{"id":27264,"date":"2024-04-24T15:52:19","date_gmt":"2024-04-24T13:52:19","guid":{"rendered":"https:\/\/www.codemotion.com\/magazine\/?p=27264"},"modified":"2024-04-24T15:52:19","modified_gmt":"2024-04-24T13:52:19","slug":"reindirizzare-guardie-e-resolver-in-angular-v18","status":"publish","type":"post","link":"https:\/\/www.codemotion.com\/magazine\/it\/frontend-it\/reindirizzare-guardie-e-resolver-in-angular-v18\/","title":{"rendered":"Reindirizzare Guardie e Resolver in Angular v18"},"content":{"rendered":"\n<p>Nell\u2019era odierna dello sviluppo web, creare applicazioni dinamiche e interattive \u00e8 ormai la norma. La creazione di funzionalit\u00e0 esclusive per determinati utenti, o disponibili al verificarsi di specifiche condizioni, pu\u00f2 rivelarsi una sfida molto complessa.<\/p>\n\n\n\n<p>Per questo motivo, <strong>Angular<\/strong> ci offre un sistema di routing basato su rotte, in inglese <strong><strong>Routes<\/strong><\/strong>, regole e componenti, con cui possiamo progettare facilmente le nostre applicazioni. &nbsp;<\/p>\n\n\n\n<p>In questo articolo, vedremo come proteggere le nostre <strong>Route<\/strong> reindirizzando la navigazione altrove, utilizzando inoltre una nuova funzionalit\u00e0 offerta da <strong>Angular v18<\/strong>.<\/p>\n\n\n\n<p>Ma prima di procedere, facciamo un breve ripasso della libreria <strong>Angular Router<\/strong>&#8230;<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-angular-router-guardie-e-resolver\">Angular Router: Guardie e Resolver<\/h2>\n\n\n\n<p>La libreria <strong>Angular Router<\/strong> ci permette di gestire la navigazione all&#8217;interno della nostra applicazione Angular, definendo una lista di <strong>Route<\/strong>.<\/p>\n\n\n\n<p>Ogni <strong>Route<\/strong> \u00e8 definita da una serie di informazioni, come il path per accedervi, il componente Angular da caricare, <strong>Route figlie<\/strong> e molto altro:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { Route } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/router'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { MyFeatureComponent, MyFeatureGuard } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/my-feature'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span>\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">const<\/span> routes: Route&#91;] = &#91;\n<\/span><\/span><mark class='shcb-loc'><span>  {\n<\/span><\/mark><mark class='shcb-loc'><span>    path: <span class=\"hljs-string\">'my-feature'<\/span>,\n<\/span><\/mark><mark class='shcb-loc'><span>    component: MyFeatureComponent,\n<\/span><\/mark><mark class='shcb-loc'><span>    canActivate: &#91;MyFeatureGuard],\n<\/span><\/mark><mark class='shcb-loc'><span>    data: {\n<\/span><\/mark><mark class='shcb-loc'><span>      id: <span class=\"hljs-string\">\"my-feature-id\"<\/span>\n<\/span><\/mark><mark class='shcb-loc'><span>    }\n<\/span><\/mark><mark class='shcb-loc'><span>  }\n<\/span><\/mark><span class='shcb-loc'><span>];\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Possiamo proteggere una o pi\u00f9 <strong>Route<\/strong>, limitandone l&#8217;accesso o l&#8217;abbandono, in base a determinate condizioni, utilizzando delle apposite funzioni chiamate <strong>Guardie<\/strong>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { Route } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/router'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { MyService } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/my-feature'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span>\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">const<\/span> myRoute: Route = &#91;\n<\/span><\/span><span class='shcb-loc'><span>  path: <span class=\"hljs-string\">'my-feature'<\/span>,\n<\/span><\/span><mark class='shcb-loc'><span>  canMatch: &#91;<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> inject(MyService).canMatch()],\n<\/span><\/mark><mark class='shcb-loc'><span>  canActivate: &#91;<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> inject(MyService).canActivate()],\n<\/span><\/mark><mark class='shcb-loc'><span>  canActivateChild: &#91;<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> inject(MyService).canActivateChild()],\n<\/span><\/mark><mark class='shcb-loc'><span>  canDeactivate: &#91;<span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> inject(MyService).canDeactivate()],\n<\/span><\/mark><span class='shcb-loc'><span>];\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><a href=\"https:\/\/www.codemotion.com\/magazine\/it\/frontend-it\/la-nuova-funzione-output-di-angular\/\" target=\"_blank\" aria-label=\"Articolo consigliato: La nuova funzione output di Angular (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\"><em>Articolo consigliato: La nuova funzione output di Angular<\/em><\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Esistono quattro tipi di <strong>Guardie<\/strong> Angular, ognuna con un ruolo differente:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code><strong>canMatch<\/strong><\/code>: viene utilizzata per verificare che una <strong>Route<\/strong> possa essere caricata. Possiamo definire pi\u00f9 <strong>Route<\/strong> per un singolo percorso e utilizzare questa guardia per selezionarne una sola in base a determinate condizioni;<\/li>\n\n\n\n<li><code><strong>canActivate<\/strong><\/code>: viene utilizzata per determinare se un utente pu\u00f2 attivare una determinata <strong>Route<\/strong>. Possiamo ad esempio utilizzarla per controllare l&#8217;accesso alle pagine riservate solo a determinati utenti;<\/li>\n\n\n\n<li><code><strong>canActivateChild<\/strong><\/code>: simile a <code><strong>canActivate<\/strong><\/code>, ma controlla anche l&#8217;accesso alle <strong>Route figlie<\/strong> di una <strong>Route<\/strong> principale. Viene attivata ad ogni navigazione verso una <strong>Route figlia<\/strong>, anche se parte da un&#8217;altra Route figlia;<\/li>\n\n\n\n<li><code><strong>canDeactivate<\/strong><\/code>: viene utilizzata per determinare se un utente pu\u00f2 uscire da una determinata <strong>Route<\/strong>. Possiamo ad esempio utilizzarla per chiedere conferma prima dell&#8217;abbandono di una pagina.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-text-align-left\"><strong>Nota:<\/strong> in origine, le <strong>Guardie<\/strong> erano implementate come <strong>servizi Injectable<\/strong>. In seguito all&#8217;introduzione della funzione <strong>inject()<\/strong>, \u00e8 stato possibile definirle come funzioni. Di conseguenza, <strong>le Guardie Injectable sono ad oggi deprecate<\/strong>.<\/p>\n<\/blockquote>\n\n\n<div class=\"wp-block-image caption-align-center\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-images-1.medium.com\/max\/1080\/1*0dCnqFBtqjJWDtkdYZUQQA.png\" alt=\"\"\/><figcaption class=\"wp-element-caption\">Ordine di di esecuzione delle <strong>Guardie<\/strong> durante la navigazione<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Inoltre, possiamo utilizzare delle funzioni chiamate <strong>Resolver<\/strong> per ricavare e\/o preparare i dati per una <strong>Route<\/strong>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { Route } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/router'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { MyService } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/my-feature'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span>\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">const<\/span> myRoute: Route = &#91;\n<\/span><\/span><span class='shcb-loc'><span>  path: <span class=\"hljs-string\">'my-feature'<\/span>,\n<\/span><\/span><mark class='shcb-loc'><span>  resolve: {\n<\/span><\/mark><mark class='shcb-loc'><span>    user: <span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> inject(MyService).getUserInfo(),\n<\/span><\/mark><mark class='shcb-loc'><span>    config: <span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> inject(MyService).getUserConfig()\n<\/span><\/mark><mark class='shcb-loc'><span>  }\n<\/span><\/mark><span class='shcb-loc'><span>];\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>L&#8217;uso dei <strong>Resolver<\/strong> \u00e8 un ottimo approccio per garantire la presenza dei dati prima di accedere ad una <strong>Route<\/strong>, e quindi eliminare la necessit\u00e0&nbsp;di gestire dati mancanti durante la visualizzazione di una pagina.<\/p>\n\n\n<div class=\"wp-block-image caption-align-center\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/cdn-images-1.medium.com\/max\/720\/1*4zp5L4gYVcs6ZvbMrRrCKQ.png\" alt=\"\" style=\"aspect-ratio:4.768211920529802;width:548px;height:auto\"\/><figcaption class=\"wp-element-caption\"><br>Ordine di esecuzione dei <strong>Resolver<\/strong> durante la navigazione.<\/figcaption><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<p>Ora che abbiamo ripassato le basi, non ci resta altro che vedere come proteggere le nostre <strong>Route<\/strong> reindirizzando i nostri utenti altrove.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-utilizzare-guardie-e-resolver-per-reindirizzare-la-navigazione\"><strong>Utilizzare Guardie e Resolver per reindirizzare la navigazione<\/strong><\/h2>\n\n\n\n<p>Come abbiamo visto, le <strong>Guardie<\/strong> Angular ci permettono di impedire l&#8217;accesso o l&#8217;abbandono ad una o pi\u00f9 <strong>Route<\/strong>, bloccando la navigazione.<\/p>\n\n\n\n<p>Tuttavia, per garantire un esperienza utente pi\u00f9 fluida, \u00e8 spesso preferibile reindirizzare la navigazione verso un altra <strong>Route<\/strong>.<\/p>\n\n\n\n<p>Grazie alle <strong>Guardie<\/strong>, possiamo ottenere questo risultato molto facilmente, avviando una nuova navigazione prima di bloccare quella corrente:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { inject } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { Route, Router } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/router'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { MyPage } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/pages\/my-page'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span>\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">const<\/span> route: Route = {\n<\/span><\/span><span class='shcb-loc'><span>  path: <span class=\"hljs-string\">'my-page'<\/span>,\n<\/span><\/span><span class='shcb-loc'><span>  component: MyPage,\n<\/span><\/span><span class='shcb-loc'><span>  canActivate: &#91;\n<\/span><\/span><span class='shcb-loc'><span>    <span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n<\/span><\/span><span class='shcb-loc'><span>      <span class=\"hljs-keyword\">const<\/span> router = inject(Router);\n<\/span><\/span><mark class='shcb-loc'><span>      router.navigate(&#91;<span class=\"hljs-string\">'.\/my-other-page'<\/span>]);\n<\/span><\/mark><mark class='shcb-loc'><span>      <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-literal\">false<\/span>;\n<\/span><\/mark><span class='shcb-loc'><span>    },\n<\/span><\/span><span class='shcb-loc'><span>  ],\n<\/span><\/span><span class='shcb-loc'><span>};\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>\u00c8 possibile ottenere un risultato simile utilizzando i <strong>Resolver<\/strong>, avviando una nuova navigazione all&#8217;interno di queste:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { Route, Router } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/router'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { MyService } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/my-feature'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span>\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">const<\/span> myRoute: Route = &#91;\n<\/span><\/span><span class='shcb-loc'><span>  path: <span class=\"hljs-string\">'my-feature'<\/span>,\n<\/span><\/span><span class='shcb-loc'><span>  resolve: {\n<\/span><\/span><span class='shcb-loc'><span>    user: <span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n<\/span><\/span><span class='shcb-loc'><span>      <span class=\"hljs-keyword\">const<\/span> router = inject(Router);\n<\/span><\/span><mark class='shcb-loc'><span>      router.navigate(&#91;<span class=\"hljs-string\">'.\/my-other-page'<\/span>]);\n<\/span><\/mark><mark class='shcb-loc'><span>      <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-literal\">null<\/span>;\n<\/span><\/mark><span class='shcb-loc'><span>    }\n<\/span><\/span><span class='shcb-loc'><span>  }\n<\/span><\/span><span class='shcb-loc'><span>];\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-reindirizzare-con-nbsp-urltree\"><strong>Reindirizzare<\/strong> con&nbsp;UrlTree<\/h3>\n\n\n\n<p>In alternativa, possiamo reindirizzare la navigazione facendo restituire a <strong>Guardie<\/strong> e <strong>Resolver<\/strong> un <code><strong>UrlTree<\/strong><\/code> che rappresenta la nuova <strong>Route<\/strong>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { inject } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { Route, Router, UrlTree } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/router'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { MyPage } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/pages\/my-page'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span>\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">const<\/span> route: Route = {\n<\/span><\/span><span class='shcb-loc'><span>  path: <span class=\"hljs-string\">'my-page'<\/span>,\n<\/span><\/span><span class='shcb-loc'><span>  component: MyPage,\n<\/span><\/span><span class='shcb-loc'><span>  canActivate: &#91;\n<\/span><\/span><span class='shcb-loc'><span>    <span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n<\/span><\/span><span class='shcb-loc'><span>      <span class=\"hljs-keyword\">const<\/span> router: Router = inject(Router);\n<\/span><\/span><mark class='shcb-loc'><span>      <span class=\"hljs-keyword\">const<\/span> urlTree: UrlTree = router.parseUrl(<span class=\"hljs-string\">'.\/my-other-page'<\/span>);\n<\/span><\/mark><mark class='shcb-loc'><span>      <span class=\"hljs-keyword\">return<\/span> urlTree;\n<\/span><\/mark><span class='shcb-loc'><span>    },\n<\/span><\/span><span class='shcb-loc'><span>  ],\n<\/span><\/span><span class='shcb-loc'><span>};\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Tuttavia, questa tecnica non permette di reindirizzare la navigazione utilizzando <strong><code><strong>NavigationExtras<\/strong><\/code><\/strong>, come invece permette la tecnica precedente:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span>canActivate: &#91;\n<\/span><\/span><span class='shcb-loc'><span>  <span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n<\/span><\/span><span class='shcb-loc'><span>    <span class=\"hljs-keyword\">const<\/span> router = inject(Router);\n<\/span><\/span><mark class='shcb-loc'><span>    router.navigate(&#91;<span class=\"hljs-string\">'.\/my-other-page'<\/span>], { skipLocationChange: <span class=\"hljs-literal\">true<\/span> });\n<\/span><\/mark><mark class='shcb-loc'><span>    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-literal\">false<\/span>;\n<\/span><\/mark><span class='shcb-loc'><span>  }\n<\/span><\/span><span class='shcb-loc'><span>]\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-reindirizzare-con-redirectcommand\"><strong>Reindirizzare<\/strong> con RedirectCommand<\/h3>\n\n\n\n<p>Per ovviare a questa carenza, <strong>Angular v18<\/strong> introduce una nuova classe <code><strong>RedirectCommand<\/strong><\/code> in grado di accettare <strong><code><strong>NavigationExtras<\/strong><\/code><\/strong>, con cui reindirizzare la navigazione in <strong>Guardie<\/strong> e <strong>Resolver<\/strong>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"TypeScript\" data-shcb-language-slug=\"typescript\"><span><code class=\"hljs language-typescript shcb-code-table shcb-line-numbers\"><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { inject } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/core'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { RedirectCommand, Route, Router, UrlTree } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'@angular\/router'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">import<\/span> { MyPage } <span class=\"hljs-keyword\">from<\/span> <span class=\"hljs-string\">'.\/pages\/my-page'<\/span>;\n<\/span><\/span><span class='shcb-loc'><span>\n<\/span><\/span><span class='shcb-loc'><span><span class=\"hljs-keyword\">const<\/span> route: Route = {\n<\/span><\/span><span class='shcb-loc'><span>  path: <span class=\"hljs-string\">'my-page'<\/span>,\n<\/span><\/span><span class='shcb-loc'><span>  component: MyPage,\n<\/span><\/span><span class='shcb-loc'><span>  canActivate: &#91;\n<\/span><\/span><span class='shcb-loc'><span>    <span class=\"hljs-function\"><span class=\"hljs-params\">()<\/span> =&gt;<\/span> {\n<\/span><\/span><span class='shcb-loc'><span>      <span class=\"hljs-keyword\">const<\/span> router: Router = inject(Router);\n<\/span><\/span><span class='shcb-loc'><span>      <span class=\"hljs-keyword\">const<\/span> urlTree: UrlTree = router.parseUrl(<span class=\"hljs-string\">'.\/my-other-page'<\/span>);\n<\/span><\/span><mark class='shcb-loc'><span>      <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">new<\/span> RedirectCommand(urlTree, { skipLocationChange: <span class=\"hljs-literal\">true<\/span> });\n<\/span><\/mark><span class='shcb-loc'><span>    },\n<\/span><\/span><span class='shcb-loc'><span>  ],\n<\/span><\/span><span class='shcb-loc'><span>};\n<\/span><\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">TypeScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">typescript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>L&#8217;introduzione di questa nuova classe <code><strong>RedirectCommand<\/strong><\/code> garantisce una grande manutenibilit\u00e0 per <strong>Guardie<\/strong> e <strong>Resolver<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn-images-1.medium.com\/max\/720\/1*UOhdg52AmZ4PVw50jCRJcQ.jpeg\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<p>Essendo stata progettata specificamente per questi casi d&#8217;uso, pu\u00f2 essere infatti facilmente estesa per accogliere eventuali nuovi parametri in futuro.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-grazie-per-aver-letto-questo-articolo-nbsp\">Grazie per aver letto questo articolo&nbsp;\ud83d\ude4f<\/h3>\n\n\n\n<p>Mi piacerebbe avere qualche feedback quindi grazie in anticipo per qualsiasi commento. <em>\ud83d\udc4b<\/em><\/p>\n\n\n\n<p>Infine, se ti \u00e8 piaciuto davvero tanto, <strong>condividilo<\/strong> con la tua community. \ud83d\udc4b\ud83d\ude01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nell\u2019era odierna dello sviluppo web, creare applicazioni dinamiche e interattive \u00e8 ormai la norma. La creazione di funzionalit\u00e0 esclusive per determinati utenti, o disponibili al verificarsi di specifiche condizioni, pu\u00f2 rivelarsi una sfida molto complessa. Per questo motivo, Angular ci offre un sistema di routing basato su rotte, in inglese Routes, regole e componenti, con&#8230; <a class=\"more-link\" href=\"https:\/\/www.codemotion.com\/magazine\/it\/frontend-it\/reindirizzare-guardie-e-resolver-in-angular-v18\/\">Read more<\/a><\/p>\n","protected":false},"author":200,"featured_media":27300,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","_uag_custom_page_level_css":"","_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[10265],"tags":[11586],"collections":[11708],"class_list":{"0":"post-27264","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-frontend-it","8":"tag-angular-it","9":"collections-dalla-community","10":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.5) - 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