Angular Funnel API

The Funnel is a widget that visualizes a value at different stages. It helps assess value changes throughout these stages and identify potential issues. The Funnel widget conveys information using different interactive elements (tooltips, labels, legend) and enables you to create not only a funnel, but also a pyramid chart.

import { DxFunnelModule } from "devextreme-angular"

DevExtreme widgets are integrated with many popular libraries and frameworks. See the Installation section (for JavaScript libraries) or the Prerequisites and Installation section (for ASP.NET MVC framework) to find details on setting up DevExtreme with a particular library or framework.

The following code shows how to create the Funnel widget using every supported library and framework. For more details on working with widgets in these libraries and frameworks, see the Widget Basics topic for jQuery, Angular, AngularJS, Knockout or ASP.NET MVC.

jQuery

JavaScript

HTML

var userStatistics = [
    { action: "Visited the Website", users: 9152 },
    { action: "Downloaded a Trial", users: 6879 },
    { action: "Contacted Support", users: 5121 },
    { action: "Subscribed", users: 2224 },
    { action: "Renewed", users: 1670 }
];

$(function() {
    $("#funnel").dxFunnel({
        dataSource: userStatistics,
        argumentField: "action",
        valueField: "users"
    });
});

<div id="funnel"></div>

Angular

HTML

TypeScript

<dx-funnel
    [dataSource]="userStatistics"
    argumentField="action"
    valueField="users">
</dx-funnel>

import { DxFunnelModule } from 'devextreme-angular';
// ...
export class AppComponent {
    userStatistics = [
        { action: "Visited the Website", users: 9152 },
        { action: "Downloaded a Trial", users: 6879 },
        { action: "Contacted Support", users: 5121 },
        { action: "Subscribed", users: 2224 },
        { action: "Renewed", users: 1670 }
    ];
}
@NgModule({
    imports: [
        // ...
        DxFunnelModule
    ],
    // ...
})

AngularJS

HTML

JavaScript

<div ng-controller="DemoController">
    <div dx-funnel="{
        dataSource: userStatistics,
        argumentField: 'action',
        valueField: 'users'
    }"></div>
</div>

angular.module('DemoApp', ['dx'])
    .controller("DemoController", function ($scope) {
        $scope.userStatistics = [
            { action: "Visited the Website", users: 9152 },
            { action: "Downloaded a Trial", users: 6879 },
            { action: "Contacted Support", users: 5121 },
            { action: "Subscribed", users: 2224 },
            { action: "Renewed", users: 1670 }
        ];
    });

Knockout

HTML

JavaScript

<div data-bind="dxFunnel: {
    dataSource: userStatistics,
    argumentField: 'action',
    valueField: 'users'
}"></div>

var viewModel = {
    userStatistics: [
        { action: "Visited the Website", users: 9152 },
        { action: "Downloaded a Trial", users: 6879 },
        { action: "Contacted Support", users: 5121 },
        { action: "Subscribed", users: 2224 },
        { action: "Renewed", users: 1670 }
    ]
};

ko.applyBindings(viewModel);

ASP.NET MVC Controls

Razor C#

Razor VB

@(Html.DevExtreme().Funnel()
    .ID("funnel")
    .DataSource(new List&lt;object&gt; {
        new { Action = "Visited the Website", Users = 9152 },
        new { Action = "Downloaded a Trial", Users = 6879 },
        new { Action = "Contacted Support", Users = 5121 },
        new { Action = "Subscribed", Users = 2224 },
        new { Action = "Renewed", Users = 1670 }
    })
    .ArgumentField("Action")
    .ValueField("Users")
)

@(Html.DevExtreme().Funnel() _
    .ID("funnel") _
    .DataSource(New List(Of Object) From {
        New With { .Action = "Visited the Website", .Users = 9152 },
        New With { .Action = "Downloaded a Trial", .Users = 6879 },
        New With { .Action = "Contacted Support", .Users = 5121 },
        New With { .Action = "Subscribed", .Users = 2224 },
        New With { .Action = "Renewed", .Users = 1670 }
    }) _
    .ArgumentField("Action") _
    .ValueField("Users")
)

View Demo

Configuration

This section describes options that configure the Funnel widget's contents, behavior and appearance.

Name	Description
adaptiveLayout	Specifies adaptive layout options.
algorithm	Specifies the algorithm for building the funnel.
argumentField	Specifies which data source field provides arguments for funnel items. The argument identifies a funnel item and represents it on the legend.
colorField	Specifies which data source field provides colors for funnel items. If this field is absent, the palette provides the colors.
dataSource	Specifies the widget's data origin.
elementAttr	Specifies the attributes to be attached to the widget's root element.
export	Configures the exporting and printing features.
hoverEnabled	Specifies whether funnel items change their style when a user pauses on them.
inverted	Turns the funnel upside down.
item	Configures funnel items' appearance.
label	Configures funnel item labels.
legend	Configures the legend.
loadingIndicator	Configures the loading indicator.
margin	Generates space around the widget.
neckHeight	Specifies the ratio between the height of the neck and that of the whole funnel. Accepts values from 0 to 1. Applies only if the algorithm is "dynamicHeight".
neckWidth	Specifies the ratio between the width of the neck and that of the whole funnel. Accepts values from 0 to 1. Applies only if the algorithm is "dynamicHeight".
onDisposing	A handler for the disposing event. Executed when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
onDrawn	A function that is executed when the widget's rendering has finished.
onExported	A handler for the exported event. Executed after data from the widget is exported.
onExporting	A handler for the exporting event. Executed before data from the widget is exported.
onFileSaving	A handler for the fileSaving event. Executed before a file with exported data is saved on the user's local storage.
onHoverChanged	A handler for the hoverChanged event. Executed after a funnel item's hover state is changed in the UI or programmatically.
onIncidentOccurred	A handler for the incidentOccurred event. Executed when an error or warning appears in the widget.
onInitialized	A handler for the initialized event. Executed only once, after the widget is initialized.
onItemClick	A handler for the itemClick event. Executed when a user clicks a funnel item.
onLegendClick	A handler for the legendClick event. Executed when a user clicks a legend item.
onOptionChanged	A handler for the optionChanged event. Executed after an option of the widget is changed.
onSelectionChanged	A handler for the selectionChanged event. Executed after a funnel item's selection state is changed in the UI or programmatically.
palette	Sets the palette to be used for colorizing funnel items.
pathModified	Notifies the widget that it is embedded into an HTML page that uses a tag modifying the path.
redrawOnResize	Specifies whether to redraw the widget when the size of the parent browser window changes or a mobile device rotates.
rtlEnabled	Switches the widget to a right-to-left representation.
selectionMode	Specifies whether a single or multiple funnel items can be in the selected state at a time. Assigning "none" disables the selection feature.
size	Specifies the widget's size in pixels.
sortData	Specifies whether to sort funnel items.
theme	Sets the name of the theme the widget uses.
title	Configures the widget's title.
tooltip	Configures tooltips - small pop-up rectangles that display information about a data-visualizing widget element being pressed or hovered over with the mouse pointer.
valueField	Specifies which data source field provides values for funnel items. The value defines a funnel item's area.

Methods

This section describes the methods that control the Funnel widget.

Name	Description
beginUpdate()	Prevents the widget from refreshing until the endUpdate() method is called.
clearSelection()	Cancels the selection of all funnel items.
dispose()	Disposes of all the resources allocated to the Funnel instance.
element()	Gets the root widget element.
endUpdate()	Refreshes the widget after a call of the beginUpdate() method.
exportTo(fileName, format)	Exports the widget.
getAllItems()	Provides access to all funnel items.
getDataSource()	Provides access to the DataSource instance.
getInstance(element)	Gets the instance of a widget found using its DOM node.
getSize()	Gets the current widget size.
hideLoadingIndicator()	Hides the loading indicator.
hideTooltip()	Hides all widget tooltips.
instance()	Gets the widget's instance. Use it to access other methods of the widget.
off(eventName)	Detaches all event handlers from a single event.
off(eventName, eventHandler)	Detaches a particular event handler from a single event.
on(eventName, eventHandler)	Subscribes to an event.
on(events)	Subscribes to events.
option()	Gets all widget options.
option(optionName)	Gets the value of a single option.
option(optionName, optionValue)	Updates the value of a single option.
option(options)	Updates the values of several options.
print()	Opens the browser's print window.
render()	Redraws the widget.
showLoadingIndicator()	Shows the loading indicator.
svg()	Gets the widget's SVG markup.

Events

This section describes events that the Funnel widget raises.

Name	Description
disposing	Raised when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
drawn	Raised when the widget's rendering has finished.
exported	Raised after data from the widget is exported.
exporting	Raised before data from the widget is exported.
fileSaving	Raised before a file with exported data is saved on the user's local storage.
hoverChanged	Raised after a funnel item's hover state is changed in the UI or programmatically.
incidentOccurred	Raised when an error or warning appears in the widget.
initialized	Raised only once, after the widget is initialized.
itemClick	Raised when a user clicks a funnel item.
legendClick	Raised when a user clicks a legend item.
optionChanged	Raised after a widget option is changed.
selectionChanged	Raised after a funnel item's selection state is changed in the UI or programmatically.

Item

This section describes the Item object, which represents a funnel item.

The Item object is passed to most event handlers and callback functions in an argument's field. You can also access Item objects using the getAllItems() method.

Angular Funnel API

jQuery

Angular

AngularJS

Knockout

ASP.NET MVC Controls

See Also

Configuration

See Also

Methods

See Also

Events

See Also

Item