Docs Help

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.

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
protected

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.

Parameters

item :  Object

The config object being added.

Returns
Ext.Component

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

- 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.

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.

Ext JS 6.2.1 - Modern Toolkit


top

Ext.ComponentQuery singleton

Summary

Provides searching of Components within Ext.ComponentManager (globally) or a specific Ext.container.Container on the document with a similar syntax to a CSS selector. Returns Array of matching Components, or empty Array.

Basic Component lookup

Components can be retrieved by using their Ext.Component:

  • component
  • gridpanel

Matching by xtype matches inherited types, so in the following code, the previous field of any type which inherits from TextField will be found:

prevField = myField.previousNode('textfield');

To match only the exact type, pass the "shallow" flag by adding (true) to xtype (See Component's isXType method):

prevTextField = myField.previousNode('textfield(true)');

You can search Components by their id or itemId property, prefixed with a #:

#myContainer

Component xtype and id or itemId can be used together to avoid possible id collisions between Components of different types:

panel#myPanel

When Component's id or xtype contains dots, you can escape them in your selector:

my\.panel#myPanel

Keep in mind that JavaScript treats the backslash character in a special way, so you need to escape it, too, in the actual code:

var myPanel = Ext.ComponentQuery.query('my\\.panel#myPanel');

Traversing Component tree

Components can be found by their relation to other Components. There are several relationship operators, mostly taken from CSS selectors:

  • E F All descendant Components of E that match F
  • E > F All direct children Components of E that match F
  • E ^ F All parent Components of E that match F

Expressions between relationship operators are matched left to right, i.e. leftmost selector is applied first, then if one or more matches are found, relationship operator itself is applied, then next selector expression, etc. It is possible to combine relationship operators in complex selectors:

window[title="Input form"] textfield[name=login] ^ form > button[action=submit]

That selector can be read this way: Find a window with title "Input form", in that window find a TextField with name "login" at any depth (including subpanels and/or FieldSets), then find an Ext.form.Panel that is a parent of the TextField, and in that form find a direct child that is a button with custom property action set to value "submit".

Whitespace on both sides of ^ and > operators is non-significant, i.e. can be omitted, but usually is used for clarity.

Searching by Component attributes

Components can be searched by their object property values (attributes). To do that, use attribute matching expression in square brackets:

  • component[disabled] - matches any Component that has disabled property with any truthy (non-empty, not false) value.
  • panel[title="Test"] - matches any Component that has title property set to "Test". Note that if the value does not contain spaces, the quotes are optional.

Attributes can use any of the following operators to compare values: =, !=, ^=, $=, *=, %=, |= and ~=.

Prefixing the attribute name with an at sign @ means that the property must be the object's ownProperty, not a property from the prototype chain.

Specifications like [propName] check that the property is a truthy value. To check that the object has an ownProperty of a certain name, regardless of the value use the form [?propName].

The specified value is coerced to match the type of the property found in the candidate Component using Ext#coerce.

If you need to find Components by their itemId property, use the #id form; it will do the same as [itemId=id] but is easier to read.

If you need to include a metacharacter like (, ), [, ], etc., in the query, escape it by prefixing it with a backslash:

 var component = Ext.ComponentQuery.query('[myProperty=\\[foo\\]]');

Attribute matching operators

The '=' operator will return the results that exactly match the specified object property (attribute):

Ext.ComponentQuery.query('panel[cls=my-cls]');

Will match the following Component:

Ext.create('Ext.window.Window', {
    cls: 'my-cls'
});

But will not match the following Component, because 'my-cls' is one value among others:

 Ext.create('Ext.panel.Panel', {
     cls: 'foo-cls my-cls bar-cls'
 });

You can use the '~=' operator instead, it will return Components with the property that exactly matches one of the whitespace-separated values. This is also true for properties that only have one value:

Ext.ComponentQuery.query('panel[cls~=my-cls]');

Will match both Components:

Ext.create('Ext.panel.Panel', {
    cls: 'foo-cls my-cls bar-cls'
});

Ext.create('Ext.window.Window', {
    cls: 'my-cls'
});

Generally, '=' operator is more suited for object properties other than CSS classes, while '~=' operator will work best with properties that hold lists of whitespace-separated CSS classes.

The '^=' operator will return Components with specified attribute that start with the passed value:

Ext.ComponentQuery.query('panel[title^=Sales]');

Will match the following Component:

Ext.create('Ext.panel.Panel', {
    title: 'Sales estimate for Q4'
});

The '$=' operator will return Components with specified properties that end with the passed value:

Ext.ComponentQuery.query('field[fieldLabel$=name]');

Will match the following Component:

Ext.create('Ext.form.field.Text', {
    fieldLabel: 'Enter your name'
});

The '/=' operator will return Components with specified properties that match the passed regular expression:

Ext.ComponentQuery.query('button[action/="edit|save"]');

Will match the following Components with a custom action property:

Ext.create('Ext.button.Button', {
     action: 'edit'
});

Ext.create('Ext.button.Button', {
     action: 'save'
});

When you need to use meta characters like [], (), etc. in your query, make sure to escape them with back slashes:

Ext.ComponentQuery.query('panel[title="^Sales for Q\\[1-4\\]"]');

The following test will find panels with their ownProperty collapsed being equal to false. It will not match a collapsed property from the prototype chain.

Ext.ComponentQuery.query('panel[@collapsed=false]');

Member expressions from candidate Components may be tested. If the expression returns a truthy value, the candidate Component will be included in the query:

var disabledFields = myFormPanel.query("{isDisabled()}");

Such expressions are executed in Component's context, and the above expression is similar to running this snippet for every Component in your application:

 if (component.isDisabled()) {
     matches.push(component);
 }

It is important to use only methods that are available in every Component instance to avoid run time exceptions. If you need to match your Components with a custom condition formula, you can augment Ext.Component to provide custom matcher that will return false by default, and override it in your custom classes:

 Ext.define('My.Component', {
     override: 'Ext.Component',
     myMatcher: function() { return false; }
 });

 Ext.define('My.Panel', {
     extend: 'Ext.panel.Panel',
     requires: ['My.Component'],     // Ensure that Component override is applied
     myMatcher: function(selector) {
         return selector === 'myPanel';
     }
 });

After that you can use a selector with your custom matcher to find all instances of My.Panel:

 Ext.ComponentQuery.query("{myMatcher('myPanel')}");

However if you really need to use a custom matcher, you may find it easier to implement a custom Pseudo class instead (see below).

Conditional matching

Attribute matchers can be combined to select only Components that match all conditions (logical AND operator):

Ext.ComponentQuery.query('panel[cls~=my-cls][floating=true][title$="sales data"]');

E.g., the query above will match only a Panel-descended Component that has 'my-cls' CSS class and is floating and with a title that ends with "sales data".

Expressions separated with commas will match any Component that satisfies either expression (logical OR operator):

Ext.ComponentQuery.query('field[fieldLabel^=User], field[fieldLabel*=password]');

E.g., the query above will match any field with field label starting with "User", or any field that has "password" in its label.

If you need to include a comma in an attribute matching expression, escape it with a backslash:

Ext.ComponentQuery.query('field[fieldLabel^="User\\, foo"], field[fieldLabel*=password]');

Pseudo classes

Pseudo classes may be used to filter results in the same way as in Ext.dom.Query. There are five default pseudo classes:

  • not Negates a selector.
  • first Filters out all except the first matching item for a selector.
  • last Filters out all except the last matching item for a selector.
  • focusable Filters out all except Components which by definition and configuration are potentially able to recieve focus, regardless of their current state
  • canfocus Filters out all except Components which are curently able to recieve focus. That is, they are defined and configured focusable, and they are also visible and enabled.
  • nth-child Filters Components by ordinal position in the selection.
  • scrollable Filters out all except Components which are scrollable.
  • visible Filters out hidden Components. May test deep visibility using ':visible(true)'

These pseudo classes can be used with other matchers or without them:

 // Select first direct child button in any panel
 Ext.ComponentQuery.query('panel > button:first');

 // Select last field in Profile form
 Ext.ComponentQuery.query('form[title=Profile] field:last');

 // Find first focusable Component in a panel and focus it
 panel.down(':canfocus').focus();

 // Select any field that is not hidden in a form
 form.query('field:not(hiddenfield)');

 // Find last scrollable Component and reset its scroll positions.
 tabpanel.down(':scrollable[hideMode=display]:last').getScrollable().scrollTo(0, 0);

Pseudo class nth-child can be used to find any child Component by its position relative to its siblings. This class' handler takes one argument that specifies the selection formula as Xn or Xn+Y:

 // Find every odd field in a form
 form.query('field:nth-child(2n+1)'); // or use shortcut: :nth-child(odd)

 // Find every even field in a form
 form.query('field:nth-child(2n)');   // or use shortcut: :nth-child(even)

 // Find every 3rd field in a form
 form.query('field:nth-child(3n)');

Note: The nth-child selector returns 1-based result sets.

Pseudo classes can be combined to further filter the results, e.g., in the form example above we can modify the query to exclude hidden fields:

 // Find every 3rd non-hidden field in a form
 form.query('field:not(hiddenfield):nth-child(3n)');

Note that when combining pseudo classes, whitespace is significant, i.e. there should be no spaces between pseudo classes. This is a common mistake; if you accidentally type a space between field and :not, the query will not return any result because it will mean "find field's children Components that are not hidden fields...".

Custom pseudo classes

It is possible to define your own custom pseudo classes. In fact, a pseudo class is just a property in Ext.ComponentQuery.pseudos object that defines pseudo class name (property name) and pseudo class handler (property value):

// Function receives array and returns a filtered array.
Ext.ComponentQuery.pseudos.invalid = function(items) {
    var i = 0, l = items.length, c, result = [];
    for (; i < l; i++) {
        if (!(c = items[i]).isValid()) {
            result.push(c);
        }
    }
    return result;
};

var invalidFields = myFormPanel.query('field:invalid');
if (invalidFields.length) {
    invalidFields[0].getEl().scrollIntoView(myFormPanel.body);
    for (var i = 0, l = invalidFields.length; i < l; i++) {
        invalidFields[i].getEl().frame("red");
    }
}

Pseudo class handlers can be even more flexible, with a selector argument used to define the logic:

 // Handler receives array of itmes and selector in parentheses
 Ext.ComponentQuery.pseudos.titleRegex = function(components, selector) {
     var i = 0, l = components.length, c, result = [], regex = new RegExp(selector);
     for (; i < l; i++) {
         c = components[i];
         if (c.title && regex.test(c.title)) {
             result.push(c);
         }
     }
     return result;
 }

 var salesTabs = tabPanel.query('panel:titleRegex("sales\\s+for\\s+201[123]")');

Be careful when using custom pseudo classes with MVC Controllers: when you use a pseudo class in Controller's control or listen component selectors, the pseudo class' handler function will be called very often and may slow down your application significantly. A good rule of thumb is to always specify Component xtype with the pseudo class so that the handlers are only called on Components that you need, and try to make the condition checks as cheap in terms of execution time as possible. Note how in the example above, handler function checks that Component has a title first, before running regex test on it.

Query examples

Queries return an array of Components. Here are some example queries:

// retrieve all Ext.Panels in the document by xtype
var panelsArray = Ext.ComponentQuery.query('panel');

// retrieve all Ext.Panels within the container with an id myCt
var panelsWithinmyCt = Ext.ComponentQuery.query('#myCt panel');

// retrieve all direct children which are Ext.Panels within myCt
var directChildPanel = Ext.ComponentQuery.query('#myCt > panel');

// retrieve all grids or trees
var gridsAndTrees = Ext.ComponentQuery.query('gridpanel, treepanel');

// Focus first Component
myFormPanel.child(':canfocus').focus();

// Retrieve every odd text field in a form
myFormPanel.query('textfield:nth-child(odd)');

// Retrieve every even field in a form, excluding hidden fields
myFormPanel.query('field:not(hiddenfield):nth-child(even)');

// Retrieve every scrollable in a tabpanel
tabpanel.query(':scrollable');

For easy access to queries based from a particular Container see the Ext.container.Container#query, Ext.container.Container#down and Ext.container.Container#child methods. Also see Ext.Component#up.

No members found using the current filters

properties

Instance Properties

$className
private pri

Defaults to:

'Ext.Base'

$configPrefixed : Boolean
private pri

The value true causes config values to be stored on instances using a property name prefixed with an underscore ("_") character. A value of false stores config values as properties using their exact name (no prefix).

Defaults to:

true

Available since: 5.0.0

$configStrict : Boolean
private pri

The value true instructs the initConfig method to only honor values for properties declared in the config block of a class. When false, properties that are not declared in a config block will be placed on the instance.

Defaults to:

true

Available since: 5.0.0

cache
private pri

Cache of selectors and matching ComponentQuery.Query objects

Defaults to:

new Ext.util.LruCache({
    maxSize: 100
})

clearPropertiesOnDestroy : Boolean / "async"
protected pro

Setting this property to false will prevent nulling object references on a Class instance after destruction. Setting this to "async" will delay the clearing for approx 50ms.

Defaults to:

true

Available since: 6.2.0

clearPrototypeOnDestroy : Boolean
private pri

Setting this property to true will result in setting the object's prototype to null after the destruction sequence is fully completed. After that, most attempts at calling methods on the object instance will result in "method not defined" exception. This can be very helpful with tracking down otherwise hard to find bugs like runaway Ajax requests, timed functions not cleared on destruction, etc.

Note that this option can only work in browsers that support Object.setPrototypeOf method, and is only available in debugging mode.

Defaults to:

false

Available since: 6.2.0

destroyed : Boolean
protected pro

This property is set to true after the destroy method is called.

Defaults to:

false

isConfiguring : Boolean
readonly ro protected pro

This property is set to true during the call to initConfig.

Defaults to:

false

Available since: 5.0.0

isFirstInstance : Boolean
readonly ro protected pro

This property is set to true if this instance is the first of its class.

Defaults to:

false

Available since: 5.0.0

isInstance : Boolean
readonly ro protected pro

This value is true and is used to identify plain objects from instances of a defined class.

Defaults to:

true

pseudos
private pri

Cache of pseudo class filter functions

Defaults to:

{
    not: function(components, selector) {
        var i = 0,
            length = components.length,
            results = [],
            index = -1,
            component;
        for (; i < length; ++i) {
            component = components[i];
            if (!cq.is(component, selector)) {
                results[++index] = component;
            }
        }
        return results;
    },
    first: function(components) {
        var ret = [];
        if (components.length > 0) {
            ret.push(components[0]);
        }
        return ret;
    },
    last: function(components) {
        var len = components.length,
            ret = [];
        if (len > 0) {
            ret.push(components[len - 1]);
        }
        return ret;
    },
    // This filters for components which by definition and configuration are
    // theoretically focusable. It does not take into account the current app state.
    focusable: function(cmps) {
        var len = cmps.length,
            results = [],
            i = 0,
            c;
        for (; i < len; i++) {
            c = cmps[i];
            if (c.isFocusable && c.isFocusable()) {
                results.push(c);
            }
        }
        return results;
    },
    // This filters for components which are currently able to recieve focus.
    canfocus: function(cmps, value) {
        var len = cmps.length,
            results = [],
            i = 0,
            c;
        for (; i < len; i++) {
            c = cmps[i];
            if (c.canFocus && c.canFocus(false, value)) {
                results.push(c);
            }
        }
        return results;
    },
    "nth-child": function(c, a) {
        var result = [],
            m = nthRe.exec(a === "even" && "2n" || a === "odd" && "2n+1" || !nthRe2.test(a) && "n+" + a || a),
            f = (m[1] || 1) - 0,
            len = m[2] - 0,
            i, n, nodeIndex;
        for (i = 0; n = c[i]; i++) {
            // jshint ignore:line
            nodeIndex = i + 1;
            if (f === 1) {
                if (len === 0 || nodeIndex === len) {
                    result.push(n);
                }
            } else if ((nodeIndex + len) % f === 0) {
                result.push(n);
            }
        }
        return result;
    },
    scrollable: function(cmps) {
        var len = cmps.length,
            results = [],
            i = 0,
            c;
        for (; i < len; i++) {
            c = cmps[i];
            // Note that modern toolkit prefixes with an underscore.
            if (c.scrollable || c._scrollable) {
                results.push(c);
            }
        }
        return results;
    },
    visible: function(cmps, deep) {
        deep = deep === 'true';
        var len = cmps.length,
            results = [],
            i = 0,
            c;
        for (; i < len; i++) {
            c = cmps[i];
            // Note that modern toolkit prefixes with an underscore.
            if (c.isVisible(deep)) {
                results.push(c);
            }
        }
        return results;
    }
}

self : Ext.Class
protected pro

Get the reference to the current class from which this object was instantiated. Unlike Ext.Base#statics, this.self is scope-dependent and it's meant to be used for dynamic inheritance. See Ext.Base#statics for a detailed comparison

Ext.define('My.Cat', {
    statics: {
        speciesName: 'Cat' // My.Cat.speciesName = 'Cat'
    },

    constructor: function() {
        alert(this.self.speciesName); // dependent on 'this'
    },

    clone: function() {
        return new this.self();
    }
});


Ext.define('My.SnowLeopard', {
    extend: 'My.Cat',
    statics: {
        speciesName: 'Snow Leopard'         // My.SnowLeopard.speciesName = 'Snow Leopard'
    }
});

var cat = new My.Cat();                     // alerts 'Cat'
var snowLeopard = new My.SnowLeopard();     // alerts 'Snow Leopard'

var clone = snowLeopard.clone();
alert(Ext.getClassName(clone));             // alerts 'My.SnowLeopard'

Defaults to:

Base

Static Properties

$onExtended
static sta private pri

Defaults to:

[]

methods

Instance Methods

_visit ( preOrder, selector, root, fn, scope, extraArgs ) : Boolean
private pri

Visit implementation which handles both preOrder and postOrder modes.

Parameters

preOrder :  Object

selector :  Object

root :  Object

fn :  Object

scope :  Object

extraArgs :  Object

Returns

:Boolean

addDeprecations ( deprecations )
private pri

This method applies a versioned, deprecation declaration to this class. This is typically called by the deprecated config.

Parameters

deprecations :  Object

callOverridden ( args ) : Object
deprecated dep protected pro

Call the original method that was previously overridden with Ext.Base#override

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

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

        this.callOverridden();

        alert("Meeeeoooowwww");
    }
});

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

Parameters

args :  Array/Arguments

The arguments, either an array or the arguments object from the current method, for example: this.callOverridden(arguments)

Returns

:Object

Returns the result of calling the overridden method

Deprecated since version 4.1.0

callParent ( args ) : Object
protected pro

Call the "parent" method of the current method. That is the method previously overridden by derivation or by an override (see Ext#define).

 Ext.define('My.Base', {
     constructor: function (x) {
         this.x = x;
     },

     statics: {
         method: function (x) {
             return x;
         }
     }
 });

 Ext.define('My.Derived', {
     extend: 'My.Base',

     constructor: function () {
         this.callParent([21]);
     }
 });

 var obj = new My.Derived();

 alert(obj.x);  // alerts 21

This can be used with an override as follows:

 Ext.define('My.DerivedOverride', {
     override: 'My.Derived',

     constructor: function (x) {
         this.callParent([x*2]); // calls original My.Derived constructor
     }
 });

 var obj = new My.Derived();

 alert(obj.x);  // now alerts 42

This also works with static and private methods.

 Ext.define('My.Derived2', {
     extend: 'My.Base',

     // privates: {
     statics: {
         method: function (x) {
             return this.callParent([x*2]); // calls My.Base.method
         }
     }
 });

 alert(My.Base.method(10));     // alerts 10
 alert(My.Derived2.method(10)); // alerts 20

Lastly, it also works with overridden static methods.

 Ext.define('My.Derived2Override', {
     override: 'My.Derived2',

     // privates: {
     statics: {
         method: function (x) {
             return this.callParent([x*2]); // calls My.Derived2.method
         }
     }
 });

 alert(My.Derived2.method(10); // now alerts 40

To override a method and replace it and also call the superclass method, use method-callSuper. This is often done to patch a method to fix a bug.

Parameters

args :  Array/Arguments

The arguments, either an array or the arguments object from the current method, for example: this.callParent(arguments)

Returns

:Object

Returns the result of calling the parent method

callSuper ( args ) : Object
protected pro

This method is used by an override to call the superclass method but bypass any overridden method. This is often done to "patch" a method that contains a bug but for whatever reason cannot be fixed directly.

Consider:

 Ext.define('Ext.some.Class', {
     method: function () {
         console.log('Good');
     }
 });

 Ext.define('Ext.some.DerivedClass', {
     extend: 'Ext.some.Class',

     method: function () {
         console.log('Bad');

         // ... logic but with a bug ...

         this.callParent();
     }
 });

To patch the bug in Ext.some.DerivedClass.method, the typical solution is to create an override:

 Ext.define('App.patches.DerivedClass', {
     override: 'Ext.some.DerivedClass',

     method: function () {
         console.log('Fixed');

         // ... logic but with bug fixed ...

         this.callSuper();
     }
 });

The patch method cannot use method-callParent to call the superclass method since that would call the overridden method containing the bug. In other words, the above patch would only produce "Fixed" then "Good" in the console log, whereas, using callParent would produce "Fixed" then "Bad" then "Good".

Parameters

args :  Array/Arguments

The arguments, either an array or the arguments object from the current method, for example: this.callSuper(arguments)

Returns

:Object

Returns the result of calling the superclass method

destroy

This method is called to cleanup an object and its resources. After calling this method, the object should not be used any further in any way, including access to its methods and properties.

To prevent potential memory leaks, all object references will be nulled at the end of destruction sequence, unless clearPropertiesOnDestroy is set to false.

getConfig ( [name], [peek] ) : Object

Returns a specified config property value. If the name parameter is not passed, all current configuration options will be returned as key value pairs.

Parameters

name :  String (optional)

The name of the config property to get.

peek :  Boolean (optional)

true to peek at the raw value without calling the getter.

Defaults to: false

Returns

:Object

The config property value.

getInitialConfig ( [name] ) : Object/Mixed

Returns the initial configuration passed to the constructor when instantiating this class.

Given this example Ext.button.Button definition and instance:

Ext.define('MyApp.view.Button', {
    extend: 'Ext.button.Button',
    xtype: 'mybutton',

    scale: 'large',
    enableToggle: true
});

var btn = Ext.create({
    xtype: 'mybutton',
    renderTo: Ext.getBody(),
    text: 'Test Button'
});

Calling btn.getInitialConfig() would return an object including the config options passed to the create method:

xtype: 'mybutton',
renderTo: // The document body itself
text: 'Test Button'

Calling btn.getInitialConfig('text')returns 'Test Button'.

Parameters

name :  String (optional)

Name of the config option to return.

Returns

:Object/Mixed

The full config object or a single config value when name parameter specified.

hasConfig ( name )
private pri

Parameters

name :  String

initConfig ( instanceConfig ) : Ext.Base
chainable ch protected pro

Initialize configuration for this class. a typical example:

Ext.define('My.awesome.Class', {
    // The default config
    config: {
        name: 'Awesome',
        isAwesome: true
    },

    constructor: function(config) {
        this.initConfig(config);
    }
});

var awesome = new My.awesome.Class({
    name: 'Super Awesome'
});

alert(awesome.getName()); // 'Super Awesome'

Parameters

instanceConfig :  Object

Returns

:Ext.Base

this

is ( component, selector, [root] ) : Boolean

Tests whether the passed Component matches the selector string. An empty selector will always match.

Parameters

component :  Ext.Component

The Component to test

selector :  String

The selector string to test against.

root :  Ext.Component (optional)

The root component.

Defaults to: null

Returns

:Boolean

True if the Component matches the selector.

query ( selector, [root] ) : Ext.Component[]

Returns an array of matched Components from within the passed root object.

This method filters returned Components in a similar way to how CSS selector based DOM queries work using a textual selector string.

See class summary for details.

Parameters

selector :  String

The selector string to filter returned Components.

root :  Ext.Container (optional)

The Container within which to perform the query. If omitted, all Components within the document are included in the search.

This parameter may also be an array of Components to filter according to the selector.

Returns

:Ext.Component[]

The matched Components.

setConfig ( name, [value] ) : Ext.Base
chainable ch

Sets a single/multiple configuration options.

Parameters

name :  String/Object

The name of the property to set, or a set of key value pairs to set.

value :  Object (optional)

The value to set for the name parameter.

Returns

:Ext.Base

this

statics Ext.Class
protected pro

Get the reference to the class from which this object was instantiated. Note that unlike Ext.Base#self, this.statics() is scope-independent and it always returns the class from which it was called, regardless of what this points to during run-time

Ext.define('My.Cat', {
    statics: {
        totalCreated: 0,
        speciesName: 'Cat' // My.Cat.speciesName = 'Cat'
    },

    constructor: function() {
        var statics = this.statics();

        alert(statics.speciesName);     // always equals to 'Cat' no matter what 'this' refers to
                                        // equivalent to: My.Cat.speciesName

        alert(this.self.speciesName);   // dependent on 'this'

        statics.totalCreated++;
    },

    clone: function() {
        var cloned = new this.self();   // dependent on 'this'

        cloned.groupName = this.statics().speciesName;   // equivalent to: My.Cat.speciesName

        return cloned;
    }
});


Ext.define('My.SnowLeopard', {
    extend: 'My.Cat',

    statics: {
        speciesName: 'Snow Leopard'     // My.SnowLeopard.speciesName = 'Snow Leopard'
    },

    constructor: function() {
        this.callParent();
    }
});

var cat = new My.Cat();                 // alerts 'Cat', then alerts 'Cat'

var snowLeopard = new My.SnowLeopard(); // alerts 'Cat', then alerts 'Snow Leopard'

var clone = snowLeopard.clone();
alert(Ext.getClassName(clone));         // alerts 'My.SnowLeopard'
alert(clone.groupName);                 // alerts 'Cat'

alert(My.Cat.totalCreated);             // alerts 3

Returns

:Ext.Class

visitPostOrder ( selector, root, fn, [scope], [extraArgs] )

Traverses the tree rooted at the passed root in post-order mode, calling the passed function on the nodes at each level. That is the function is called upon each node after being called on its children).

For an object to be queryable, it must implement the getRefItems method which returns all immediate child items.

This method is used at each level down the cascade. Currently Ext.Components and Ext.data.TreeModels are queryable.

If you have tree-structured data, you can make your nodes queryable, and use ComponentQuery on them.

Parameters

selector :  Object

A ComponentQuery selector used to filter candidate nodes before calling the function. An empty string matches any node.

root :  String

The root queryable object to start from.

fn :  Function

The function to call. Return false to abort the traverse.

node :  Object

The node being visited.

scope :  Object (optional)

The context (this reference) in which the function is executed.

extraArgs :  Array (optional)

A set of arguments to be appended to the function's argument list to pass down extra data known to the caller after the node being visited.

visitPreOrder ( selector, root, fn, [scope], [extraArgs] )

Traverses the tree rooted at the passed root in pre-order mode, calling the passed function on the nodes at each level. That is the function is called upon each node before being called on its children).

For an object to be queryable, it must implement the getRefItems method which returns all immediate child items.

This method is used at each level down the cascade. Currently Ext.Components and Ext.data.TreeModels are queryable.

If you have tree-structured data, you can make your nodes queryable, and use ComponentQuery on them.

Parameters

selector :  Object

A ComponentQuery selector used to filter candidate nodes before calling the function. An empty string matches any node.

root :  String

The root queryable object to start from.

fn :  Function

The function to call. Return false to abort the traverse.

node :  Object

The node being visited.

scope :  Object (optional)

The context (this reference) in which the function is executed.

extraArgs :  Array (optional)

A set of arguments to be appended to the function's argument list to pass down extra data known to the caller after the node being visited.

Static Methods

addConfig ( config, [mixinClass] )
static sta private pri

Adds new config properties to this class. This is called for classes when they are declared, then for any mixins that class may define and finally for any overrides defined that target the class.

Parameters

config :  Object

mixinClass :  Ext.Class (optional)

The mixin class if the configs are from a mixin.

addInheritableStatics ( members ) :
chainable ch static sta private pri

Parameters

members :  Object

Returns

:

addMember ( name, member ) :
chainable ch static sta private pri

Parameters

name :  Object

member :  Object

Returns

:

addMembers ( members, [isStatic], [privacy] ) :
chainable ch static sta

Add methods / properties to the prototype of this class.

Ext.define('My.awesome.Cat', {
    constructor: function() {
        ...
    }
});

 My.awesome.Cat.addMembers({
     meow: function() {
        alert('Meowww...');
     }
 });

 var kitty = new My.awesome.Cat();
 kitty.meow();

Parameters

members :  Object

The members to add to this class.

isStatic :  Boolean (optional)

Pass true if the members are static.

Defaults to: false

privacy :  Boolean (optional)

Pass true if the members are private. This only has meaning in debug mode and only for methods.

Defaults to: false

Returns

:

addStatics ( members ) : Ext.Base
chainable ch static sta

Add / override static properties of this class.

Ext.define('My.cool.Class', {
    ...
});

My.cool.Class.addStatics({
    someProperty: 'someValue',      // My.cool.Class.someProperty = 'someValue'
    method1: function() { ... },    // My.cool.Class.method1 = function() { ... };
    method2: function() { ... }     // My.cool.Class.method2 = function() { ... };
});

Parameters

members :  Object

Returns

:Ext.Base

this

borrow ( fromClass, members ) : Ext.Base
static sta private pri

Borrow another class' members to the prototype of this class.

Ext.define('Bank', {
    money: '$$$',
    printMoney: function() {
        alert('$$$$$$$');
    }
});

Ext.define('Thief', {
    ...
});

Thief.borrow(Bank, ['money', 'printMoney']);

var steve = new Thief();

alert(steve.money); // alerts '$$$'
steve.printMoney(); // alerts '$$$$$$$'

Parameters

fromClass :  Ext.Base

The class to borrow members from

members :  Array/String

The names of the members to borrow

Returns

:Ext.Base

this

callParent ( args )
static sta protected pro

Parameters

args :  Object

callSuper ( args )
static sta protected pro

Parameters

args :  Object

create Object
static sta

Create a new instance of this Class.

Ext.define('My.cool.Class', {
    ...
});

My.cool.Class.create({
    someConfig: true
});

All parameters are passed to the constructor of the class.

Returns

:Object

the created instance.

createAlias ( alias, origin )
static sta

Create aliases for existing prototype methods. Example:

Ext.define('My.cool.Class', {
    method1: function() { ... },
    method2: function() { ... }
});

var test = new My.cool.Class();

My.cool.Class.createAlias({
    method3: 'method1',
    method4: 'method2'
});

test.method3(); // test.method1()

My.cool.Class.createAlias('method5', 'method3');

test.method5(); // test.method3() -> test.method1()

Parameters

alias :  String/Object

The new method name, or an object to set multiple aliases. See flexSetter

origin :  String/Object

The original method name

extend ( parentClass )
static sta private pri

Parameters

parentClass :  Object

getConfigurator Ext.Configurator
static sta private pri

Returns the Ext.Configurator for this class.

Returns

:Ext.Configurator

getName String
static sta

Get the current class' name in string format.

Ext.define('My.cool.Class', {
    constructor: function() {
        alert(this.self.getName()); // alerts 'My.cool.Class'
    }
});

My.cool.Class.getName(); // 'My.cool.Class'

Returns

:String

className

mixin ( name, mixinClass ) :
chainable ch static sta private pri

Used internally by the mixins pre-processor

Parameters

name :  Object

mixinClass :  Object

Returns

:

onExtended ( fn, scope ) :
chainable ch static sta private pri

Parameters

fn :  Object

scope :  Object

Returns

:

override ( members ) : Ext.Base
chainable ch 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!");
    }
});

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

        this.callParent(arguments);

        alert("Meeeeoooowwww");
    }
});

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!");

        this.callParent(arguments);

        alert("Meeeeoooowwww");
    }
});

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).

Parameters

members :  Object

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

Returns

:Ext.Base

this class

triggerExtended
static sta private pri

Ext JS 6.2.1 - Modern Toolkit