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.
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.
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.
ExtReact component classes display
configuration options as props
ExtReact component classes do not list
properties as a dedicated member type, but rather as
read only props
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.
All ExtReact props are bindable
unless decorated as immutable
Immutable ExtReact props may not be use as a configurable prop when instantiating a component
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
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
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.
ExtReact component classes do not hoist the getter /
setter methods into the prop. All methods will be described in the
Methods section
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.
Manages factories for families of classes (classes with a common alias prefix). The
factory for a class family is a function stored as a static on Ext.Factory. These
are created either by directly calling Ext.Factory.define or by using the
Ext.mixin.Factoryable interface.
To illustrate, consider the layout system's use of aliases. The hbox layout maps to
the "layout.hbox" alias that one typically provides via the layout config on a
Container.
Under the covers this maps to a call like this:
Ext.Factory.layout('hbox');
Or possibly:
Ext.Factory.layout({
type: 'hbox'
});
The value of the layout config is passed to the Ext.Factory.layout function. The
exact signature of a factory method matches Ext.Factory#create.
To define this factory directly, one could call Ext.Factory.define like so:
Ext.Factory.define('layout', 'auto'); // "layout.auto" is the default type
The prefix to apply to type values to form a complete alias. This defaults to the
proper value in most all cases and should not need to be specified.
Available since: 5.0.0
The prefix to apply to type values to form a complete alias. This defaults to the
proper value in most all cases and should not need to be specified.
Available since: 5.0.0
The name of the method used to prepare config objects for creation. This defaults
to 'create' plus the capitalized name (e.g., 'createLayout' for the 'laoyut'
alias family).
Defaults to:
'create' + Ext.String.capitalize(me.name)
The name of the method used to prepare config objects for creation. This defaults
to 'create' plus the capitalized name (e.g., 'createLayout' for the 'laoyut'
alias family).
The config property to set when the factory is given a config that is a string.
Defaults to:
"type"
Available since: 5.0.0
The config property to set when the factory is given a config that is a string.
Defaults to:
"type"
Available since: 5.0.0
An optional type to use if none is given to the factory at invocation. This is a
suffix added to the aliasPrefix. For example, if aliasPrefix="layout." and
defaultType="hbox" the default alias is "layout.hbox". This is an alternative
to xclass so only one should be provided.
Defaults to:
null
Available since: 5.0.0
An optional type to use if none is given to the factory at invocation. This is a
suffix added to the aliasPrefix. For example, if aliasPrefix="layout." and
defaultType="hbox" the default alias is "layout.hbox". This is an alternative
to xclass so only one should be provided.
Defaults to:
null
Available since: 5.0.0
The property that identifies an object as instance vs a config.
Defaults to:
"isInstance"
Available since: 5.0.0
The property that identifies an object as instance vs a config.
Defaults to:
"isInstance"
Available since: 5.0.0
The property from which to read the type alias suffix.
Defaults to:
"type"
Available since: 6.5.0
The property from which to read the type alias suffix.
Defaults to:
"type"
Available since: 6.5.0
The full classname of the type of instance to create when none is provided to the
factory. This is an alternative to defaultType so only one should be specified.
Defaults to:
null
Available since: 5.0.0
The full classname of the type of instance to create when none is provided to the
factory. This is an alternative to defaultType so only one should be specified.
Defaults to:
null
Available since: 5.0.0
The Class reference of the type of instance to create when none is provided to the
factory. This property is set from xclass when the factory instance is created.
Defaults to:
null
Available since: 5.0.0
Creates an instance of this class family given configuration options.
Available since: 5.0.0
config : Object/String (optional)
The configuration or instance (if an Object) or just the type (if a String) describing the instance to create.
defaultType : String/Object (optional)
The type to create if no type is contained in the
config, or an object containing a default set of configs.
The newly created instance.
Creates an instance of this class family given configuration options.
Available since: 5.0.0
config : Object/String (optional)
The configuration or instance (if an Object) or just the type (if a String) describing the instance to create.
defaultType : String/Object (optional)
The type to create if no type is contained in the
config, or an object containing a default set of configs.
The newly created instance.
Returns an instance of an ID generator based on the ID you pass in.
config : String/Object
The config object or id to lookup.
Ext.data.identifier.* The data identifier
Sets a hook on the creation process. If the hook fn returns undefined then
the original create method is called.
Available since: 6.5.0
This method accepts a config object and an existing instance if one exists
(can be null).
The details are best explained by example:
config: {
header: {
xtype: 'itemheader'
}
},
applyHeader: function (header, oldHeader) {
return Ext.Factory.widget.update(oldHeader, header,
this, 'createHeader');
},
createHeader: function (header) {
return Ext.apply({
xtype: 'itemheader',
ownerCmp: this
}, header);
}
Normally the applyHeader method would have to coordinate potential reuse of
the oldHeader and perhaps call setConfig on it with the new header config
options. If there was no oldHeader, of course, a new instance must be created
instead. These details are handled by this method. If the oldHeader is not
reused, it will be destroyed.
For derived class flexibility, the pattern of calling out to a "creator" method
that only returns the config object has become widely used in many components.
This pattern is also covered in this method. The goal is to allow the derived
class to callParent and yet not end up with an instantiated component (since
the type may not yet be known).
This mechanism should be used in favor of Ext.factory().
Available since: 6.5.0
instance : Ext.Base
config : Object/String
The configuration (see create).
creator : Object (optional)
If passed, this object must provide the creator
method or the creatorMethod parameter.
creatorMethod : String (optional)
The name of a creation wrapper method on the
given creator instance that "upgrades" the raw config object into a final
form for creation.
defaultsConfig : String (optional)
The name of a config property (on the provided
creator instance) that contains defaults to be used to create instances. These
defaults are present in the config object passed to the creatorMethod.
The reconfigured instance or a newly created one.
This method accepts a config object and an existing instance if one exists
(can be null).
The details are best explained by example:
config: {
header: {
xtype: 'itemheader'
}
},
applyHeader: function (header, oldHeader) {
return Ext.Factory.widget.update(oldHeader, header,
this, 'createHeader');
},
createHeader: function (header) {
return Ext.apply({
xtype: 'itemheader',
ownerCmp: this
}, header);
}
Normally the applyHeader method would have to coordinate potential reuse of
the oldHeader and perhaps call setConfig on it with the new header config
options. If there was no oldHeader, of course, a new instance must be created
instead. These details are handled by this method. If the oldHeader is not
reused, it will be destroyed.
For derived class flexibility, the pattern of calling out to a "creator" method
that only returns the config object has become widely used in many components.
This pattern is also covered in this method. The goal is to allow the derived
class to callParent and yet not end up with an instantiated component (since
the type may not yet be known).
This mechanism should be used in favor of Ext.factory().
Available since: 6.5.0
instance : Ext.Base
config : Object/String
The configuration (see create).
creator : Object (optional)
If passed, this object must provide the creator
method or the creatorMethod parameter.
creatorMethod : String (optional)
The name of a creation wrapper method on the
given creator instance that "upgrades" the raw config object into a final
form for creation.
The reconfigured instance or a newly created one.
For example, the layout alias family could be defined like this:
Ext.Factory.define('layout', {
defaultType: 'auto'
});
To define multiple families at once:
Ext.Factory.define({
layout: {
defaultType: 'auto'
}
});
Available since: 5.0.0
type : String
The alias family (e.g., "layout").
config : Object/String (optional)
An object specifying the config for the Ext.Factory
to be created. If a string is passed it is treated as the defaultType.
For example, the layout alias family could be defined like this:
Ext.Factory.define('layout', {
defaultType: 'auto'
});
To define multiple families at once:
Ext.Factory.define({
layout: {
defaultType: 'auto'
}
});
Available since: 5.0.0
type : String
The alias family (e.g., "layout").
config : Object/String (optional)
An object specifying the config for the Ext.Factory
to be created. If a string is passed it is treated as the defaultType.
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).
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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