What is Blazor CSS isolation? How do you enable it for your application?
Blazor CSS isolation is a process that occurs at build time. By utilizing CSS isolation, you can restrict the scope of CSS files or styles to specific components within your app, preventing them from affecting other components globally. The CSS selectors are rewritten by Blazor to match markup rendered by the component. These rewritten CSS files are loaded as static assets in the {{Your_App_Name}}.styles.css.The static file name is referenced inside the tag of the _Host.cshtml file.[_Host.cshtml] / [index.html] <head> // . . . <link href=”{{Your_App_Name}}.styles.css” rel=”stylesheet” /></head> Follow these steps to enable CSS isolation for a Blazor application. Create a Blazor Server or WebAssembly application. To enable CSS isolation, create a razor.css file matching the .razor file for the component in the same folder.For example, if your component is named “Isolate.razor,” create a file alongside the component named “Isolate.razor.css.” The Isolate.razor.css file is placed in the same folder as the Isolate.razor component.[Pages/Isolate.razor] @page “/isolate” <h1>Hello, World</h1><p>Welcome to your new app</p> [Pages/Isolate.razor.css] h1 { color: blue; font-style: italic; text-shadow: 2px 2px 2px gray;} The Isolate.razor.css styles work only for the Isolate.razor component. Refer to this documentation for more details. View Sample in GitHub
How do you detect navigation events in Blazor WebAssembly?
The LocationChanged event handler is triggered when there is a change in the navigation location. In the example below, a JavaScript interop function is used to display an alert to the user whenever the navigation location changes: Refer to this documentation for more details.
How do I redirect users to the login page when a session has timed out in Blazor?
To redirect users to your login page when their session has expired, create a RedirectLogin Razor component and implement the AuthenticationState to check whether sessions are expired or valid.Follow these steps to redirect to a login page when sessions time out in Blazor: Create a RedirectLogin component to redirect users to a login page when their session has expired. [RedirectLogin.razor] Now, initialize the RedirectLogin component in App.razor to identify whether a session is expired or valid. [App.razor] View Sample in GitHub
How do I redirect a page to the login if the user is not authenticated in Blazor WebAssembly?
To redirect to the login page when a user is not authenticated in Blazor WebAssembly: Create a login page component. Add the login page component to the NotAuthorized tag. Follow these steps to redirect to the login page if the user is not authenticated: Create a login page component for redirection.[LoginRedirect.razor] @inject NavigationManager UriHelper@code { protected override void OnInitialized() { UriHelper.NavigateTo(“login”); } } Now add the LoginRedirect component to the NotAuthorized tag to redirect to the login page if the user is not authorized.[App.razor] <Router AppAssembly=”@typeof(Program).Assembly” PreferExactMatches=”@true”> <Found Context=”routeData”> <AuthorizeRouteView RouteData=”@routeData” DefaultLayout=”@typeof(MainLayout)”> <NotAuthorized> <LoginRedirect /> </NotAuthorized> </AuthorizeRouteView> </Found> <NotFound> <LayoutView Layout=”@typeof(MainLayout)”> <p>Sorry, there’s nothing at this address.</p> </LayoutView> </NotFound> </Router> Refer to this documentation for more details. View Sample in GitHub
How do I get a browser’s culture in Blazor WebAssembly?
To get a browser’s culture in Blazor WebAssembly, call the (navigator.language) property in JavaScript using the JavaScript interop function in Blazor. It will return the current browser’s language version. Follow this code to get the browser’s culture in Blazor WebAssembly. [Index.razor] [index.html]
