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.
Ext.ClassManager manages all classes and handles mapping from string class name to actual class objects throughout the whole framework. It is not generally accessed directly, rather through these convenient shorthands:
Ext.define(className, properties);
in which properties is an object represent a collection of properties that apply to the class. See
Ext.ClassManager#create for more detailed instructions.
Ext.define('Person', {
name: 'Unknown',
constructor: function(name) {
if (name) {
this.name = name;
}
},
eat: function(foodType) {
alert("I'm eating: " + foodType);
return this;
}
});
var aaron = new Person("Aaron");
aaron.eat("Sandwich"); // alert("I'm eating: Sandwich");
Ext.Class has a powerful set of extensible pre-processors which takes care of everything related to class creation, including but not limited to inheritance, mixins, configuration, statics, etc.
Ext.define('Developer', {
extend: 'Person',
constructor: function(name, isGeek) {
this.isGeek = isGeek;
// Apply a method from the parent class' prototype
this.callParent([name]);
},
code: function(language) {
alert("I'm coding in: " + language);
this.eat("Bugs");
return this;
}
});
var jacky = new Developer("Jacky", true);
jacky.code("JavaScript"); // alert("I'm coding in: JavaScript");
// alert("I'm eating: Bugs");
See Ext.Base#callParent for more details on calling superclass' methods
Ext.define('CanPlayGuitar', {
playGuitar: function() {
alert("F#...G...D...A");
}
});
Ext.define('CanComposeSongs', {
composeSongs: function() { ... }
});
Ext.define('CanSing', {
sing: function() {
alert("For he's a jolly good fellow...")
}
});
Ext.define('Musician', {
extend: 'Person',
mixins: {
canPlayGuitar: 'CanPlayGuitar',
canComposeSongs: 'CanComposeSongs',
canSing: 'CanSing'
}
})
Ext.define('CoolPerson', {
extend: 'Person',
mixins: {
canPlayGuitar: 'CanPlayGuitar',
canSing: 'CanSing'
},
sing: function() {
alert("Ahem....");
this.mixins.canSing.sing.call(this);
alert("[Playing guitar at the same time...]");
this.playGuitar();
}
});
var me = new CoolPerson("Jacky");
me.sing(); // alert("Ahem...");
// alert("For he's a jolly good fellow...");
// alert("[Playing guitar at the same time...]");
// alert("F#...G...D...A");
Ext.define('SmartPhone', {
config: {
hasTouchScreen: false,
operatingSystem: 'Other',
price: 500
},
isExpensive: false,
constructor: function(config) {
this.initConfig(config);
},
applyPrice: function(price) {
this.isExpensive = (price > 500);
return price;
},
applyOperatingSystem: function(operatingSystem) {
if (!(/^(iOS|Android|BlackBerry)$/i).test(operatingSystem)) {
return 'Other';
}
return operatingSystem;
}
});
var iPhone = new SmartPhone({
hasTouchScreen: true,
operatingSystem: 'iOS'
});
iPhone.getPrice(); // 500;
iPhone.getOperatingSystem(); // 'iOS'
iPhone.getHasTouchScreen(); // true;
iPhone.isExpensive; // false;
iPhone.setPrice(600);
iPhone.getPrice(); // 600
iPhone.isExpensive; // true;
iPhone.setOperatingSystem('AlienOS');
iPhone.getOperatingSystem(); // 'Other'
Ext.define('Computer', {
statics: {
factory: function(brand) {
// 'this' in static methods refer to the class itself
return new this(brand);
}
},
constructor: function() { ... }
});
var dellComputer = Computer.factory('Dell');
Also see Ext.Base#statics and Ext.Base#self for more details on accessing static properties within class methods
A collection of diagnostic methods to decorate the real methods of the class. These
methods are applied as an override if this class has debug enabled as defined by
Ext.isDebugEnabled.
These will be automatically removed by the Sencha Cmd compiler for production builds.
Example usage:
Ext.define('Foo.bar.Class', {
foo: function (a, b, c) {
...
},
bar: function (a, b) {
...
return 42;
},
debugHooks: {
foo: function (a, b, c) {
// check arguments...
return this.callParent(arguments);
}
}
});
If you specify a $enabled property in the debugHooks object that will be used
as the default enabled state for the hooks. If the Ext#manifest contains
a debug object of if Ext#debugConfig is specified, the $enabled flag
will override its "*" value.
The object given has properties that describe the versions at which the deprecations apply.
The purpose of the deprecated declaration is to enable development mode to give
suitable error messages when deprecated methods or properties are used. Methods can
always be injected to provide this feedback, but properties can only be handled on
some browsers (those that support Object.defineProperty).
In some cases, deprecated methods can be restored to their previous behavior or added back if they have been removed.
The structure of a deprecated declaration is this:
Ext.define('Foo.bar.Class', {
...
deprecated: {
// Optional package name - default is the framework (ext or touch)
name: 'foobar',
'5.0': {
methods: {
// Throws: '"removedMethod" is deprecated.'
removedMethod: null,
// Throws: '"oldMethod" is deprecated. Please use "newMethod" instead.'
oldMethod: 'newMethod',
// When this block is enabled, this method is applied as an
// override. Otherwise you get same as "removeMethod".
method: function () {
// Do what v5 "method" did. If "method" exists in newer
// versions callParent can call it. If 5.1 has "method"
// then it would be next in line, otherwise 5.2 and last
// would be the current class.
},
moreHelpful: {
message: 'Something helpful to do instead.',
fn: function () {
// The v5 "moreHelpful" method to use when enabled.
}
}
},
properties: {
// Throws: '"removedProp" is deprecated.'
removedProp: null,
// Throws: '"oldProp" is deprecated. Please use "newProp" instead.'
oldProp: 'newProp',
helpful: {
message: 'Something helpful message about what to do.'
}
...
},
statics: {
methods: {
...
},
properties: {
...
},
}
},
'5.1': {
...
},
'5.2': {
...
}
}
});
The primary content of deprecated are the version number keys. These indicate
a version number where methods or properties were deprecated. These versions are
compared to the version reported by Ext.getCompatVersion to determine the action
to take for each "block".
When the compatibility version is set to a value less than a version number key, that block is said to be "enabled". For example, if a method was deprecated in version 5.0 but the desired compatibility level is 4.2 then the block is used to patch methods and (to some degree) restore pre-5.0 compatibility.
When multiple active blocks have the same method name, each method is applied as
an override in reverse order of version. In the above example, if a method appears
in the "5.0", "5.1" and "5.2" blocks then the "5.2" method is applied as an override
first, followed by the "5.1" method and finally the "5.0" method. This means that
the callParent from the "5.0" method calls the "5.1" method which calls the
"5.2" method which can (if applicable) call the current version.
Allows setting config values for a class based on specific platforms. The value of this config is an object whose properties are "rules" and whose values are objects containing config values.
For example:
Ext.define('App.view.Foo', {
extend: 'Ext.panel.Panel',
platformConfig: {
desktop: {
title: 'Some Rather Descriptive Title'
},
'!desktop': {
title: 'Short Title'
}
}
});
In the above, "desktop" and "!desktop" are (mutually exclusive) rules. Whichever
evaluates to true will have its configs applied to the class. In this case, only
the "title" property, but the object can contain any number of config properties.
In this case, the platformConfig is evaluated as part of the class and there is
no cost for each instance created.
The rules are evaluated expressions in the context of the platform tags contained
in Ext.platformTags. Any properties of that object are
implicitly usable (as shown above).
If a platformConfig specifies a config value, it will replace any values declared
on the class itself.
Use of platformConfig on instances is handled by the config system when classes
call initConfig. For example:
Ext.create({
xtype: 'panel',
platformConfig: {
desktop: {
title: 'Some Rather Descriptive Title'
},
'!desktop': {
title: 'Short Title'
}
}
});
The following is equivalent to the above:
if (Ext.platformTags.desktop) {
Ext.create({
xtype: 'panel',
title: 'Some Rather Descriptive Title'
});
} else {
Ext.create({
xtype: 'panel',
title: 'Short Title'
});
}
To adjust configs based on dynamic conditions, see Ext.mixin.Responsive.
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