Interface Ng2StateDeclaration

An abstract state can never be directly activated. Use an abstract state to provide inherited properties (url, resolve, data, etc) to children states.

A property of Ng2StateDeclaration or Ng2ViewDeclaration:

The component class which will be used for this view.

Resolve data can be provided to the component using Dependency Injection. Currently, resolves must be injected into the component using @Inject('key'), where key is the name of the resolve.

TODO: document ng2 shorthand, like ng1's shorthand: inside a "views:" block, a bare string "foo" is shorthand for { component: "foo" }

example

.state('profile', {
  // Use the <my-profile></my-profile> component for the Unnamed view
  component: MyProfileComponent,
}

.state('messages', {
  // use the <nav-bar></nav-bar> component for the view named 'header'
  // use the <message-list></message-list> component for the view named 'content'
  views: {
    header: { component: NavBar },
    content: { component: MessageList }
  }
}

.state('contacts', {
  // Inside a "views:" block, supplying only a Component class is shorthand for { component: NavBar }
  // use the <nav-bar></nav-bar> component for the view named 'header'
  // use the <contact-list></contact-list> component for the view named 'content'
  views: {
    header: NavBar,
    content: ContactList
  }
}

This is a spot for you to store inherited state metadata. Child states' data object will prototypically inherit from the parent state .

This is a good spot to put metadata such as requiresAuth.

A unique state name, e.g. "home", "about", "contacts". To create a parent/child state use a dot, e.g. "about.sales", "home.newest".

Note: States require unique names. If you omit this property, you must provide the state name when you register it with the [[$stateProvider]].

An object which optionally configures parameters declared in the url, or defines additional non-url parameters. For each parameter being configured, add a ParamDeclaration keyed to the name of the parameter.

example

params: {
  param1: {
   type: "int",
   array: true,
   value: []
  },
  param2: {
    value: "index"
  }
}

Normally, a state's parent is implied from the state's name, e.g., "parentstate.childstate".

Alternatively, you can explicitly set the parent state using this property. This allows shorter state names, e.g., <a ui-sref="childstate">Child</a> instead of `Child

When using this property, the state's name should not have any dots in it.

example

var parentstate = {
  name: 'parentstate'
}
var childstate = {
  name: 'childstate',
  parent: 'parentstate'
  // or use a JS var which is the parent StateDeclaration, i.e.:
  // parent: parentstate
}

deprecated

define individual parameters as ParamDeclaration.dynamic

An object which defines dynamic dependencies/data that can then be injected into this state (or its children) during a Transition.

Define a new dependency by adding a key/value to the resolve property of the StateDeclaration.

• The key (string) is the name of the dependency.
• The value (function) is an injectable function which returns the dependency, or a promise for the dependency.

example

resolve: {
  // If you inject `myStateDependency` into a controller, you'll get "abc"
  myStateDependency: function() {
    return "abc";
  },
  myAsyncData: function($http) {
    // Return a promise (async) for the data
    return $http.get("/api/v1/data");
  }
}

Lifecycle

Since a resolve function can return a promise, the router will delay entering the state until the promises are ready. If any of the promises are rejected, the Transition is aborted with an Error.

By default, resolves for a state are fetched just before that state is entered. Note that only states which are being entered have their resolves fetched. States that are "retained" do not have their resolves re-fetched. If you are currently in a parent state A and are transitioning to a child state A.B, the previously resolved data for state A can be injected into A.B without delay.

Any resolved data for A.B is retained until A.B is exited, e.g., by transitioning back to the parent state A.

Because of this, resolves are a great place to fetch your application's primary data.

Injecting resolves into other things

During a transition, Resolve data can be injected into:

• Transition Hooks, e.g., $transitions.onStart/onEnter
• ui-view Controllers
• TemplateProviders and ControllerProviders
• Other resolves

Injecting other things into resolves

Since resolve functions are injected, a common pattern is to inject a custom service such as UserService and delegate to a custom service method, such as UserService.list();

A resolve function can inject some special values:

• $transition$: The current Transition object; information and API about the current transition, such as "to" and "from" State Parameters and transition options.
• Other resolves: This resolve can depend on another resolve, either from the same state, or from any parent state.
• $stateParams: (deprecated) The parameters for the current state (Note: these parameter values are

example

resolve: {
  // Define a resolve 'allusers' which delegates to the UserService
  allusers: function(UserService) {
    return UserService.list(); // list() returns a promise (async) for all the users
  },
  // Define a resolve 'user' which depends on the allusers resolve.
  // This resolve function is not called until 'allusers' is ready.
  user: function(allusers, $transition$) {
    return _.find(allusers, $transition$.params().userId);
  }
}

This can be either "EAGER" or "LAZY". When "EAGER", the state's resolves are fetched before any states are entered. When "LAZY", the resolves are fetched when the state is being entered.

The default is "LAZY".

A URL fragment (with optional parameters) which is used to match the browser location with this state.

This fragment will be appended to the parent state's URL in order to build up the overall URL for this state. See UrlMatcher for details on acceptable patterns.

examples

url: "/home"
// Define a parameter named 'userid'
url: "/users/:userid"
// param 'bookid' has a custom regexp
url: "/books/{bookid:[a-zA-Z_-]}"
// param 'categoryid' is of type 'int'
url: "/books/{categoryid:int}"
// two parameters for this state
url: "/books/{publishername:string}/{categoryid:int}"
// Query parameters
url: "/messages?before&after"
// Query parameters of type 'date'
url: "/messages?{before:date}&{after:date}"
// Path and query parameters
url: "/messages/:mailboxid?{before:date}&{after:date}"