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transition.ihookregistry.html
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transition.ihookregistry.html
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---
redirect_from: /docs/1.0.19/interfaces/transition.ihookregistry.html
---
<!doctype html>
<html class="default no-js">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>IHookRegistry | @uirouter/angularjs</title>
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<li>
<a href="../index.html">@uirouter/angularjs</a>
</li>
<li>
<a href="../modules/transition.html">transition</a>
</li>
<li>
<a href="transition.ihookregistry.html">IHookRegistry</a>
</li>
</ul>
<h1>Interface IHookRegistry</h1>
</div>
</div>
</header>
<div class="container container-main">
<div class="row">
<div class="col-8 col-content">
<section class="tsd-panel tsd-comment">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>This interface specifies the api for registering Transition Hooks. Both the
<a href="../classes/transition.transitionservice.html">TransitionService</a> and also the <a href="../classes/transition.transition-1.html">Transition</a> object itself implement this interface.
Note: the Transition object only allows hooks to be registered before the Transition is started.</p>
</div>
</div>
</section>
<section class="tsd-panel tsd-hierarchy">
<h3>Hierarchy</h3>
<ul class="tsd-hierarchy">
<li>
<span class="target">IHookRegistry</span>
</li>
</ul>
</section>
<section class="tsd-panel">
<h3>Implemented by</h3>
<ul class="tsd-hierarchy">
<li><a href="../classes/transition.transition-1.html" class="tsd-signature-type">Transition</a></li>
<li><a href="../classes/transition.transitionservice.html" class="tsd-signature-type">TransitionService</a></li>
</ul>
</section>
<section class="tsd-panel-group tsd-index-group">
<h2>Index</h2>
<section class="tsd-panel tsd-index-panel">
<div class="tsd-index-content">
<section class="tsd-index-section ">
<h3>Methods</h3>
<ul class="tsd-index-list">
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#gethooks" class="tsd-kind-icon">get<wbr>Hooks</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onbefore" class="tsd-kind-icon">on<wbr>Before</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onenter" class="tsd-kind-icon">on<wbr>Enter</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onerror" class="tsd-kind-icon">on<wbr>Error</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onexit" class="tsd-kind-icon">on<wbr>Exit</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onfinish" class="tsd-kind-icon">on<wbr>Finish</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onretain" class="tsd-kind-icon">on<wbr>Retain</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onstart" class="tsd-kind-icon">on<wbr>Start</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="transition.ihookregistry.html#onsuccess" class="tsd-kind-icon">on<wbr>Success</a></li>
</ul>
</section>
</div>
</section>
</section>
<section class="tsd-panel-group tsd-member-group ">
<h2>Methods</h2>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="gethooks" class="tsd-anchor"></a>
<!--
<h3>get<wbr>Hooks</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">get<wbr>Hooks<span class="tsd-signature-symbol">(</span>hookName<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">RegisteredHook[]</span></li>
<li class="tsd-header">
<p> Returns all the registered hooks of a given <code>hookName</code> type </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Returns all the registered hooks of a given <code>hookName</code> type</p>
</div>
<h4 id="example-">Example:</h4>
<pre><code><span class="hljs-meta">$</span><span class="bash">transitions.getHooks(<span class="hljs-string">"onEnter"</span>)</span>
</code></pre>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>hookName <span class="tsd-signature-type">string</span></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">RegisteredHook[]</span></h4>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L719">ui-router-core/src/transition/interface.ts:719</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onbefore" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Before</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Before<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called <em>before a transition starts</em>. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called <em>before a transition starts</em>.</p>
</div>
<p>Registers a transition lifecycle hook, which is invoked before a transition even begins.
This hook can be useful to implement logic which prevents a transition from even starting, such
as authentication, redirection</p>
<p>See <a href="transition.transitionhookfn.html">TransitionHookFn</a> for the signature of the function.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p><code>onBefore</code> hooks are invoked <em>before a Transition starts</em>.
No resolves have been fetched yet.
Each <code>onBefore</code> hook is invoked synchronously, in the same call stack as <a href="../classes/state.stateservice.html#transitionto">StateService.transitionTo</a>.
The registered <code>onBefore</code> hooks are invoked in priority order.</p>
<p>Note: during the <code>onBefore</code> phase, additional hooks can be added to the specific <a href="../classes/transition.transition-1.html">Transition</a> instance.
These "on-the-fly" hooks only affect the currently running transition..</p>
<h3 id="return-value">Return value</h3>
<p>The hook's return value can be used to pause, cancel, or redirect the current Transition.
See <a href="../modules/transition.html#hookresult">HookResult</a> for more information.</p>
<p>If any hook modifies the transition <em>synchronously</em> (by throwing, returning <code>false</code>, or returning
a <a href="../classes/state.targetstate.html">TargetState</a>), the remainder of the hooks are skipped.
If a hook returns a promise, the remainder of the <code>onBefore</code> hooks are still invoked synchronously.
All promises are resolved, and processed asynchronously before the <code>onStart</code> phase of the Transition.</p>
<h3 id="examples">Examples</h3>
<h4 id="default-substate">Default Substate</h4>
<p>This example redirects any transition from 'home' to 'home.dashboard'. This is commonly referred to as a
"default substate".</p>
<dl class="tsd-comment-tags">
<dt>example</dt>
<dd><pre><code class="lang-js"><span class="hljs-comment">// ng2</span>
transitionService.onBefore({ <span class="hljs-attr">to</span>: <span class="hljs-string">'home'</span> }, (trans: Transition) =>
trans.router.stateService.target(<span class="hljs-string">"home.dashboard"</span>));
</code></pre>
<h4 id="data-driven-default-substate">Data Driven Default Substate</h4>
<p>This example provides data-driven default substate functionality. It matches on a transition to any state
which has <code>defaultSubstate: "some.sub.state"</code> defined. See: <a href="../classes/transition.transition-1.html#to">Transition.to</a> which returns the "to state"
definition.</p>
</dd>
<dt>example</dt>
<dd><pre><code class="lang-js"><span class="hljs-comment">// ng1</span>
<span class="hljs-comment">// state declaration</span>
{
<span class="hljs-attr">name</span>: <span class="hljs-string">'home'</span>,
<span class="hljs-attr">template</span>: <span class="hljs-string">'<div ui-view/>'</span>,
<span class="hljs-attr">defaultSubstate</span>: <span class="hljs-string">'home.dashboard'</span>
}
<span class="hljs-keyword">var</span> criteria = {
<span class="hljs-attr">to</span>: <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">state</span>) </span>{
<span class="hljs-keyword">return</span> state.defaultSubstate != <span class="hljs-literal">null</span>;
}
}
$transitions.onBefore(criteria, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">trans: Transition</span>) </span>{
<span class="hljs-keyword">var</span> substate = trans.to().defaultSubstate;
<span class="hljs-keyword">return</span> trans.router.stateService.target(substate);
});
</code></pre>
<h4 id="require-authentication">Require authentication</h4>
<p>This example cancels a transition to a state which requires authentication, if the user is not currently authenticated.</p>
<p>This example assumes a state tree where all states which require authentication are children of a parent <code>'requireauth'</code> state.
This example assumes <code>MyAuthService</code> synchronously returns a boolean from <code>isAuthenticated()</code>.</p>
<h4 id="example-">Example:</h4>
<pre><code class="lang-js"><span class="hljs-comment">// ng1</span>
$transitions.onBefore( { <span class="hljs-attr">to</span>: <span class="hljs-string">'requireauth.**'</span> }, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">trans</span>) </span>{
<span class="hljs-keyword">var</span> myAuthService = trans.injector().get(<span class="hljs-string">'MyAuthService'</span>);
<span class="hljs-comment">// If isAuthenticated returns false, the transition is cancelled.</span>
<span class="hljs-keyword">return</span> myAuthService.isAuthenticated();
});
</code></pre>
</dd>
</dl>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L392">ui-router-core/src/transition/interface.ts:392</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onenter" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Enter</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Enter<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionstatehookfn.html" class="tsd-signature-type">TransitionStateHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a>, called when a specific state is entered. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a>, called when a specific state is entered.</p>
</div>
<p>Registers a lifecycle hook, which is invoked (during a transition) when a specific state is being entered.</p>
<p>Since this hook is run only when the specific state is being <em>entered</em>, it can be useful for
performing tasks when entering a submodule/feature area such as initializing a stateful service,
or for guarding access to a submodule/feature area.</p>
<p>See <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a> for the signature of the function.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
<code>onEnter</code> hooks generally specify <code>{ entering: 'somestate' }</code>.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p><code>onEnter</code> hooks are invoked when the Transition is entering a state.
States are entered after the <code>onRetain</code> phase is complete.
If more than one state is being entered, the parent state is entered first.
The registered <code>onEnter</code> hooks for a state are invoked in priority order.</p>
<p>Note: A built-in <code>onEnter</code> hook with high priority is used to fetch lazy resolve data for states being entered.</p>
<h3 id="return-value">Return value</h3>
<p>The hook's return value can be used to pause, cancel, or redirect the current Transition.
See <a href="../modules/transition.html#hookresult">HookResult</a> for more information.</p>
<h3 id="inside-a-state-declaration">Inside a state declaration</h3>
<p>Instead of registering <code>onEnter</code> hooks using the <a href="../classes/transition.transitionservice.html">TransitionService</a>, you may define an <code>onEnter</code> hook
directly on a state declaration (see: <a href="state.statedeclaration.html#onenter">StateDeclaration.onEnter</a>).</p>
<h3 id="examples">Examples</h3>
<h4 id="audit-log">Audit Log</h4>
<p>This example uses a service to log that a user has entered the admin section of an app.
This assumes that there are substates of the "admin" state, such as "admin.users", "admin.pages", etc.</p>
<dl class="tsd-comment-tags">
<dt>example</dt>
<dd><pre><code>
<span class="hljs-variable">$transitions</span>.<span class="hljs-keyword">on</span>Enter({ entering: 'admin' }, function(transition, <span class="hljs-keyword">state</span>) {
var AuditService = trans.injector().get('AuditService');
AuditService.<span class="hljs-keyword">log</span>(<span class="hljs-string">"Entered "</span> + <span class="hljs-keyword">state</span>.name + <span class="hljs-string">" module while transitioning to "</span> + transition.<span class="hljs-keyword">to</span>().name);
}
</code></pre><h4 id="audit-log-inside-a-state-declaration-">Audit Log (inside a state declaration)</h4>
<p>The <code>onEnter</code> inside this state declaration is syntactic sugar for the previous Audit Log example.</p>
<pre><code>{
name: 'admin',
component: 'admin',
<span class="hljs-keyword">on</span>Enter: function(<span class="hljs-variable">$transition</span>$, <span class="hljs-variable">$state</span>$) {
var AuditService = <span class="hljs-variable">$transition</span>$.injector().get('AuditService');
AuditService.<span class="hljs-keyword">log</span>(<span class="hljs-string">"Entered "</span> + <span class="hljs-keyword">state</span>.name + <span class="hljs-string">" module while transitioning to "</span> + transition.<span class="hljs-keyword">to</span>().name);
}
}
</code></pre><p>Note: A state declaration's <code>onEnter</code> function is injected for Angular 1 only.</p>
</dd>
</dl>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionstatehookfn.html" class="tsd-signature-type">TransitionStateHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be injected and invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L533">ui-router-core/src/transition/interface.ts:533</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onerror" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Error</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Error<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called after a transition has errored. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called after a transition has errored.</p>
</div>
<p>Registers a transition lifecycle hook, which is invoked after a transition has been rejected for any reason.</p>
<p>See <a href="transition.transitionhookfn.html">TransitionHookFn</a> for the signature of the function.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p>The <code>onError</code> hooks are chained off the Transition's promise (see <a href="../classes/transition.transition-1.html#promise">Transition.promise</a>).
If a Transition fails, its promise is rejected and the <code>onError</code> hooks are invoked.
The <code>onError</code> hooks are invoked in priority order.</p>
<p>Since these hooks are run after the transition is over, their return value is ignored.</p>
<p>A transition "errors" if it was started, but failed to complete (for any reason).
A <em>non-exhaustive list</em> of reasons a transition can error:</p>
<ul>
<li>A transition was cancelled because a new transition started while it was still running (<code>Transition superseded</code>)</li>
<li>A transition was cancelled by a Transition Hook returning false</li>
<li>A transition was redirected by a Transition Hook returning a <a href="../classes/state.targetstate.html">TargetState</a></li>
<li>A Transition Hook or resolve function threw an error</li>
<li>A Transition Hook returned a rejected promise</li>
<li>A resolve function returned a rejected promise</li>
</ul>
<p>To check the failure reason, inspect the return value of <a href="../classes/transition.transition-1.html#error">Transition.error</a>.</p>
<p>Note: <code>onError</code> should be used for targeted error handling, or error recovery.
For simple catch-all error reporting, use <a href="../classes/state.stateservice.html#defaulterrorhandler">StateService.defaultErrorHandler</a>.</p>
<h3 id="return-value">Return value</h3>
<p>Since the Transition is already completed, the hook's return value is ignored</p>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be injected and invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L709">ui-router-core/src/transition/interface.ts:709</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onexit" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Exit</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Exit<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionstatehookfn.html" class="tsd-signature-type">TransitionStateHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a>, called when a specific state is exited. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a>, called when a specific state is exited.</p>
</div>
<p>Registers a lifecycle hook, which is invoked (during a transition) when a specific state is being exited.</p>
<p>Since this hook is run only when the specific state is being <em>exited</em>, it can be useful for
performing tasks when leaving a submodule/feature area such as cleaning up a stateful service,
or for preventing the user from leaving a state or submodule until some criteria is satisfied.</p>
<p>See <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a> for the signature of the function.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
<code>onExit</code> hooks generally specify <code>{ exiting: 'somestate' }</code>.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p><code>onExit</code> hooks are invoked when the Transition is exiting a state.
States are exited after any <code>onStart</code> phase is complete.
If more than one state is being exited, the child states are exited first.
The registered <code>onExit</code> hooks for a state are invoked in priority order.</p>
<h3 id="return-value">Return value</h3>
<p>The hook's return value can be used to pause, cancel, or redirect the current Transition.
See <a href="../modules/transition.html#hookresult">HookResult</a> for more information.</p>
<h3 id="inside-a-state-declaration">Inside a state declaration</h3>
<p>Instead of registering <code>onExit</code> hooks using the <a href="../classes/transition.transitionservice.html">TransitionService</a>, you may define an <code>onExit</code> hook
directly on a state declaration (see: <a href="state.statedeclaration.html#onexit">StateDeclaration.onExit</a>).</p>
<p>Note: A state declaration's <code>onExit</code> function is injected for Angular 1 only.</p>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionstatehookfn.html" class="tsd-signature-type">TransitionStateHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be injected and invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L611">ui-router-core/src/transition/interface.ts:611</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onfinish" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Finish</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Finish<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called <em>just before a transition finishes</em>. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called <em>just before a transition finishes</em>.</p>
</div>
<p>Registers a transition lifecycle hook, which is invoked just before a transition finishes.
This hook is a last chance to cancel or redirect a transition.</p>
<p>See <a href="transition.transitionhookfn.html">TransitionHookFn</a> for the signature of the function.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p><code>onFinish</code> hooks are invoked after the <code>onEnter</code> phase is complete.
These hooks are invoked just before the transition is "committed".
Each hook is invoked in priority order.</p>
<h3 id="return-value">Return value</h3>
<p>The hook's return value can be used to pause, cancel, or redirect the current Transition.
See <a href="../modules/transition.html#hookresult">HookResult</a> for more information.</p>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be injected and invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L639">ui-router-core/src/transition/interface.ts:639</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onretain" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Retain</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Retain<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionstatehookfn.html" class="tsd-signature-type">TransitionStateHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a>, called when a specific state is retained/kept. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionstatehookfn.html">TransitionStateHookFn</a>, called when a specific state is retained/kept.</p>
</div>
<p>Registers a lifecycle hook, which is invoked (during a transition) for
a specific state that was previously active will remain active (is not being entered nor exited).</p>
<p>This hook is invoked when a state is "retained" or "kept".
It means the transition is coming <em>from</em> a substate of the retained state <em>to</em> a substate of the retained state.
This hook can be used to perform actions when the user moves from one substate to another, such as between steps in a wizard.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
<code>onRetain</code> hooks generally specify <code>{ retained: 'somestate' }</code>.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p><code>onRetain</code> hooks are invoked after any <code>onExit</code> hooks have been fired.
If more than one state is retained, the child states' <code>onRetain</code> hooks are invoked first.
The registered <code>onRetain</code> hooks for a state are invoked in priority order.</p>
<h3 id="return-value">Return value</h3>
<p>The hook's return value can be used to pause, cancel, or redirect the current Transition.
See <a href="../modules/transition.html#hookresult">HookResult</a> for more information.</p>
<h3 id="inside-a-state-declaration">Inside a state declaration</h3>
<p>Instead of registering <code>onRetain</code> hooks using the <a href="../classes/transition.transitionservice.html">TransitionService</a>, you may define an <code>onRetain</code> hook
directly on a state declaration (see: <a href="state.statedeclaration.html#onretain">StateDeclaration.onRetain</a>).</p>
<p>Note: A state declaration's <code>onRetain</code> function is injected for Angular 1 only.</p>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionstatehookfn.html" class="tsd-signature-type">TransitionStateHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be injected and invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L571">ui-router-core/src/transition/interface.ts:571</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onstart" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Start</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Start<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called when a transition starts. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called when a transition starts.</p>
</div>
<p>Registers a transition lifecycle hook, which is invoked as a transition starts running.
This hook can be useful to perform some asynchronous action before completing a transition.</p>
<p>See <a href="transition.transitionhookfn.html">TransitionHookFn</a> for the signature of the function.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p><code>onStart</code> hooks are invoked asynchronously when the Transition starts running.
This happens after the <code>onBefore</code> phase is complete.
At this point, the Transition has not yet exited nor entered any states.
The registered <code>onStart</code> hooks are invoked in priority order.</p>
<p>Note: A built-in <code>onStart</code> hook with high priority is used to fetch any eager resolve data.</p>
<h3 id="return-value">Return value</h3>
<p>The hook's return value can be used to pause, cancel, or redirect the current Transition.
See <a href="../modules/transition.html#hookresult">HookResult</a> for more information.</p>
<h3 id="example">Example</h3>
<h4 id="login-during-transition">Login during transition</h4>
<p>This example intercepts any transition to a state which requires authentication, when the user is
not currently authenticated. It allows the user to authenticate asynchronously, then resumes the
transition. If the user did not authenticate successfully, it redirects to the "guest" state, which
does not require authentication.</p>
<p>This example assumes:</p>
<ul>
<li>a state tree where all states which require authentication are children of a parent <code>'auth'</code> state.</li>
<li><code>MyAuthService.isAuthenticated()</code> synchronously returns a boolean.</li>
<li><code>MyAuthService.authenticate()</code> presents a login dialog, and returns a promise which is resolved
or rejected, whether or not the login attempt was successful.</li>
</ul>
<h4 id="example-">Example:</h4>
<pre><code class="lang-js"><span class="hljs-comment">// ng1</span>
$transitions.onStart( { <span class="hljs-attr">to</span>: <span class="hljs-string">'auth.**'</span> }, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">trans</span>) </span>{
<span class="hljs-keyword">var</span> $state = trans.router.stateService;
<span class="hljs-keyword">var</span> MyAuthService = trans.injector().get(<span class="hljs-string">'MyAuthService'</span>);
<span class="hljs-comment">// If the user is not authenticated</span>
<span class="hljs-keyword">if</span> (!MyAuthService.isAuthenticated()) {
<span class="hljs-comment">// Then return a promise for a successful login.</span>
<span class="hljs-comment">// The transition will wait for this promise to settle</span>
<span class="hljs-keyword">return</span> MyAuthService.authenticate().catch(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
<span class="hljs-comment">// If the authenticate() method failed for whatever reason,</span>
<span class="hljs-comment">// redirect to a 'guest' state which doesn't require auth.</span>
<span class="hljs-keyword">return</span> $state.target(<span class="hljs-string">"guest"</span>);
});
}
});
</code></pre>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be injected and invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L461">ui-router-core/src/transition/interface.ts:461</a></li>
</ul>
</aside> </li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="onsuccess" class="tsd-anchor"></a>
<!--
<h3>on<wbr>Success</h3>
-->
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">on<wbr>Success<span class="tsd-signature-symbol">(</span>matchCriteria<span class="tsd-signature-symbol">: </span><a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a>, callback<span class="tsd-signature-symbol">: </span><a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a>, options<span class="tsd-signature-symbol">?: </span><a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Function</span></li>
<li class="tsd-header">
<p> Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called after a successful transition completed. </p>
</li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Registers a <a href="transition.transitionhookfn.html">TransitionHookFn</a>, called after a successful transition completed.</p>
</div>
<p>Registers a transition lifecycle hook, which is invoked after a transition successfully completes.</p>
<p>See <a href="transition.transitionhookfn.html">TransitionHookFn</a> for the signature of the function.</p>
<p>The <a href="transition.hookmatchcriteria.html">HookMatchCriteria</a> is used to determine which Transitions the hook should be invoked for.
To match all Transitions, use an empty criteria object <code>{}</code>.</p>
<h3 id="lifecycle">Lifecycle</h3>
<p><code>onSuccess</code> hooks are chained off the Transition's promise (see <a href="../classes/transition.transition-1.html#promise">Transition.promise</a>).
If the Transition is successful and its promise is resolved, then the <code>onSuccess</code> hooks are invoked.
Since these hooks are run after the transition is over, their return value is ignored.
The <code>onSuccess</code> hooks are invoked in priority order.</p>
<h3 id="return-value">Return value</h3>
<p>Since the Transition is already completed, the hook's return value is ignored</p>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>matchCriteria <a href="transition.hookmatchcriteria.html" class="tsd-signature-type">HookMatchCriteria</a></h5>
: <div class="tsd-comment tsd-typography">
<p>defines which Transitions the Hook should be invoked for.</p>
</div>
</li>
<li>
<h5>callback <a href="transition.transitionhookfn.html" class="tsd-signature-type">TransitionHookFn</a></h5>
: <div class="tsd-comment tsd-typography">
<p>the hook function which will be injected and invoked.</p>
</div>
</li>
<li>
<h5>options: <span class="tsd-flag ts-flagOptional">Optional</span> <a href="transition.hookregoptions.html" class="tsd-signature-type">HookRegOptions</a></h5>
</li>
</ul>
<div class="tsd-returns">
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Function</span></h4>
: <p>a function which deregisters the hook.</p>
</div>
<hr>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/ui-router/core/blob/d461776/src/transition/interface.ts#L666">ui-router-core/src/transition/interface.ts:666</a></li>
</ul>
</aside> </li>
</ul>
</section>
</section>
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<a href="../index.html"><em>@uirouter/angularjs</em></a>
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