Once the JavaScript is fully downloaded, the application bootstraps and replaces the static HTML version. At the same time, we still can use all the JavaScript features, that we might rely on.īecause the initial version of our application still does not contain JavaScript, we still have to be careful where to use it. That way, the page can be delivered much faster, than serving the framework right from the beginning. But this time, we also include script tags, that instruct the browser, to download the angular code, once the page is fully loaded. Using that method, we still render our HTML at the server. The other possible method could be called the dynamic one. Read more about that in this article about common mistakes with server-side rendering. There are, of course, ways around that, but that get's messy pretty quickly. If you do rely on JavaScript, for example, to show a popup, that can not work, is it is not included in the downloaded file. As we do not need any JavaScript, the size of the downloaded data is relatively small. That might be the case when rendering a blog post. It is a good thing, if we do not rely on JavaScript for our app. That HTML does only contain the HTML itself, plus the required CSS to display the page. We render the bare HTML of our page/application. The first one is the one you see in the picture above. Now we know the difference between both methods, it turns out, that there are multiple options for server-side rendering. That is three times the time, your app takes to download (approximately). That is more than three times the size! Now imagine your mobile users. It's just the size of angular JavaScript files. And that number does not contain the content of the page itself. On the other side, you will have a hard time bringing angular to under 150kb gzipped. An html document for a blog article might be aground 50kb gzipped. When we render angular on the server, all that has to travel over the wire is the html itself. The user sees nothing in his browser window until the full angular code is downloaded and bootstrapped. The angular framework has to be downloaded. The result is just a bunch of HTML, that the server can then send to the client. Because of that, it is also possible to generate that parsed HTML on the server. But rendering that HTML now requires the full angular (core) framework to be downloaded.Īs we learned before, angular is also capable of running on node.js servers. This JavaScript code will then create the parsed HTML elements at run-time in the browser. When you create your angular application, your templates are parsed from HTML markup to JavaScript code. But how does that even work? Rendering Angular on a ServerĪt its core, angular is just an html parser. This enables a whole set of new capabilities, like rendering angular to html on the server. Most importantly, it can be run on a server now. The names of the packages are platform-server and platform-browser.Īngular is now capable of running equally on most platforms. It now ships together with the core angular packages. Its main purpose was, to enable angular to run angular completely platform independent.īecause with version 4.0 of angular, angular universal got merged into the main framework. All you need to get started is in this angular universal tutorial.Īngular Universal once was a standalone project. You will also end up with a working template for server side rendering, you can use for your future angular adventures. Once we got the basics, we will dive right into code! By turning a basic angular-cli project into a functional universal application, you will not only see how it is done step-by-step. In this tutorial, I will show you exactly what angular universal is and how it works. In fact, creating a fully functional angular universal application will not take you longer than 1 hour! Once you understand how it actually works, setting up a working application will be easy for you. Well, it turns out, it is not that hard at all! Angular Angular Universal and Server Side Rendering (Step By Step)Īngular Universal is not easy to get right the first time.
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