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.
A mixin that provides the functionality for inheritable configs. This allows linking components and containers via a prototype-chained object for accessing inherited values.
A component's inherited state is used to keep track of aspects of a component's state that might be influenced by its ancestors like "collapsed" and "hidden". For example:
var hidden = this.getInheritedConfig('hidden');
The above will produce true if this or any ancestor component has its hidden config
set to true.
Inheritable properties are implemented by chaining each component's inherited state
object to its parent container's inherited state object via the prototype. The result
is such that if a component's inheritedState does not have it's own property, it
inherits the property from the nearest ancestor that does.
In the case of a Container, two state objects are created. The primary ("outer") object
is used for reading inherited properties. It is also what a child will prototype chain
to if that child is not part of the container's items collection. Anything in the
items collection will chain to the inheritedStateInner object instead. This object is
prototype chained to inheritedState but allows for Container's layout to set inherited
properties that specifically apply only to children of the container. This inner object
is unlikely to be needed by user code.
The first step to publishing inherited properties is to override initInheritedState
and add properties that have inheritable values.
initInheritedState: function (inheritedState) {
this.callParent(arguments);
if (this.getHidden()) {
inheritedState.hidden = true;
}
}
The above is important because initInheritedState is called whenever the object needs
to be repopulated. As you can see, only true values are added to inheritedState in
this case because false would mask a hidden value of true from an ancestor.
If these values change dynamically, these properties must be maintained. For example:
updateHidden: function (hidden) {
var inherited = this.getInherited();
if (hidden) {
inherited.hidden = true;
} else {
// Unmask whatever may be inherited:
delete inherited.hidden;
}
}
ALWAYS access inherited state using getInherited or getInheritedConfig, not by
accessing inheritedState directly.
The inheritedState property does not exist until the first call to getInherited. At
that point getInherited walks up the component tree to establish the inheritedState
prototype chain. Additionally the inheritedState property should NOT be relied upon
even after the initial call to getInherited because it is possible for it to become
invalid.
Invalidation typically happens when a component is moved to a new container. In such a
case the inheritedState remains invalid until the next time getInherited is called
on the component or one of its descendants.
Bubbles up the getRefOwner hierarchy, calling the specified function
with each component. The scope (this reference) of the function call will be the
scope provided or the current component. The arguments to the function will
be the args provided or the current component. If the function returns false at any
point, the bubble is stopped.
fn : Function
The function to call
scope : Object (optional)
The scope of the function. Defaults to current node.
args : Array (optional)
The args to call the function with. Defaults to passing the current component.
This method returns an object containing the inherited properties for this instance.
Available since: 5.0.0
inner : Boolean (optional)
Pass true to return inheritedStateInner instead
of the normal inheritedState object. This is only needed internally and should
not be passed by user code.
Defaults to: false
The inheritedState object containing inherited properties.
This method returns an object containing the inherited properties for this instance.
Available since: 5.0.0
inner : Boolean (optional)
Pass true to return inheritedStateInner instead
of the normal inheritedState object. This is only needed internally and should
not be passed by user code.
Defaults to: false
The inheritedState object containing inherited properties.
This method returns the value of a config property that may be inherited from some ancestor.
In some cases, a config may be explicitly set on a component with the intent of
only being presented to its children while that component should act upon the
inherited value (see referenceHolder for example). In these cases the skipThis
parameter should be specified as true.
Available since: 5.0.0
property : String
The name of the config property to return.
skipThis : Boolean (optional)
Pass true if the property should be ignored if
found on this instance. In other words, true means the property must be inherited
and not explicitly set on this instance.
Defaults to: false
The value of the requested property.
This method returns the value of a config property that may be inherited from some ancestor.
In some cases, a config may be explicitly set on a component with the intent of
only being presented to its children while that component should act upon the
inherited value (see referenceHolder for example). In these cases the skipThis
parameter should be specified as true.
Available since: 5.0.0
property : String
The name of the config property to return.
skipThis : Boolean (optional)
Pass true if the property should be ignored if
found on this instance. In other words, true means the property must be inherited
and not explicitly set on this instance.
Defaults to: false
The value of the requested property.
Used by Ext.ComponentQuery, and the up method to find the owning Component in the linkage hierarchy.
By default this returns the Container which contains this Component.
This may be overridden by Component authors who implement ownership hierarchies which are not based upon ownerCt, such as BoundLists being owned by Fields or Menus being owned by Buttons.
This method is called to initialize the inheritedState objects for this instance.
This amounts to typically copying certain properties from the instance to the given
object.
Available since: 5.0.0
inheritedState : Object
The state object for this instance.
inheritedStateInner : Object (optional)
This object is only provided for containers.
This method marks the current inherited state as invalid. The next time a call is
made to getInherited the objects will be recreated and initialized.
Available since: 5.0.0
Determines whether this Component is an ancestor of the passed Component.
This will return true if the passed Component is anywhere within the subtree
beneath this Component.
possibleDescendant : Ext.Component
The Component to test for presence within this Component's subtree.
Determines whether this Component is an ancestor of the passed Component.
This will return true if the passed Component is anywhere within the subtree
beneath this Component.
possibleDescendant : Ext.Component
The Component to test for presence within this Component's subtree.
Determines whether this component is the descendant of a passed component.
ancestor : Ext.Component
A Component which may contain this Component.
true if the component is the descendant of the passed component,
otherwise false.
Determines whether this component is the descendant of a passed component.
ancestor : Ext.Component
A Component which may contain this Component.
true if the component is the descendant of the passed component,
otherwise false.
Gets the Form or Component that is used as the name holder for this component.
Available since: 6.5.0
skipThis : Boolean (optional)
false to return this as the name holder if
this instance has set nameHolder. Unlike getInheritedConfig this method
defaults to true because it is possible that a name property set by the
owner of a component that is also a nameHolder itself. In this case, the
name connects not to this component but to the parent nameHolder.
Defaults to: true
The name holder.
Gets the Controller or Component that is used as the reference holder for this view.
Available since: 5.0.0
skipThis : Boolean (optional)
false to return this as the reference holder if
this instance has set referenceHolder. Unlike getInheritedConfig this method
defaults to true because it is possible that a reference property set by the
owner of a component that is also a referenceHolder itself. In this case, the
reference connects not to this component but to the parent referenceHolder.
Defaults to: true
The reference holder.
Called when this Inheritable is added to a parent
parent : Object
instanced : Boolean
Called when this inheritable is removed from a parent
destroying : Boolean
true if this item will be destroyed by it's container
Gets the Controller or Component that is used as the event root for this view.
Available since: 5.0.0
defaultScope : Object (optional)
The default scope to return if none is found.
Defaults to: this
The default listener scope.
Returns the default listener scope for a "satellite" of this component. Used for resolving scope for observable objects that are not part of the normal Container/Component hierarchy (for example, plugins)
Available since: 5.1.1
satellite : Ext.mixin.Observable
defaultScope : Object (optional)
The listener scope
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
ExtReact | Terms of Use