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POwhy angular-ui new state router transitions when only parameters changes?
 

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  1. POwhy angular-ui new state router transitions when only parameters changes?
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    <p>I'm using the <em>new</em> angular-ui router, the one that has a state-machine included (<a href="https://github.com/angular-ui/ui-router" rel="nofollow">https://github.com/angular-ui/ui-router</a>). This great router allows a user to specify parameters as part of the URL. </p> <p>for example: </p> <pre><code>$stateProvider .state('contacts.detail', { url: "/contacts/:contactId", templateUrl: 'contacts.detail.html', controller: function ($stateParams) { // If we got here from a url of /contacts/42 expect($stateParams).toBe({contactId: 42}); }] }) </code></pre> <p>(see <a href="https://github.com/angular-ui/ui-router/wiki/URL-Routing" rel="nofollow">here</a>)</p> <p>this means, that when the user navigates to /contacts/42, the state is changed to 'contacts.details' and the 42 parameter is injected into the controller </p> <p>There is a problem though. If ONLY the url parameter changes, the transitionTo function is still being called (could happen if the url is changed manually, for example, or bound to a input box). this in turn leads to the view directive of that state, to be re-created, both a waste of time and a problem if we only wanted to update something in that state.</p> <p>it seems to be on purpose. from the code:</p> <pre><code> // Starting from the root of the path, keep all levels that haven't changed var keep, state, locals = root.locals, toLocals = []; for (keep = 0, state = toPath[keep]; state &amp;&amp; state === fromPath[keep] &amp;&amp; equalForKeys(toParams, fromParams, state.ownParams); keep++, state = toPath[keep]) { locals = toLocals[keep] = state.locals; } </code></pre> <p>equalForKeys is what compares the params, and return false if there's a difference.</p> <p>My question: do you know why the author would have written it this way? do you think its safe to change, so that there's no transition when only parameters would change?</p> <p>thanks very much for reading all the way till here, and for any idea</p> <p>Lior</p> <p>EDIT: Seems that this is by design. just found: <a href="https://github.com/angular-ui/ui-router/issues/46" rel="nofollow">https://github.com/angular-ui/ui-router/issues/46</a></p>
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    1. COIt's a better default behavior; The router should be good enough that you don't have to maintain route state on your side (Something the default Angular router is terrible at)
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