Mastering Form Validation in Vue.js: A Step-by-Step Guide
Why Form Validation Matters
When building forms to collect data from customers, validating input fields is crucial. It gives you complete control over the customer experience and guides users through the desired path. To ensure quality assurance, validation should be conducted on both the client and server sides of your application.
Getting Started with Vue.js Form Validation
Creating forms in Vue applications is similar to building them in HTML5, requiring little to no additional skills. This tutorial is designed for developers of all stages, including beginners.
Prerequisites
Before diving in, make sure you have:
- Node.js version 10.x and above installed
- A code editor like Visual Studio Code
- Vue’s latest version installed globally on your machine
- Vue CLI 3.0 installed on your machine
- A downloaded Vue starter project, unzipped and updated with the latest dependencies
Introducing Vuelidate
Vuelidate is a lightweight, model-based validation library for Vue applications. It adds validation rules to a validation object, working seamlessly with libraries like Moment and VueX. With support for collection validation, nested models, and function composition, Vuelidate is a powerful tool for handling form validation.
Setting Up Vuelidate with Vue CLI
Create a new Vue application, navigate to the project folder, and install Vuelidate using your package manager. Register it as a plugin in your main.js file to use it in your Vue app.
Exploring the Vue GUI
Vue also offers a graphical user interface for managing Vue.js applications. Access it by running a command in your terminal, and import your existing project or create a new one. The GUI dashboard allows you to manage dependencies, including Vuelidate, and run your application.
Building a Simple Form with Vuelidate
Create a simple contact form and add validation rules using Vuelidate’s built-in validators. In the script section of your app.vue file, import validators like minLength, required, and between. In the template section, use the v-model directive to bind input data and specify validation rules.
The Power of Vuelidate
With Vuelidate, you can easily handle basic form input validation and create logic around your model. The full code for this project is available on GitHub.
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