Form validation is natively supported by the browser, but sometimes different browsers will handle things in a manner which makes relying on it a bit tricky. Even when validation is supported perfectly, there may be times when custom validations are needed and a more manual, Vue-based solution may be more appropriate.

vue js registration form example

Beneath that there is a paragraph that shows or hides itself based on an error state. This will render a simple list of errors on top of the form. Also note we fire the validation on submit rather than as every field is modified. The final thing to note is that each of the three fields has a corresponding v-model to connect them to values we will work with in the JavaScript. Fairly short and simple. We define an array to hold errors and set null values for the three form fields. The checkForm logic which is run on submit remember checks for name and age only as movie is optional.

If they are empty we check each and set a specific error for each. You can run the demo below. For the second example, the second text field age was switched to email which will be validated with a bit of custom logic.

You can play with this example here:. The total must equal First, the HTML. Note the set of inputs covering the five different features. Note the addition of. This tells Vue to cast the value to a number when you use it.

However, there is a bug with this feature such that when the value is blank, it turns back into a string. To make it a bit easier for the user, we also added a current total right below so they can see, in real time, what their total is. We set up the total value as a computed value, and outside of that bug I ran into, it was simple enough to setup. You can play with this here:. In my final example, we built something that makes use of Ajax to validate at the server. The form will ask you to name a new product and will then check to ensure that the name is unique.

We wrote a quick Netlify serverless action to do the validation. Now look at checkForm. In this version, we always prevent the form from submitting which, by the way, could be done in the HTML with Vue as well. You can see a basic check on this. You can run this demo below:. Switching to a prepackage library may impact the final size of your application, but the benefits could be tremendous.

Form Validation

You have code that is most likely heavily tested and also updated on a regular basis. Some examples of form validation libraries for Vue include:.

Stay at home and level up. Special Sponsor. Platinum Sponsors. Watch a free lesson on Vue School.Read that first if you are new to components.

Create dynamic forms with Vue JS

When registering a component, it will always be given a name. The name you give a component may depend on where you intend to use it. When using a component directly in the DOM as opposed to in a string template or single-file componentwe strongly recommend following the W3C rules for custom tag names all-lowercase, must contain a hyphen. This helps you avoid conflicts with current and future HTML elements.

You can see other recommendations for component names in the Style Guide. When defining a component with PascalCase, you can use either case when referencing its custom element.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.

Note, however, that only kebab-case names are valid directly in the DOM i. These components are globally registered. That means they can be used in the template of any root Vue instance new Vue created after registration. For example:. This even applies to all subcomponents, meaning all three of these components will also be available inside each other. This unnecessarily increases the amount of JavaScript your users have to download. For each property in the components object, the key will be the name of the custom element, while the value will contain the options object for the component.

Note that locally registered components are not also available in subcomponents. If you are, we have some special instructions and tips just for you.

In these cases, we recommend creating a components directory, with each component in its own file. For example, in a hypothetical ComponentB.

vue js registration form example

Many of your components will be relatively generic, possibly only wrapping an element like an input or a button. We sometimes refer to these as base components and they tend to be used very frequently across your components. Remember that global registration must take place before the root Vue instance is created with new Vue.

Stay at home and level up. Special Sponsor. Platinum Sponsors. Watch a free video lesson on Vue School.Sometimes the best examples towards learning a new framework is through a simple user login sample. Login involves many concepts, including forms, data binding, routing, and potentially HTTP to a remote service, all of which are core concepts in any web application. When the correct information is entered, the application will navigate to a potentially secure page.

The authorization status and logout is controlled by a parent component. For this application, the only required feature will be the vue-router. The above code represents our protected application area. For example, it should only be accessed if the user has logged in. Getting to the page is enough for us. More is happening in our login.

We know this page will have a login form so we need to initialize the variables that will bind it:. Both the username and password need to be present to move on. Using the v-model attribute, we can bind our variables in a two-way fashion. We can also bind our login function via the v-on:click attribute. Nothing fancy is happening in the UI. It more or less strings things together. The first thing that we do is initialize the variables that will be used throughout this component:.

Remember, we emitted an authentication status from the login. This will prevent anyone from trying to directly navigate to a protected page while not authenticated. Remember when we emitted the authentication status? When we want to sign out, we have the logout method which will set our authentication status to false.

We have a link in our parent component that will only show if we are not authenticated. This link will be our means to sign out of the application. This is a listener. In the login. More information on accessing or changing parent data from a child component can be found in my previous article titled, Access and Change Parent Variables from a Child Component with Vue.

More information on routing in a Vue. You just saw how to create simple login logic for a Vue. Using the vue-routersimple form binding, and interaction between components, we can make all this happen. Everything would pretty much remain the same.

vue js registration form example

Nic Raboy is an advocate of modern web and mobile development technologies. Nic writes about his development experiences related to making web and mobile development easier to understand. Subscribe to the newsletter for monthly tips and tricks on subjects such as mobile, web, and game development.

If you found this developer resource helpful, please consider supporting it through the following options:. Toggle navigation The Polyglot Developer. About Blog Courses Resources. Our website is made possible by displaying online advertisements to our visitors.Be sure to use an appropriate type on all inputs e. Here's a quick example to demonstrate BootstrapVue's form styles. Keep reading for documentation on supported components, form layout, and more.

Form controls within inline forms vary slightly from their default states. You may need to manually address the width and alignment of individual form controls with spacing utilities as shown below.

Assistive technologies such as screen readers will have trouble with your forms if you don't include a label for every input. For these inline forms, you can hide the labels using the. There are further alternative methods of providing a label for assistive technologies, such as the aria-labelaria-labelledby or title attributes. If none of these are present, assistive technologies may resort to using the placeholder attribute, if present, but note that use of placeholder as a replacement for other labelling methods is not advised.

The following helper components are available with the Form plugin:. Tip: Help text should be explicitly associated with the form control it relates to using the aria-describedby attribute. This will ensure that assistive technologies, such as screen readers, will announce this help text when the user focuses or enters the control. They rely on being placed after an input sibling and will show based on the browser native validation state of the input.

To force them to show, set the prop force-show to trueor bind the controls state to the state prop of the feedback helper, or set the was-validated class on a parent element such as a form. See the Validation section below for additional details. Use the optional Boolean prop tooltip to change the display from a block to a static tooltip style.

The feedback will typically appear below the form control. When this mode is enabled, it is important that the parent container have a position: relative: css style or position-relative class. Note that tooltip style feedback may, since its positioning is static, obscure other inputs, labels, etc. Use the feedback component's state prop bound to the state of the form control or the force-show prop to display the feedback.

All of the form controls support a state prop, which can be used to set the form control into one of three contextual states:. Refer to the Bootstrap v4 Form Validation Documentation for details on the new Bootstrap v4 validation states. Note: component aliases are only available when importing all of BootstrapVue or using the component group plugin.

You can import individual components into your project via the following named exports:. This plugin includes all of the above listed individual components.Webpack 4 is used to compile and bundle all the project files, styling of the example is done with Bootstrap 4. The tutorial example uses Webpack 4 to transpile the ES6 code and bundle the Vue components together, and the webpack dev server is used as the local web server, to learn more about webpack you can check out the webpack docs.

The Vue. All source code for the Vue. Click any of the below links to jump down to a description of each file in the tutorial along with it's code:. The helpers folder contains all the bits and pieces that don't fit into other folders but don't justify having a folder of their own.

Auth header is a helper function that returns an HTTP Authorization header containing the basic authentication credentials base64 username and password of the currently logged in user from local storage. If the user isn't logged in an empty object is returned. The fake backend is used for running the tutorial example without a server api backend-less. It monkey patches the fetch function to intercept certain api requests and mimic the behaviour of a real api.

Any requests that aren't intercepted get passed through to the real fetch function that's built into the browser. I created it so I could focus the tutorial on the Vue.

The vue router defines all of the routes for the application, and contains a function that runs before each route change to prevent unauthenticated users from accessing restricted routes. The helpers index file groups all helper exports together so they can be imported in other parts of the app using only the folder path, and enables importing multiple helpers in a single statement e.

The services layer handles all http communication with backend apis for the application, each service encapsulates the api calls for a content type e. CRUD operations.

Services can also have methods that don't wrap http calls, for example the userService. I like wrapping http calls and implementation details in a services layer, it provides a clean separation of concerns and simplifies the vue components that use the services. The user service encapsulates all backend api calls for performing CRUD operations on user data, as well as logging and out of the example application. The service methods are exported via the userService object at the top of the file, and the implementation of each method is located in the functions below.

In the handleResponse method the service checks if the http response from the api is Unauthorized and automatically logs the user out. This handles if the basic authentication credentials are invalid. The services index file groups all service exports together so they can be imported in other parts of the app using only the folder path, and enables importing multiple services in a single statement e.

The app folder is for vue components and other code that is used only by the app component in the tutorial application.

The app component is the root component for the vue. The home folder is for vue components and other code that is used only by the home page component in the tutorial application. The home page component is displayed after signing in to the application, it shows the signed in user's name plus a list of all users in the tutorial app. The users are fetched from the api by calling userService.

The login folder is for vue components and other code that is used only by the login page component in the tutorial application. The login page component renders a login form with username and password fields. It displays validation messages for invalid fields when the user attempts to submit the form. If the form is valid the userService. In the created function the userService. The main index html file contains the outer html for the whole tutorial application. When the app is started with npm startWebpack bundles up all of the vue.

An imperative guide to forms in Vue.js

The root index. The babel config file defines the presets used by babel to transpile the ES6 code. The babel transpiler is run by webpack via the babel-loader module configured in the webpack. The package. Full documentation is available on the npm docs website.Tutorial built with Vue. In this tutorial we'll go through an example of how to build a simple user registration and login system using Vue. This video shows how to setup a production ready web server from scratch on AWS, then deploy the example Vue.

The tutorial used in the video is available at Vue. For instructions on how to deploy the Vue. All source code for the Vue. Click any of the below links to jump down to a description of each file along with it's code:. The helpers folder contains all the bits and pieces that don't fit into other folders but don't justify having a folder of their own. If the user isn't logged in an empty object is returned. The fake backend is used for running the tutorial example without a server api backend-less.

It monkey patches the fetch function to intercept certain api requests and mimic the behaviour of a real api. Any requests that aren't intercepted get passed through to the real fetch function. The vue router defines all of the routes for the application, and contains a function that runs before each route change to prevent unauthenticated users from accessing restricted routes.

The helpers index file groups all helper exports together so they can be imported in other parts of the app using only the folder path, and enables importing multiple helpers in a single statement e. The services layer handles all http communication with backend apis for the application, each service encapsulates the api calls for a content type e.

CRUD operations. Services can also have methods that don't wrap http calls, for example the userService. I like wrapping http calls and implementation details in a services layer, it provides a clean separation of concerns and simplifies the vuex modules that use the services. The user service encapsulates all backend api calls for performing CRUD operations on user data, as well as logging and out of the example application.

The service methods are exported via the userService object at the top of the file, and the implementation of each method is located in the functions below. In the handleResponse method the service checks if the http response from the api is Unauthorized and automatically logs the user out.

vue js registration form example

This handles if the JWT token expires or is no longer valid for any reason. The services index file groups all service exports together so they can be imported in other parts of the app using only the folder path, and enables importing multiple services in a single statement e. In a nutshell: Vuex manages a centralised state store for the tutorial application that can be accessed from any component, mutations are committed to update sections of the state, and actions are dispatched to perform more complex operations that can include async calls and multiple mutations.

The vuex account module is in charge of the account section of the centralised state store. It contains actions for registering a new user, logging in and logging out of the tutorial application, and contains mutations for each of the lower level state changes involved for each account action. The initial logged in state of the user is set by checking if the user is saved in local storage, which keeps the user logged in if the browser is refreshed and between browser sessions.

The vuex alert module is in charge of the alert section of the centralised state store, it contains actions and mutations for setting a success or error alert message, and for clearing the alert. In this module each alert action just commits a single mutation so it would be possible to commit the mutations directly from your vue components and get rid of the actions. However I prefer to dispatch actions from everywhere for consistency rather than dispatching actions for some things and committing mutations for others.

This way also provides a bit more flexibility if you decide to expand an action to do more than just committing a mutation. The vuex users module is in charge of the users section of the centralised state store. It contains actions for fetching all users from the api and deleting a user, and contains mutations for each of the lower level state changes involved in each action.

Vue.js front end app, part 3: Authentication

The app folder is for vue components and other code that is used only by the app component in the tutorial application. The app component is the root component for the vue tutorial application, it contains the outer html, routes and global alert notification for the tutorial app. The home folder is for vue components and other code that is used only by the home page component in the tutorial application. The home page component is displayed after signing in to the application, it shows the signed in user's name plus a list of all users in the tutorial app.

The users are loaded into the vuex state by calling this. The login folder is for vue components and other code that is used only by the login page component in the tutorial application. The login page component renders a login form with username and password fields.A lot of topics in this one, so jump right in!

This series is composed of multiple articles! Click here for a table of contents. We did a lot of talking in the previous post, a bunch of drawing squares, and almost zero coding. And with good reason, too. We need to tell Vue to bind the inputs to the placeholder values. We can do that with the v-model directive:. Pay attention to the prevent qualifier: if we omitted it, Vue would run our method, but after that allow the event to bubble up to the browser, messing up our flow.

A couple months back when I wrote the original post on stack choices I said that we will use vue-resource. Since then it has come to my attention that the creator of Vue decided to retire vue-resource as far back as November We will need to tell Vue to use axios, and we will need to tell axios where our API is and how to authorize itself properly. That way I know this talks to the backend and has to do with this library by glancing at the directory structure itself.

When we tell axios to contact e. Thanks to this we can easily switch between local development seen here as default valuestaging and production. Secondly we have the headers. The contents of index.

There is one important twist. We instruct vue-axios to use our configured axios instance and attach to Vue. If we just used boilerplate code from GitHub, the axios instance that attaches to vue-axios would just have default settings.

One last thing to do: we need to make sure it actually attaches to our instance. Now our Vue instance knows it has two extensions: router and axios. We will expand it a bit to call axios:. You will notice that if the server decides to respond withbut does not generate a token, we fail either way.


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