Single page app spa template

Once your new project is created, Yeoman will automatically fetch its. Generated Angular application homepage. To a limited extent, it means your SPA can even work with JavaScript disabled in the browser, which is great for ensuring your app is accessible to all search engine crawlers.

As a quick but artificial demo to prove this is working, just try disabling JavaScript in your browser. Bear in mind that only navigation works without JavaScript, not any other user actions that are meant to execute JavaScript. The primary use case for server-side prerendering is to make your page appear extremely quickly, even if the user has a slow network connection or a slow mobile device, and even if your SPA codebase is very large.

This feature solves what is otherwise a significant drawback of large SPA frameworks. One of its powerful features is the ability, during development, to keep running in the background and incrementally recompile any modified code extremely quickly. Webpack dev middleware is integrated into these projects via SpaServices. As long as your application is running in the Development environment, you can modify your client-side code e. It sets up a live link between the Webpack dev middleware service and your application running in your local browser.

Whenever your source files change and the dev middleware provides an incremental update, HMR pushes it to your local browser immediately. It does this without causing a full page reload because that might wipe out useful state, such as any debugging session you have in progress.

It directly updates the affected modules in your running application. The purpose of this is to give you a faster, more productive development experience. If you cause a compiler error, its details will appear as an overlay in your browser.

Once you fix the compiler error, your application will resume, still preserving its previous in-memory state. Note: HMR is currently available in all the templates except for the Aurelia one. We aim to add it to the Aurelia template soon. Development , which includes source maps for easy debugging Production , which tightly minifies your code and does not include source maps. See the webpack.

But if you do want to run Webpack manually on the command line, you can run the following:. The first line repackages all of your vendor dependencies, i. You only need to run this if you modify your third-party dependencies, such as if you update to a newer version of your chosen SPA framework.

The second line running webpack with no parameters rebuilds your own application code. Separating your own application code from your vendor dependencies makes your builds much faster. These commands will produce development-mode builds. If you want to produce production-mode builds, then also pass the flag --env.

To deploy your application to production, you can use the publish feature which is built into dotnet command line tooling and Visual Studio. For example, on the command line, run:. This will produce a ready-to-deploy production build of your application. It includes. NET code compiled in Release mode, and invokes Webpack with the --env. Learn more about SpaServices and see other usage examples at the SpaServices online documentation. Why would you want to do this?

Primarily, because a huge number of useful, high-quality Web-related open source packages are in the form of Node Package Manager NPM modules. NPM is the largest repository of open-source software packages in the world, and the Microsoft.

NodeServices package means that you can use any of them in your ASP. NET Core application. Of course, this is how SpaServices works behind the scenes.

For example, to prerender Angular or React components on the server, it needs to execute your JavaScript on the server. It does this via NodeServices , which starts up a hidden Node. For this walkthrough, first create a new application with ASP. Remove the last two statements you added to app.

Take some time to go through the code. The links should now work. But we have a problem. To fix this, head over to server. Go back to the browser and try to refresh. You should now see the page render correctly.

The app should display a error message:. Open the. Feel free to increase the timeout value if you have a slower internet connection:. Copy the following code:. Run npm start or node server. After a few seconds, you should get the following output:. If you get something similar to the above, it means the code is working. The values will of course be different, since the rates change every day. Now comment out the test block and insert this code right before the statement that redirects all traffic to index.

When an error occurs, an error message is constructed and sent back to the client. You should see the same JSON result that was displayed in the console. We can now implement a view that will display this information in a neat, elegant table. This will be an indication to let users know that something is happening as the app fetches the data.

Replace the the first route. The first code block instantiates an API client for communicating with our proxy server.

The second block is a global function for handling errors. Its work is simply to display an error banner in case something goes wrong on the server side. We need the symbols endpoint to get a list of supported currency codes. This will help us get the conversion rate from one currency to another for free. Now our proxy server should be able to get symbols and conversion rates.

Feel free to use the test function to confirm both endpoints are working. Take note that the symbols data is in map format.

Select some currencies of your choosing and enter an amount. Then hit the Convert button:. NET Core App when it detects source file changes. You can start a watched build from the command-line with:. Our goals with the Single Page Templates is to provide a highly productive base that's ideal for developing small to medium-sized JavaScript Web Apps including just the core essentials that pack the most productive punch whilst adding minimal complexity and required configuration, whilst still remaining open-ended to easily plug-in other tools into your Webpack configuration you believe will improve your development workflow.

With these goals in mind we've hand-picked and integrated a number of simple best-of-breed technologies so you'll be immediately productive:. Vue, React, Angular 5 and Aurelia are pre-configured with Bootstrap v4 and font-awesome vector font icons whilst Angular 4 is preconfigured to use Material Design Lite and Material Design Icons providing a solution for utilizing resources which are all developed and maintained by Google.

NET Web App then either right-click on dtos. Or alternatively you can run the dtos Gulp task in Task Runner Explorer GUI, or if preferred, run the script on the command-line with:. All templates have multiple views with Routing enabled so they're all setup to develop multi-page navigable Single Page Apps out-of-the-gate. All templates are designed to be functionally equivalent utilizing a 3 page tabbed layout but implemented using their own idiomatic style so you'll be able to easily inspect and compare the structure and ergonomics of each JavaScript framework to evaluate the one you like best.

This works behind the scenes using a [FallbackRoute] to have all unknown routes return the home page so the route can be handled on the client to load the appropriate view. Angular and Vue are configured to use the Karma test runner with the headless phantomjs WebKit browser so the behavior of Components are tested in a real browser.

Tests can be run with the tests-run gulp task, or on the command-line using any of npm's testing conventions:. Each template also includes support for Live Testing which can be run in the background by clicking the tests-watch Gulp task or on the command-line with:.

Live testing automatically re-runs JavaScript tests after each change to provide instant feedback to detect when changes causes existing tests to fail. The Single Page App templates sources their client dependencies from npm which can take up to few minutes to finish downloading and installing. NET :. Unfortunately VS. NET ships with an outdated version of node. This can easily be resolved by configuring VS.

All templates can be installed using our dotnet-new tool, which if not already can be installed with:. Bootstrapped with Vue CLI 3. Live Demo: vue-spa. Bootstrapped with create-react-app. Live Demo: react-spa. Bootstrapped with Angular CLI.