ExtReact Docs Help


The documentation for the ExtReact product diverges somewhat from the documentation of other Sencha products. The sections below describe documentation for all products except where indicated as unique to ExtReact.

Terms, Icons, and Labels

Many classes have shortcut names used when creating (instantiating) a class with a configuration object. The shortcut name is referred to as an alias (or xtype if the class extends Ext.Component). The alias/xtype is listed next to the class name of applicable classes for quick reference.

ExtReact component classes list the configurable name prominently at the top of the API class doc followed by the fully-qualified class name.

Access Levels

Framework classes or their members may be specified as private or protected. Else, the class / member is public. Public, protected, and private are access descriptors used to convey how and when the class or class member should be used.

Member Types

Member Syntax

Below is an example class member that we can disect to show the syntax of a class member (the lookupComponent method as viewed from the Ext.button.Button class in this case).

lookupComponent ( item ) : Ext.Component

Called when a raw config object is added to this container either during initialization of the items config, or when new items are added), or {@link #insert inserted.

This method converts the passed object into an instanced child component.

This may be overridden in subclasses when special processing needs to be applied to child creation.


item :  Object

The config object being added.


The component to be added.

Let's look at each part of the member row:

Member Flags

The API documentation uses a number of flags to further commnicate the class member's function and intent. The label may be represented by a text label, an abbreviation, or an icon.

Class Icons

- Indicates a framework class

- A singleton framework class. *See the singleton flag for more information

- A component-type framework class (any class within the Ext JS framework that extends Ext.Component)

- Indicates that the class, member, or guide is new in the currently viewed version

Member Icons

- Indicates a class member of type config

Or in the case of an ExtReact component class this indicates a member of type prop

- Indicates a class member of type property

- Indicates a class member of type method

- Indicates a class member of type event

- Indicates a class member of type theme variable

- Indicates a class member of type theme mixin

- Indicates that the class, member, or guide is new in the currently viewed version

Class Member Quick-Nav Menu

Just below the class name on an API doc page is a row of buttons corresponding to the types of members owned by the current class. Each button shows a count of members by type (this count is updated as filters are applied). Clicking the button will navigate you to that member section. Hovering over the member-type button will reveal a popup menu of all members of that type for quick navigation.

Getter and Setter Methods

Getting and setter methods that correlate to a class config option will show up in the methods section as well as in the configs section of both the API doc and the member-type menus just beneath the config they work with. The getter and setter method documentation will be found in the config row for easy reference.

ExtReact component classes do not hoist the getter / setter methods into the prop. All methods will be described in the Methods section

History Bar

Your page history is kept in localstorage and displayed (using the available real estate) just below the top title bar. By default, the only search results shown are the pages matching the product / version you're currently viewing. You can expand what is displayed by clicking on the button on the right-hand side of the history bar and choosing the "All" radio option. This will show all recent pages in the history bar for all products / versions.

Within the history config menu you will also see a listing of your recent page visits. The results are filtered by the "Current Product / Version" and "All" radio options. Clicking on the button will clear the history bar as well as the history kept in local storage.

If "All" is selected in the history config menu the checkbox option for "Show product details in the history bar" will be enabled. When checked, the product/version for each historic page will show alongside the page name in the history bar. Hovering the cursor over the page names in the history bar will also show the product/version as a tooltip.

Search and Filters

Both API docs and guides can be searched for using the search field at the top of the page.

On API doc pages there is also a filter input field that filters the member rows using the filter string. In addition to filtering by string you can filter the class members by access level, inheritance, and read only. This is done using the checkboxes at the top of the page.

The checkbox at the bottom of the API class navigation tree filters the class list to include or exclude private classes.

Clicking on an empty search field will show your last 10 searches for quick navigation.

API Doc Class Metadata

Each API doc page (with the exception of Javascript primitives pages) has a menu view of metadata relating to that class. This metadata view will have one or more of the following:

Expanding and Collapsing Examples and Class Members

Runnable examples (Fiddles) are expanded on a page by default. You can collapse and expand example code blocks individually using the arrow on the top-left of the code block. You can also toggle the collapse state of all examples using the toggle button on the top-right of the page. The toggle-all state will be remembered between page loads.

Class members are collapsed on a page by default. You can expand and collapse members using the arrow icon on the left of the member row or globally using the expand / collapse all toggle button top-right.

Desktop -vs- Mobile View

Viewing the docs on narrower screens or browsers will result in a view optimized for a smaller form factor. The primary differences between the desktop and "mobile" view are:

Viewing the Class Source

The class source can be viewed by clicking on the class name at the top of an API doc page. The source for class members can be viewed by clicking on the "view source" link on the right-hand side of the member row.

ExtAngular 6.7.0


NPM Package





A mixin which allows a data component to be sorted. This is used by e.g. Ext.data.Store and Ext.data.TreeStore.

NOTE: This mixin is mainly for internal use and most users should not need to use it directly. It is more likely you will want to use one of the component classes that import this mixin, such as Ext.data.Store or Ext.data.TreeStore.

No members found using the current filters


Optional Configs

defaultSortDirection : String

The default sort direction to use if one is not specified.

Defaults to:


multiSortLimit : Number

The maximum number of sorters which may be applied to this Sortable when using the "multi" insertion position when adding sorters.

New sorters added using the "multi" insertion position are inserted at the top of the sorters list becoming the new primary sort key.

If the sorters collection has grown to longer then multiSortLimit, then the it is trimmed.

Defaults to:


sorters : Ext.util.Sorter[] / Object[]

The initial set of Ext.util.Sorter.

sorters: [{
    property: 'age',
    direction: 'DESC'
}, {
    property: 'firstName',
    direction: 'ASC'

Defaults to:


getSorters : Ext.util.Sorter[] / Object[]

Returns the value of sorters


Ext.util.Sorter[] / Object[]

setSorters (sorters)

Sets the value of sorters


sorters :  Ext.util.Sorter[] / Object[]

sortRoot : String

The property in each item that contains the data to sort.


Instance Properties

isSortable : Boolean

true in this class to identify an object as an instantiated Sortable, or subclass thereof.

Defaults to:



Instance Methods


Returns a comparator function which compares two items and returns -1, 0, or 1 depending on the currently defined set of cfg-sorters.

If there are no cfg-sorters defined, it returns a function which returns 0 meaning that no sorting will occur.

sort ( [sorters], [direction], [insertionPosition], doSort ) : Ext.util.Sorter[]

Updates the sorters collection and triggers sorting of this Sortable. Example usage:

//sort by a single field
myStore.sort('myField', 'DESC');

//sorting by multiple fields
    property : 'age',
    direction: 'ASC'
}, {
    property : 'name',
    direction: 'DESC'

Classes which use this mixin must implement a soSort method which accepts a comparator function computed from the full sorter set which performs the sort in an implementation-specific way.

When passing a single string argument to sort, Store maintains a ASC/DESC toggler per field, so this code:


Is equivalent to this code, because Store handles the toggling automatically:

store.sort('myField', 'ASC');
store.sort('myField', 'DESC');


sorters :  String/Ext.util.Sorter[] (optional)

Either a string name of one of the fields in this Store's configured Ext.data.Model, or an array of sorter configurations.

direction :  String (optional)

The overall direction to sort the data by.

Defaults to: "ASC"

insertionPosition :  String (optional)

Where to put the new sorter in the collection of sorters. This may take the following values:

  • replace : This means that the new sorter(s) becomes the sole sorter set for this Sortable. This is the most useful call mode

        to programatically sort by multiple fields.
  • prepend : This means that the new sorters are inserted as the primary sorters, unchanged, and the sorter list length must be controlled by the developer.

  • multi : This is mainly useful for implementing intuitive "Sort by this" user interfaces such as the GridPanel's column sorting UI.

    This mode is only supported when passing a property name and a direction.

    This means that the new sorter is becomes the primary sorter. If the sorter was already the primary sorter, the direction of sort is toggled if no direction parameter is specified.

    The number of sorters maintained is limited by the multiSortLimit configuration.

  • append : This means that the new sorter becomes the last sorter.

Defaults to: "replace"

doSort :  Boolean

True to sort using a generated sorter function that combines all of the Sorters passed



The new sorters.

Static Methods

createComparator ( sorters ) : Function
static sta

Creates a single comparator function which encapsulates the passed Sorter array.


sorters :  Ext.util.Sorter[]

The sorter set for which to create a comparator function



a function, which when passed two comparable objects returns the result of the whole sorter comparator functions.

override ( members ) : Ext.Base
static sta

Override members of this class. Overridden methods can be invoked via Ext.Base#callParent.

Ext.define('My.Cat', {
    constructor: function() {
        alert("I'm a cat!");

    constructor: function() {
        alert("I'm going to be a cat!");



var kitty = new My.Cat(); // alerts "I'm going to be a cat!"
                          // alerts "I'm a cat!"
                          // alerts "Meeeeoooowwww"

Direct use of this method should be rare. Use Ext.define instead:

Ext.define('My.CatOverride', {
    override: 'My.Cat',
    constructor: function() {
        alert("I'm going to be a cat!");



The above accomplishes the same result but can be managed by the Ext.Loader which can properly order the override and its target class and the build process can determine whether the override is needed based on the required state of the target class (My.Cat).


members :  Object

The properties to add to this class. This should be specified as an object literal containing one or more properties.



this class


beforesort ( me, sorters, eOpts )

Fires before a sort occurs.


me :  Ext.util.Sortable

This object.

sorters :  Ext.util.Sorter[]

The collection of Sorters being used to generate the comparator function.

eOpts : Object

The options object passed to Ext.util.Observable.addListener.

ExtAngular 6.7.0