Additionally, using a front-end router allows for the intentional transition of the browser path when certain browser events (i.e. clicks) occur on buttons or links. Vue itself doesn't come with front-end hashed routing. It supports mapping nested routes to nested components and offers fine-grained transition control. With Vue, developers are already composing applications with small building blocks building larger components. With vue-router added to the mix, components must merely be mapped to the routes they belong to, and parent/root routes must indicate where children should render. The /.nuxt/ directory is also called the build directory.
It's dynamically generated when you run the app locally or when you build it for production for SSR apps. Furthermore, it's fully managed by Nuxt.js, and you need not worry about it. Just know that Nuxt.js compiles the app files and creates this folder that's ready to be deployed on your server hosting. For instance, Nuxt.js creates a Vue Store instance, then it locates all the Vue components inside the /pages/ folder and creates a single route for each component.
Nuxt.js generates the router file and puts it inside the /.nuxt/ folder. Now, we can access the web prop in the HelloWorld component. To display it as a list in the template, we will use another directive called v-for.
The v-for directive is used to iterate through and render a list of items based on an array. The v-for directive requires a special syntax in the form of item in items, where "items" is the source data array and "item" is an alias for the array element being iterated on. We can then use the interpolation technique to display each item.
The CustomComponent defines a single property named value of type Object. Internally, it parses the object into data fields and does the mapping manually on the template. On every change of any of the fields, it prepares a payload for all the fields and emits a single input event, and attaches the payload. That's a lot of code to write for such a custom component. To demonstrate let's create a simple multiple-choice quiz application where we have the questions and it's options defined in a data property inside the Vue instance. The most important thing in this picture is the early return in the "created" method.
Nuxt has a globally accessible object "process" that shows us are we currently running on the server side or the client side. @Gary Woodfine I have created code snippet in which I extract only value once user select option. It is a workaround, but as I was saying, this is the default way in which input works. Since we've emitted additional events in form elements, there is no longer a need for .native - my mistake.
To do that, we'll add a data property to the App.vue component object, containing a ToDoItems field whose value is an array of todo items. While we'll eventually add a mechanism to add new todo items, we can start with some mock to do items. Each to-do item will be represented by an object with a name and a done property. At this point we've got a fully working component; we're now ready to add multiple ToDoItem components to our App.
This guide is going to build off of the previous one and demonstrate how to use the following cart methods; cart.add(), cart.retrieve(), cart.remove(), and cart.empty(). To do this you will be expanding on your Vuex store and utilizing Vuetify to build out a simple UI that visually demonstrates these methods. Finally, Nuxt.js allows you to write server middleware. These are usually stored inside the /server-middleware/ folder. You define a server-middleware, then you add this inside the serverMiddleware property of the nuxt.config.js file.
Nuxt.js makes sure to run it on the server-side only and before the vue-server-render kicks in and generates the Vue app. In the HTML template, we'll need to create the markup where our Vue app will be mounted (i.e. the element with the id of app). Within this markup, we'll use the v-for directive to render a list of tweets. Since tweets is the data collection we'll be iterating over, tweet will be an appropriate alias to use in the directive. In each rendered tweet-component, we'll also pass in the iterated tweet object as props for it to be accessed in the component.
Our initial form data is generated from the input components using a .reduce() function. In short, this function creates an object using the form field's unique name as a key. To be an effective to-do list, we need to be able to render multiple to-do items. This is a built-in Vue directive that lets us include a loop inside of our template, repeating the rendering of a template feature for each item in an array. We'll use this to iterate through an array of to-do items and display them in our app in separate ToDoItem components.
We do this through a loop instead of pushing the entire chunk onto the files array because otherwise we'd have groups based on what was selected. You can add validations here as well so the user doesn't upload the same file multiple times if you want as well. When uploading multiple files, it's very common that you accidentally select a file you do NOT want to upload. This sounds simple enough to resolve until you find out you can't directly edit the FileList object for security reasons. However, you can transform it and edit the new list as an array and allow users to change the files they want uploaded. Then, define the basicConfig() function with a function body that returns the local options array variable.
Finally, define the plug-in function that in turn injects the basicConfig() function into both the server-side and client-side channels of the Nuxt.js app. The addPlugin() function internally generates a new plug-in file based on the specified template, and pushes the plug-in into the Nuxt.js context. To access the nuxt.config.js file content inside a module, you use the this.options() function. The module is kept simple and the idea is to show how to build a module skeleton and run it successfully.
Nuxt.js is a Web development framework that builds on top of the Vue.js framework. It's not a new framework and nor does it add much to the Vue.js codebase. More importantly, it generates a highly optimized bundle of your app.
Nuxt.js has one more structure-related feature that is very interesting – layouts. Vue.js applications have the main App.vue file, which is the main root component wrapper for all application components. Nuxt.js uses layouts, where every layout serves as an individual wrapper for application components. By default, all Nuxt.js pages are using the default.vue layout. Remember that when working with objects as options, you have to transform the received tag string to an object that matches the objects structure of the options list.
In this example, the addTag method generates an object with a unique code property. If you're worried about not being in control of the router, don't be. This default setup works great for a wide variety of projects, provided they are well structured. However, there are some cases where you may need to add more routes to the router than Nuxt automatically generates for you or restructure them. Nuxt provides a way to customize the router instance in the config, allowing you to add new routes and customize generated routes. You can also edit the core functionality of the router instance, including extra options added by Nuxt.
So if you do encounter an edge case, you still have the flexibility to find the appropriate solution. There is also a nuxt.config.js file at the project root. This allows you to customize a bunch of features that Nuxt provides. By default, it sets the header tags, loading bar color, and ESLint rules for you. If you're eager to see what you can configure, here's the documentation; we will be covering some options in this article. The nuxt.config.js file exists to contain all of your custom configuration.
Nuxt.js comes with a set of configurations and this file helps you amend the existing configurations and add more. For instance, you can change the meta tags, title, and links for the main page Head tag. As you've seen before, you also use this configuration file to list your plug-ins, middleware, and other related configurations that directly affect your app. Nuxt.js includes the /.nuxt/components/nuxt-error.vue component. It displays this component whenever an error occurs in the app (404, 500, etc.). Nuxt.js gives you the chance to customize this error page to fit your needs and requirements.
SSR is fetching AJAX data and rendering Vue.js components into HTML strings on the server (Node.js). It sends them directly to the browser when all asynchronous logic is done, and then finally serves the static markup into a fully interactive app on the client. This feature allows for great parsing through DOM elements with the Google SEO parser.
SEO parser is parsing through DOM elements with enormous speed immediately when the website DOM is loaded. The app component contains the hardcoded users array that is rendered with the v-for directive in template. The users array is declared as a data property of the Vue component so the template can see it. Before we do that, there's one other piece of syntax to know about that is used with v-for, the key attribute. To help Vue optimize rendering the elements in the list, it tries to patch list elements so it's not recreating them every time the list changes. To make sure it is re-using list elements appropriately, it needs a unique "key" on the same element that you attach v-for to.
Vue uses an HTML-based template syntax that allows binding the rendered DOM to the underlying Vue instance's data. All Vue templates are valid HTML that can be parsed by specification-compliant browsers and HTML parsers. Vue compiles the templates into virtual DOM render functions.
A virtual Document Object Model (or "DOM") allows Vue to render components in its memory before updating the browser. Combined with the reactivity system, Vue can calculate the minimal number of components to re-render and apply the minimal amount of DOM manipulations when the app state changes. Just to stress this again, we never had to npm install vuex, as it is already included in the Nuxt package. When you add an index.js file to the store directory, all those methods are then opened up to you automatically. This property represents the HTML Head of the page in Nuxt.js.
The head property applies to all pages in the Nuxt.js app. However, you can still override them on the page level as you will see shortly. What's unique about Nuxt.js is enforcing convention over configuration strategy. In Nuxt.js, you don't need to write a lot of configuration files. Instead, you organize the folder structure in a way that Nuxt.js can understand and build the final bundle of the app accordingly.
For example, in Nuxt.js, you don't write a configuration file for the routes available in the app. Rather, you create Vue.js components inside the /page/ folder, and consequently, Nuxt.js creates a single route for each Vue.js component in that folder. If these features are required for your next project, I assure you that Nuxt.js will be an excellent choice. Our tweet-component elements will now transition appropriately between locations when a shuffle is invoked. Type some information in the input fields and click "Shuffle! Since we haven't opted to using the key attribute, Vue has not created unique bindings to each tweet node.
As a result, when we're aiming to reorder the tweets, Vue takes the more performant saving approach to simply change data in each element. Since the temporary DOM state (i.e. the inputted text) remains in place, we experience this unintended mismatch. However, in certain instances where our v-for list depends on DOM state and/or child component state, this can cause some unintended behavior. InstantSearch code uses ES modules, yet it needs to be executed in Node.js. That's why we need to let Nuxt know that those files should be transpiled during the build. Now that we've configured our vue-instantSearch plugin, let's create a search component.
When the options array contains objects, vue-select returns the whole object as dropdown value upon selection. This approach makes no assumptions about the data you need, and provides a lot of flexibility. However, there will be situations where you just need to return a single key from an object. Vue components are written as a combination of JavaScript objects that manage the app's data and an HTML-based template syntax that maps to the underlying DOM structure. For installation, and to use some of the more advanced features of Vue , you'll need a terminal with node + npm installed.
A traditional disadvantage of single-page applications is the inability to share links to the exact "sub" page within a specific web page. To solve this problem, many client-side routers delimit their dynamic URLs with a "hashbang" (#!), e.g. page.com/#! However, with HTML5 most modern browsers support routing without hashbangs. It was created by Evan You, and is maintained by him and the rest of the active core team members.
Next, we need a create the openModal method in the script section. So, we will use an event bus to pass data open a modal in the index.vue page from the layout/default.vue file. You might think how is it better than using v-model binding. The difference is that you can check user form for errors, assign it to multiple data components without using Vue.js watchers and so on.
If you've ever built a Vue.js application, whether that be web or mobile, you've probably come across Vuex when searching for data storage related information. When it comes to the web, the common tutorial around Vuex includes browser local storage or similar, where Vuex handles all of the state rules between components. I just wonder what would be a good practice in case I want in my SSR application have layout with navigation component (ex. some categories/menu from API), then nuxt then footer . Then on page loaded via nuxt in layout I also want to have the same data that was already fetched in navigation component.
Plus some info about caching strategies so I wouldn't need to call API for footer/navigation components for every users during server request. We want the server to do as much as possible first, but sometimes it doesn't have access to the information it needs, which results in the work being done client-side instead. Or worse, when the final content presented by the client is different from what the server expected, the client is told to rebuild it from scratch. This is a big indication that something is wrong with the application logic.
Thankfully, an error will be generated in your browser's console if this starts to happen. Any Vue components in this directory are automatically added to vue-router based on their filenames and the directory structure. Normally I would have a separate Pages directory anyway and have to manually register each of those components in another router file. This router file can become complex for larger projects and may need splitting to maintain readability. Inside the template file, based on the options passed via the addPlugin() function, you can push new items into a locally defined options array variable. Nuxt.js uses this component the next time it needs to render the error page.
