border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobGroup' groupGap={10} border={{ color: 'black', width: 0.5 }}/>
        </LevelsDirective>
    </TreeMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('treemap'));

Header format and alignment

You can customize header using the [headerFormat] property in which fields are mapping from the dataSource. You can also align header using the [headerAlignment] property.

Source
Preview
index.tsx
index.jsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';

class App extends React.Component {
render() {
  return ( <TreeMapComponent id='treemap'
        dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]}
        palette= {["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]}
        weightValuePath= 'EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' headerFormat='${Country}-${EmployeesCount}' headerAlignment='Center' border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobDescription' headerFormat='${JobDescription}-${EmployeesCount}' headerAlignment='Far' border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobGroup' headerFormat='${JobGroup}-${EmployeesCount}' headerAlignment='Near' border={{ color: 'black', width: 0.5 }} />
        </LevelsDirective>
    </TreeMapComponent> );
 }
}
ReactDOM.render(<App />, document.getElementById('treemap'));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';
class App extends React.Component {
    render() {
        return (<TreeMapComponent id='treemap' dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]} palette={["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]} weightValuePath='EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' headerFormat='${Country}-${EmployeesCount}' headerAlignment='Center' border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobDescription' headerFormat='${JobDescription}-${EmployeesCount}' headerAlignment='Far' border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobGroup' headerFormat='${JobGroup}-${EmployeesCount}' headerAlignment='Near' border={{ color: 'black', width: 0.5 }}/>
        </LevelsDirective>
    </TreeMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('treemap'));

Header height and style

You can customize the font color, family, weight, and size using the [headerStyle] property. Based on font size, the header height can be given using the [headerHeight] property.

Source
Preview
index.tsx
index.jsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';

class App extends React.Component {
render() {
  return ( <TreeMapComponent id='treemap'
        dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]}
        palette= {["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]}
        weightValuePath= 'EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' headerHeight={35} headerStyle={{ size:'15px' }} border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobDescription' headerHeight={45} headerStyle={{ size:'15px' }} border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobGroup' headerHeight={40} headerStyle={{ size:'15px' }} border={{ color: 'black', width: 0.5 }} />
        </LevelsDirective>
    </TreeMapComponent> );
 }
}
ReactDOM.render(<App />, document.getElementById('treemap'));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';
class App extends React.Component {
    render() {
        return (<TreeMapComponent id='treemap' dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]} palette={["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]} weightValuePath='EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' headerHeight={35} headerStyle={{ size: '15px' }} border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobDescription' headerHeight={45} headerStyle={{ size: '15px' }} border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobGroup' headerHeight={40} headerStyle={{ size: '15px' }} border={{ color: 'black', width: 0.5 }}/>
        </LevelsDirective>
    </TreeMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('treemap'));

Header template and position

The treemap header supports to customize header of each item using the [headerTemplate] property. It uses Essential JS2 [Template engine] to render the elements. You can position the template using the [templatePosition] property.

The template concepts are illustrated in the following example.

Source
Preview
index.tsx
index.jsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';

class App extends React.Component {
render() {
  return ( <TreeMapComponent id='treemap'
        dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]}
        palette= {["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]}
        weightValuePath= 'EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' headerTemplate='<div>{{:Country}}</div>' headerAlignment='Center' border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobDescription' headerTemplate='<div>{{:JobDescription}}</div>' headerAlignment='Center' border={{ color: 'black', width: 0.5 }} />
            <LevelDirective groupPath='JobGroup' headerTemplate='<div>{{:JobGroup}}</div>' headerAlignment='Far' border={{ color: 'black', width: 0.5 }} />
        </LevelsDirective>
    </TreeMapComponent> );
 }
}
ReactDOM.render(<App />, document.getElementById('treemap'));
import * as React from "react";
import * as ReactDOM from "react-dom";
import { TreeMapComponent, LevelDirective, LevelsDirective } from '@syncfusion/ej2-react-treemap';
class App extends React.Component {
    render() {
        return (<TreeMapComponent id='treemap' dataSource={[
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Marketing', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'USA', JobDescription: 'Management', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 100 },
            { Category: 'Employees', Country: 'India', JobDescription: 'HR Executives', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'India', JobDescription: 'Accounts', EmployeesCount: 40 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Executive', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Sales', JobGroup: 'Analyst', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Marketing', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 80 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Management', EmployeesCount: 10 },
            { Category: 'Employees', Country: 'Germany', JobDescription: 'Accounts', EmployeesCount: 20 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 30 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'HR Executives', EmployeesCount: 50 },
            { Category: 'Employees', Country: 'UK', JobDescription: 'Accounts', EmployeesCount: 60 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Technical', JobGroup: 'Testers', EmployeesCount: 70 },
            { Category: 'Employees', Country: 'France', JobDescription: 'Marketing', EmployeesCount: 100 }
        ]} palette={["#f44336", "#29b6f6", "#ab47bc", "#ffc107", "#5c6bc0", "#009688"]} weightValuePath='EmployeesCount'>
        <LevelsDirective>
            <LevelDirective groupPath='Country' headerTemplate='<div>{{:Country}}</div>' headerAlignment='Center' border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobDescription' headerTemplate='<div>{{:JobDescription}}</div>' headerAlignment='Center' border={{ color: 'black', width: 0.5 }}/>
            <LevelDirective groupPath='JobGroup' headerTemplate='<div>{{:JobGroup}}</div>' headerAlignment='Far' border={{ color: 'black', width: 0.5 }}/>
        </LevelsDirective>
    </TreeMapComponent>);
    }
}
ReactDOM.render(<App />, document.getElementById('treemap'));
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