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.
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.
Public classes and class members are available for use by any other class or application code and may be relied upon as a stable and persistent within major product versions. Public classes and members may safely be extended via a subclass.
Protected class members are stable public members intended to be used by the
owning class or its subclasses. Protected members may safely be extended via a subclass.
Private classes and class members are used internally by the framework and are not intended to be used by application developers. Private classes and members may change or be omitted from the framework at any time without notice and should not be relied upon in application logic.
static label next to the
method name. *See Static below.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).
Let's look at each part of the member row:
lookupComponent in this example)( item ) in this example)Ext.Component in this case). This may be omitted for methods that do not
return anything other than undefined or may display as multiple possible values
separated by a forward slash / signifying that what is returned may depend on the
results of the method call (i.e. a method may return a Component if a get method calls is
successful or false if unsuccessful which would be displayed as
Ext.Component/Boolean).PROTECTED in
this example - see the Flags section below)Ext.container.Container in this example). The source
class will be displayed as a blue link if the member originates from the current class
and gray if it is inherited from an ancestor or mixed-in class.view source in the example)item : Object in the example).undefined a "Returns" section
will note the type of class or object returned and a description (Ext.Component in the
example)Available since 3.4.0 - not pictured in
the example) just after the member descriptionDefaults to: false)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.
classInstance.method1().method2().etc();false is returned from
an event handler- 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
- 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
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.
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.
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.
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.
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:
Ext.button.Button class has an alternate class name of Ext.Button). Alternate class
names are commonly maintained for backward compatibility.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.
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:
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.
This class manages models and their associations. Instances of Session are typically
associated with some Component (perhaps the Viewport or a Window) and then used by
their Ext.app.ViewModel to enable data binding.
The primary job of a Session is to manage a collection of records of many different types and their associations. This often starts by loading records when requested (via bind - see below) and culminates when it is time to save to the server.
Because the Session tracks all records it loads, it ensures that for any given type of
model, only one record exists with a given id. This means that all edits of that
record are properly targeted at that one instance.
Similarly, when associations are loaded, the Ext.data.Store created to hold the
associated records is tracked by the Session. So all requests for the "OrderItems" of
a particular Order id will result in the same Store. Adding and removing items from
that Order then is sure to remain consistent.
Since the Session is managing all this data, there are several methods it provides
to give convenient access to that data. The most important of these is update and
getChanges.
The update and getChanges methods both operate on object that contains a summary
of records and associations and different CRUD operations.
There are two basic ways to save the contents of a Session: getChanges and
getSaveBatch. We've already seen getChanges. The data contained in the CRUD object
can be translated into whatever shape is needed by the server.
To leverage the proxy facilities defined by each Model
class, there is the getSaveBatch method. That method returns an Ext.data.Batch
object populated with the necessary create, update and destory operations to
save all of the changes in the Session.
true to automatically destroy this session when a component it is attached
to is destroyed. This should be set to false if the session is intended to be
used across multiple root level components.
Defaults to:
true
Available since: 5.0.1
Defaults to:
'default'
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
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
This property is set to true during the call to initConfig.
Defaults to:
false
Available since: 5.0.0
This property is set to true if this instance is the first of its class.
Defaults to:
false
Available since: 5.0.0
This value is true and is used to identify plain objects from instances of
a defined class.
Defaults to:
true
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
Add a record instance to this session. Called by model.
record : Ext.data.Model
The record.
This method applies a versioned, deprecation declaration to this class. This
is typically called by the deprecated config.
deprecations : Object
Adds an existing record instance to the session. The record may not belong to another session. The record cannot be a phantom record, instead use createRecord.
record : Ext.data.Model
The record to adopt.
Template method, will be called by Model after a record is dropped.
record : Ext.data.Model
The record.
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 methods.
Ext.define('My.Derived2', {
extend: 'My.Base',
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',
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 callSuper. This is often done to patch a method to fix a bug.
args : Array/Arguments
The arguments, either an array or the arguments object
from the current method, for example: this.callParent(arguments)
Returns the result of calling the parent method
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 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".
args : Array/Arguments
The arguments, either an array or the arguments object
from the current method, for example: this.callSuper(arguments)
Returns the result of calling the superclass method
Checks if the model type being referenced is valid for this session. That includes checking if the model name is correct & is one used in this schema for this session. Will raise an exception if the model type is not correct.
name : String/Ext.Class
The model name or model type.
Marks the session as "clean" by calling Ext.data.Model#commit on each record that is known to the session.
Available since: 5.1.0
Process a create block of entities from the update method.
entityType : Ext.Class
The entity type.
items : Object[]
The data objects to create.
Creates a new record and tracks it in this session.
type : String/Ext.Class
The entityName or the actual class of record to create.
data : Object (optional)
The data for the record.
The new record.
This method is called to cleanup an object and its resources. After calling this method, the object should not be used any further.
Process a drop block for entities from the update method.
entityType : Ext.Class
The entity type.
ids : Object[]
The identifiers of the items to drop.
Remove a record and any references from the session.
record : Ext.data.Model
The record
Returns an object describing all of the modified fields, created or dropped records and many-to-many association changes maintained by this session.
An object in the CRUD format (see the intro docs). null if there are no changes.
The same functionality as getChanges, however we also take into account our parent session.
An object in the CRUD format (see the intro docs). null if there are no changes.
Returns a specified config property value. If the name parameter is not passed, all current configuration options will be returned as key value pairs.
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
The config property value.
Transforms a list of ids into a list of records for a particular type.
entityType : Ext.Class
The entity type.
ids : Object[]
The ids to transform.
The models corresponding to the ids.
Return an entry for the data property for a particular type/id.
type : String/Ext.Class
The entity name or model type.
id : Object
The id of the record
The data entry.
Returns the initial configuration passed to constructor when instantiating this class.
name : String (optional)
Name of the config option to return.
The full config object or a single config value
when name parameter specified.
Gets a user friendly identifier for a Model.
entityType : Ext.Class
The entity type.
id : Object
The id of the entity.
The identifier.
Get a cached record from the session. If the record does not exist, it will
be created. If the autoLoad parameter is not set to false, the record will
be loaded via the proxy of the Model.
If this session is configured with a parent session, a copy of any existing record
in the parent will be adopted into this session. If the parent does not contain the record,
the record will be created and not inserted into the parent.
See also peekRecord.
type : String/Ext.Class
The entityName or the actual class of record to create.
id : Object
The id of the record.
autoLoad : Boolean/Object (optional)
false to prevent the record from being loaded if
it does not exist. If this parameter is an object, it will be passed to the Ext.data.Model#load call.
Defaults to: true
The record.
Returns an Ext.data.Batch containing the Ext.data.operation.Operation instances
that are needed to save all of the changes in this session. This sorting is based
on operation type, associations and foreign keys. Generally speaking the operations
in the batch can be committed to a server sequentially and the server will never be
sent a request with an invalid (client-generated) id in a foreign key field.
sort : Boolean (optional)
Pass false to disable the batch operation sort.
Defaults to: true
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'
instanceConfig : Object
this
Adds a "destroyable" object to an internal list of objects that will be destroyed
when this instance is destroyed (via destroy).
name : String
value : Object
The value passed.
Triggered when an associated item from update references a record that does not exist in the session.
entityType : Ext.Class
The entity type.
id : Object
The id of the model.
This is a template method. a hook into the functionality of this class. Feel free to override it in child classes.
Triggered when an drop block from update tries to create a record that already exists.
entityType : Ext.Class
The entity type.
id : Object
The id of the model.
This is a template method. a hook into the functionality of this class. Feel free to override it in child classes.
Triggered when an drop block from update references a record that does not exist in the session.
entityType : Ext.Class
The entity type.
id : Object
The id of the model.
This is a template method. a hook into the functionality of this class. Feel free to override it in child classes.
Triggered when an drop block from update tries to create a record that already exists.
entityType : Ext.Class
The entity type.
id : Object
The id of the model.
This is a template method. a hook into the functionality of this class. Feel free to override it in child classes.
Triggered when an update block from update references a record that does not exist in the session.
entityType : Ext.Class
The entity type.
id : Object
The id of the model.
dropped : Boolean
true if the record was dropped.
This is a template method. a hook into the functionality of this class. Feel free to override it in child classes.
Gets an existing record from the session. The record will not be created if it does not exist.
See also: getRecord.
type : String/Ext.Class
The entityName or the actual class of record to create.
id : Object
The id of the record.
deep : Boolean (optional)
true to consult
Defaults to: false
The record, null if it does not exist.
Process a read block of entities from the update method.
entityType : Ext.Class
The entity type.
items : Object[]
The data objects to read.
Sets a single/multiple configuration options.
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.
this
Create a child session with this session as the parent.
The copied session.
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
Destroys a given set of linked objects. This is only needed if
the linked object is being destroyed before this instance.
names : String[]
The names of the linked objects to destroy.
this
Complete a bulk update for this session.
data : Object
Data in the CRUD format (see the intro docs).
Process an update block for entities from the update method.
entityType : Ext.Class
The entity type.
items : Object[]
The data objects to update.
Walks the internal data tracked by this session and calls methods on the provided
visitor object. The visitor can then accumulate whatever data it finds important.
The visitor object can provide a number of methods, but all are optional.
This method does not enumerate associations since these can be traversed given the records that are enumerated. For many-to-many associations, however, this method does enumerate the changes because these changes are not "owned" by either side of such associations.
visitor : Object
onCleanRecord : Function (optional)
This method is called to describe a record that is known but unchanged.
record : Ext.data.Model
The unmodified record.
onDirtyRecord : Function (optional)
This method is called to describe a record that has either been created, dropped or modified.
record : Ext.data.Model
The modified record.
onMatrixChange : Function (optional)
This method is called to describe a change in a many-to-many association (a "matrix").
association : Ext.data.schema.Association
The object describing the many-to-many ("matrix") association.
leftId : Mixed
The idProperty of the record on the
"left" of the association.
rightId : Mixed
The idProperty of the record on the
"right" of the association.
state : Number
A negative number if the two records are being disassociated or a positive number if they are being associated. For example, when adding User 10 to Group 20, this would be 1. When removing the User this argument would be -1.
The visitor instance
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.
config : Object
mixinClass : Ext.Class (optional)
The mixin class if the configs are from a mixin.
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();
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
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() { ... };
});
members : Object
this
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 '$$$$$$$'
fromClass : Ext.Base
The class to borrow members from
members : Array/String
The names of the members to borrow
this
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.
the created instance.
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()
alias : String/Object
The new method name, or an object to set multiple aliases. See flexSetter
origin : String/Object
The original method name
Returns the Ext.Configurator for this class.
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'
className
Used internally by the mixins pre-processor
name : Object
mixinClass : Object
Override members of this class. Overridden methods can be invoked via 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).
members : Object
The properties to add to this class. This should be specified as an object literal containing one or more properties.
this class
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