Vue 3 Form Validation: Techniques, Libraries, and Best Practices

Brief Overview of Form Validation in Web Development

Form validation is an essential aspect of web development that ensures the integrity, accuracy, and security of data submitted by users through web forms. It involves checking the input values against a set of predefined rules or criteria to ensure they meet the required format, length, and type. Form validation can be performed on the client-side, server-side, or both. In this section, we will discuss form validation in web development in great detail with real examples and step-by-step instructions.

Detailed article: Vue 3: A Comprehensive Guide to the Latest Version of Vue.js

Client-side validation is performed using JavaScript, while server-side validation is done using server-side scripting languages like PHP, Python, or Ruby. Both methods have their pros and cons:

• Client-side validation:
  • Provides instant feedback to users
  • Reduces server load
  • However, it can be bypassed by disabling JavaScript or using browser developer tools
• Server-side validation:
  • More secure and reliable
  • Cannot be bypassed by users
  • However, it requires server resources and may increase response times

A popular approach is to use both client-side and server-side validation, leveraging the advantages of each method. For example, you can use client-side validation to provide instant feedback and improve user experience, while server-side validation ensures data integrity and security.

Real Example: Email Validation

Consider a simple email input field in a web form. Proper validation of email addresses is crucial for various reasons, such as ensuring the validity of the email before sending newsletters or account activation emails. A typical email validation workflow involves the following steps:

1. Client-side validation: Use JavaScript to check if the email format is correct, using a regular expression.

   function validateEmail(email) {
     const regex = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
     return regex.test(email);
   }

2. Server-side validation: If the email format is correct, the server-side script checks for additional criteria, such as checking if the email is already registered or if the domain is valid.

To learn more about form validation in web development, visit the following resources:

• Mozilla Developer Network: Form data validation
• W3Schools: JavaScript Form Validation

Introduction to Vue 3 and its Significance in Modern Web Applications

Vue.js is a popular JavaScript framework for building modern web applications. Vue 3, the latest version of the framework, brings several improvements and new features that make it even more powerful and developer-friendly. Some of the notable features in Vue 3 include:

• Composition API: A new way to organize and reuse code, making it easier to manage large-scale applications.
• Improved performance: Vue 3 has better performance due to its smaller bundle size and optimized rendering engine.
• Enhanced TypeScript support: Vue 3 offers better TypeScript integration, making it easier to use TypeScript in Vue projects.
• Custom Renderer API: This feature allows developers to create custom renderers, opening up possibilities for Vue to be used in various environments, such as Web Workers or native mobile apps.

To get started with Vue 3, follow these step-by-step instructions:

1. Install Node.js and npm (if not already installed) from the official Node.js website.
2. Install the Vue CLI globally by running the following command in your terminal or command prompt:

   npm install -g @vue/cli

3. Create a new Vue 3 project by running:

   vue create my-vue3-project

   Select the Vue 3 preset when prompted, or manually configure your project to use Vue 3.

4. Change to the project directory and start the development server:

   cd my-vue3-project
   npm run serve

5. Open your web browser and navigate to http://localhost:8080 to see your Vue 3 app running.

For more detailed instructions and examples, visit the official Vue 3 documentation.

Importance of Form Validation in Vue 3 Applications

Form validation is crucial in Vue 3 applications for several reasons:

1. User experience: Proper form validation provides real-time feedback to users, helping them correct mistakes before submitting the form. This leads to a better user experience and increases the chances of successful form submissions.
2. Data integrity: Validating user inputs ensures that only accurate and well-formatted data is sent to the server, reducing the risk of data corruption or processing errors.
3. Security: Validating input data helps prevent security vulnerabilities, such as SQL injection attacks or cross-site scripting (XSS), by ensuring that potentially harmful data is not submitted through forms.
4. Reduced server load: Client-side validation in Vue 3 applications can offload some of the validation tasks from the server, improving performance and reducing server load.

Real Example: Vue 3 Registration Form

Let’s create a simple registration form using Vue 3 to demonstrate form validation:

1. Create a new Vue component called RegistrationForm.vue in your project’s src/components directory.
2. Add the following template to RegistrationForm.vue:

   <template>
     <form @submit.prevent="submitForm">
       <div>
         <label for="username">Username:</label>
         <input type="text" id="username" v-model="username" @input="validateUsername" />
         <p v-if="errors.username">{{ errors.username }}</p>
       </div>
       <div>
         <label for="email">Email:</label>
         <input type="email" id="email" v-model="email" @input="validateEmail" />
         <p v-if="errors.email">{{ errors.email }}</p>
       </div>
       <button type="submit">Register</button>
     </form>
   </template>

3. Add the following script to RegistrationForm.vue:

   <script>
   export default {
     data() {
       return {
         username: "",
         email: "",
         errors: {
           username: "",
           email: ""
         }
       };
     },
     methods: {
       validateUsername() {
         this.errors.username = this.username.length >= 5 ? "" : "Username must be at least 5 characters.";
       },
       validateEmail() {
         const regex = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
         this.errors.email = regex.test(this.email) ? "" : "Invalid email address.";
       },
       submitForm() {
         this.validateUsername();
         this.validateEmail();
   
         if (!this.errors.username && !this.errors.email) {
           // Submit the form data to the server
           console.log("Form submitted:", { username: this.username, email: this.email });
         }
       }
     }
   };
   </script>

In this example, we’ve created a simple registration form with client-side validation for the username and email fields.

Understanding Vue 3 Form Validation

Vue 3 form validation is the process of ensuring the correctness, consistency, and security of user inputs in a Vue 3 application. It involves checking input values against predefined rules or criteria to ensure they meet the required format, length, and type. In this section, we will delve deep into the basics of Vue 3 form validation, its workflow, and the benefits of using Vue 3 for form validation.

Basics of Vue 3 Form Validation

Vue 3 form validation typically involves two primary steps:

1. Model Binding: Binding the form input elements to data properties in the Vue component using v-model.
2. Validation Logic: Writing custom validation methods or using Vue 3 validation libraries to validate the input data against specific rules or criteria.

Let’s create a simple example to illustrate the basics of Vue 3 form validation:

1. Create a new Vue component called LoginForm.vue in your project’s src/components directory.
2. Add the following template to LoginForm.vue:

   <template>
     <form @submit.prevent="submitForm">
       <div>
         <label for="email">Email:</label>
         <input type="email" id="email" v-model="email" @input="validateEmail" />
         <p v-if="errors.email">{{ errors.email }}</p>
       </div>
       <button type="submit">Login</button>
     </form>
   </template>

3. Add the following script to LoginForm.vue:

   <script>
   export default {
     data() {
       return {
         email: "",
         errors: {
           email: ""
         }
       };
     },
     methods: {
       validateEmail() {
         const regex = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
         this.errors.email = regex.test(this.email) ? "" : "Invalid email address.";
       },
       submitForm() {
         this.validateEmail();
   
         if (!this.errors.email) {
           // Submit the form data to the server
           console.log("Form submitted:", { email: this.email });
         }
       }
     }
   };
   </script>

In this example, we’ve created a simple login form with client-side validation for the email field using the validateEmail method. We display an error message below the input field if the validation fails. The form submission is prevented using @submit.prevent and only proceeds if there are no validation errors.

Checkbox

Single checkbox, boolean value:

<input type="checkbox" id="checkbox" v-model="checked" />
<label for="checkbox">{{ checked }}</label>

export default {
  data() {
    return {
      checkedNames: []
    }
  }
}

<div>Checked names: {{ checkedNames }}</div>

<input type="checkbox" id="jack" value="Jack" v-model="checkedNames">
<label for="jack">Jack</label>

<input type="checkbox" id="john" value="John" v-model="checkedNames">
<label for="john">John</label>

<input type="checkbox" id="mike" value="Mike" v-model="checkedNames">
<label for="mike">Mike</label>

<div>Selected: {{ selected }}</div>

<select v-model="selected">
  <option disabled value="">Please select one</option>
  <option>A</option>
  <option>B</option>
  <option>C</option>
</select>

• Vue.js Guide: Form Validation
• Vue.js Cookbook: Form Validation

Vue 3 Form Validation Workflow

The Vue 3 form validation workflow typically consists of the following steps:

1. Bind the form input elements to the Vue component’s data properties using v-model.
2. Create custom validation methods or use Vue 3 validation libraries to define the validation rules for each input field.
3. Listen to user input events (e.g., @input, @blur) and trigger the appropriate validation methods.
4. Show validation error messages or visual indicators when validation fails.
5. Prevent form submission if there are any validation errors, and submit the form data to the server when validation passes.

By following this workflow, you can create a robust and user-friendly form validation experience in your Vue 3 application.

Benefits of using Vue 3 for Form Validation

There are several advantages to using Vue 3 for form validation in your web applications:

1. Reactivity: Vue’s reactive data system ensures that validation error messages and visual indicators are updated in real-time as users interact with the form.
2. Component-based architecture: Vue’s component-based architecture allows you to create reusable validation components, making it easier to maintain and scale your application.
3. Customizable: Vue 3 form validation can be easily customized using custom validation methods or third-party libraries to suit your specific requirements.
4. Improved user experience: Real-time validation feedback provided by Vue 3 improves the user experience, guiding users to enter the correct information and reducing the likelihood of submission errors.
5. Integration with popular libraries: Vue 3 can be easily integrated with popular validation libraries such as Vuelidate or Vee-Validate, offering advanced validation features and simplifying the development process.

By leveraging Vue 3’s capabilities, developers can create robust and user-friendly form validation experiences that enhance the overall functionality and usability of their web applications.

Vue 3 Form Validation Techniques

In this section, we will explore various form validation techniques in Vue 3, such as built-in validation methods, custom validation rules, async validation, conditional validation, and dynamic validation rules. We will provide real examples and detailed step-by-step instructions for each technique to help you implement them effectively in your Vue 3 applications.

Built-in Vue 3 Form Validation Methods

Vue 3 does not include built-in form validation methods, but you can leverage HTML5 form validation attributes, such as required, minlength, maxlength, min, max, and pattern, to add basic validation to your forms. Here’s an example:

<template>
  <form @submit.prevent="submitForm">
    <div>
      <label for="email">Email:</label>
      <input type="email" id="email" v-model="email" required />
    </div>
    <button type="submit">Submit</button>
  </form>
</template>

For more information on using HTML5 form validation attributes, refer to the MDN Web Docs.

Custom Validation Rules

To create custom validation rules in Vue 3, you can write your own validation methods and use them in combination with Vue’s event listeners and data properties. Here’s an example:

1. Create a new Vue component called CustomValidationForm.vue in your project’s src/components directory.
2. Add the following template to CustomValidationForm.vue:

   <template>
     <form @submit.prevent="submitForm">
       <div>
         <label for="username">Username:</label>
         <input type="text" id="username" v-model="username" @input="validateUsername" />
         <p v-if="errors.username">{{ errors.username }}</p>
       </div>
       <button type="submit">Submit</button>
     </form>
   </template>

3. Add the following script to CustomValidationForm.vue:

   <script>
   export default {
     data() {
       return {
         username: "",
         errors: {
           username: ""
         }
       };
     },
     methods: {
       validateUsername() {
         this.errors.username = this.username.length >= 5 ? "" : "Username must be at least 5 characters.";
       },
       submitForm() {
         this.validateUsername();
   
         if (!this.errors.username) {
           // Submit the form data to the server
           console.log("Form submitted:", { username: this.username });
         }
       }
     }
   };
   </script>

In this example, we’ve created a simple form with a custom validation rule for the username field. The validateUsername method enforces a minimum length of 5 characters for the username.

Async Validation

Async validation is useful when you need to validate user inputs against a remote server or API. Here’s an example using the axios library to check if an email address is already registered:

1. Install the axios library:

   npm install axios

2. Create a new Vue component called AsyncValidationForm.vue in your project’s src/components directory.
3. Add the following template to AsyncValidationForm.vue:

<template>
  <form @submit.prevent="submitForm">
    <div>
      <label for="email">Email:</label>
      <input type="email" id="email" v-model="email" @blur="validateEmail" />
      <p v-if="errors.email">{{ errors.email }}</p>
    <div>
    <button type="submit" :disabled="isLoading">Submit</button>
  </form>
</template>

4. Add the following script to AsyncValidationForm.vue:

   <script>
   import axios from "axios";
   
   export default {
     data() {
       return {
         email: "",
         errors: {
           email: ""
         },
         isLoading: false
       };
     },
     methods: {
       async validateEmail() {
         this.isLoading = true;
         try {
           const response = await axios.post("https://your-api-url/check-email", { email: this.email });
           this.errors.email = response.data.isRegistered ? "Email is already registered." : "";
         } catch (error) {
           this.errors.email = "Error occurred during email validation.";
         }
         this.isLoading = false;
       },
       submitForm() {
         this.validateEmail().then(() => {
           if (!this.errors.email) {
             // Submit the form data to the server
             console.log("Form submitted:", { email: this.email });
           }
         });
       }
     }
   };
   </script>

In this example, we’ve created a form with async validation for the email field. The validateEmail method checks if the email address is already registered by making an API request using axios.

Conditional Validation

Conditional validation is useful when you need to apply validation rules based on the state of other form inputs. Here’s an example of conditional validation for a password confirmation field:

<template>
  <form @submit.prevent="submitForm">
    <div>
      <label for="password">Password:</label>
      <input type="password" id="password" v-model="password" />
    </div>
    <div>
      <label for="confirmPassword">Confirm Password:</label>
      <input type="password" id="confirmPassword" v-model="confirmPassword" @input="validateConfirmPassword" />
      <p v-if="errors.confirmPassword">{{ errors.confirmPassword }}</p>
    </div>
    <button type="submit">Submit</button>
  </form>
</template>

<script>
export default {
  data() {
    return {
      password: "",
      confirmPassword: "",
      errors: {
        confirmPassword: ""
      }
    };
  },
  methods: {
    validateConfirmPassword() {
      this.errors.confirmPassword = this.confirmPassword === this.password ? "" : "Passwords do not match.";
    },
    submitForm() {
      this.validateConfirmPassword();

      if (!this.errors.confirmPassword) {
        // Submit the form data to the server
        console.log("Form submitted:", { password: this.password, confirmPassword: this.confirmPassword });
      }
    }
  }
};
</script>

In this example, the validateConfirmPassword method validates the password confirmation field only if the password field has a value.

Dynamic Validation Rules

Dynamic validation rules allow you to create flexible validation logic that can adapt to different situations. Here’s an example of dynamic validation rules for a form with optional shipping and billing addresses:

<template>
  <form @submit.prevent="submitForm">
    <!-- Shipping Address Fields -->
    <!-- ... -->

    <div>
      <label>
        <input type="checkbox" v-model="useSeparateBillingAddress" />
        Use separate billing address
      </label>
    </div>

    <div v-if="useSeparateBillingAddress">
      <!-- Billing Address Fields -->
      <!-- ... -->
    </div>

    <button type="submit">Submit</button>
  </form>
</template>

<script>
export default {
  data() {
    return {
      useSeparateBillingAddress:
      false,
      shippingAddress: "",
      billingAddress: "",
      errors: {
        shippingAddress: "",
        billingAddress: ""
      }
    };
  },
  methods: {
    validateShippingAddress() {
      this.errors.shippingAddress = this.shippingAddress.trim() === "" ? "Shipping address is required." : "";
    },
    validateBillingAddress() {
      if (this.useSeparateBillingAddress) {
        this.errors.billingAddress = this.billingAddress.trim() === "" ? "Billing address is required." : "";
      } else {
        this.errors.billingAddress = "";
      }
    },
    submitForm() {
      this.validateShippingAddress();
      this.validateBillingAddress();

      if (!this.errors.shippingAddress && !this.errors.billingAddress) {
        // Submit the form data to the server
        console.log("Form submitted:", { shippingAddress: this.shippingAddress, billingAddress: this.billingAddress });
      }
    }
  }
};
</script>

In this example, the form has an optional billing address section that is displayed only if the user selects the “Use separate billing address” checkbox. The validateBillingAddress method applies the validation rule for the billing address field only if useSeparateBillingAddress is true.

Dynamic validation rules enable you to create more adaptable and user-friendly forms that cater to different user scenarios.

To learn more about form validation in Vue 3, refer to the following resources:

• Vue.js Guide: Forms
• Vuelidate: Documentation
• Vee-Validate: Documentation

By exploring these techniques, you can enhance your Vue 3 applications with powerful and flexible form validation capabilities that cater to various user scenarios and requirements.

Exploring Vue 3 Validation Libraries

When building web applications with Vue 3, there are several popular libraries available for form validation. In this article, we will explore two of the most widely-used libraries: Vuelidate and Vue Validate. We will discuss their features, set up processes, and common use cases.

Vuelidate

Introduction to Vuelidate

Vuelidate is a model-based validation library designed specifically for Vue.js projects. It provides a simple and powerful way to add form validation to your applications, thanks to its built-in validators. Some of the basic validators included in Vuelidate are:

• required – value cannot be empty
• minLength/maxLength – enforces a minimum or maximum length for a value
• email – value must be in a valid email address format
• alpha – value can only contain alphabet characters
• numeric – value can only contain numbers

This is just a short list of the validators Vuelidate offers. For a complete list, be sure to check out the:

Vuelidate Documentation

Vuelidate GitHub Repository

A Basic Vue Form Validation Example with Vuelidate

Now that we have an idea of what Vuelidate is and what it can do, let’s implement it in a simple user registration form example. We will start with the Options API and then see how to convert it to the Composition API.

1. First, let’s install Vuelidate and its validators in our project:

   npm install @vuelidate/core @vuelidate/validators

2. Create a new Vue component for the registration form, and build the template with the form and its inputs:

   <template>
     <form @submit.prevent="submitForm">
       <div>
         <label for="email">Email:</label>
         <input id="email" type="email" v-model="email">
       </div>
       <div>
         <label for="password">Password:</label>
         <input id="password" type="password" v-model="password">
       </div>
       <button type="submit">Submit</button>
     </form>
   </template>

3. Inside the script section, add a data method to the export default object and return an object with the email and password properties:

   export default {
     data() {
       return {
         email: '',
         password: '',
       };
     },
   };

4. Add a methods section with the submitForm method. In a real-world application, this is where you would make an API call with the form data, but for our example, we will simply display an alert:

   methods: {
     submitForm() {
       alert('Form submitted');
     },
   },

Now, let’s add Vuelidate to validate our inputs:

5. Import Vuelidate and the required validators in your component:

   import { required, email } from '@vuelidate/validators';
   import { useVuelidate } from '@vuelidate/core';

6. Add the validations object to define validation rules for the form:

   validations: {
     email: { required, email },
     password: { required },
   },

7. Update the submitForm method to include validation:

   methods: {
     submitForm() {
       this.$v.$touch();
       if (this.$v.$invalid) {
         alert('Please correct the errors in the form.');
       } else {
         alert('Form submitted');
       }
     },
   },

8. Display validation error messages in the template:

   <span v-if="$v.email.$error">Invalid email address.</span>
   <span v-if="$v.password.$error">Password is required.</span>

<template>
  <form @submit.prevent="submitForm">
    <div>
      <label for="email">Email:</label>
      <input id="email" type="email" v-model="email">
      <span v-if="$v.email.$error">
        <span v-if="!$v.email.required">Email is required.</span>
        <span v-if="!$v.email.email">Invalid email address.</span>
      </span>
    </div>
    <div>
      <label for="password">Password:</label>
      <input id="password" type="password" v-model="password">
      <span v-if="$v.password.$error">
        <span v-if="!$v.password.required">Password is required.</span>
        <span v-if="!$v.password.minLength">Password must be at least 8 characters long.</span>
      </span>
    </div>
    <button type="submit">Submit</button>
  </form>
</template>

<style>
.invalid {
  border-color: red;
}
</style>

<template>
  <form @submit.prevent="submitForm">
    <div>
      <label for="email">Email:</label>
      <input id="email" type="email" v-model="email" :class="{ invalid: $v.email.$error }">
      <span v-if="$v.email.$error">
        <span v-if="!$v.email.required">Email is required.</span>
        <span v-if="!$v.email.email">Invalid email address.</span>
      </span>
    </div>
    <div>
      <label for="password">Password:</label>
      <input id="password" type="password" v-model="password" :class="{ invalid: $v.password.$error }">
      <span v-if="$v.password.$error">
        <span v-if="!$v.password.required">Password is required.</span>
        <span v-if="!$v.password.minLength">Password must be at least 8 characters long.</span>
      </span>
    </div>
    <button type="submit">Submit</button>
  </form>
</template>

Vue Validate

Introduction to Vue Validate

Vue Validate is another popular form validation library for Vue.js. It is template-based and comes with a wide variety of built-in rules, localization support, and extensibility options.

Vue Validate Documentation

Vue Validate GitHub Repository

Setting up Vue Validate in a Vue 3 project

1. Install Vue Validate using npm or yarn:

npm install vee-validate@next

or

yarn add vee-validate@next

2. Import the necessary components and rules into your Vue component:

   import { defineComponent, ref } from 'vue';
   import { Field, Form, required, email } from 'vee-validate';
   
   export default defineComponent({
     components: {
       Field,
       Form
     },
     setup() {
       const formData = {
         email: ref(''),
         password: ref('')
       };
   
       return {
         formData,
         required,
         email
       };
     }
   });

Using Vue Validate for form validation

In your template, use the Field, Form, and validation rules to create a form with validation:

<template>
  <Form @submit.prevent="submitForm">
    <div>
      <label for="email">Email:</label>
      <Field id="email" v-model="formData.email" :rules="required | email" name="email" type="email" />
      <p v-if="errors.email">{{ errors.email }}</p>
    </div>
    <div>
      <label for="password">Password:</label>
      <Field id="password" v-model="formData.password" :rules="required" name="password" type="password" />
      <p v-if="errors.password">{{ errors.password }}</p>
    </div>
    <button type="submit">Submit</button>
  </Form>
</template>

Common use cases and examples

Vue Validate offers a comprehensive set of built-in validation rules, as well as the ability to create custom rules. Some examples include:

• Required fields
• Email validation
• Minimum and maximum length
• Numeric values
• Regular expression pattern matching
• Custom validation functions

Comparison of Vuelidate and Vue Validate

Both Vuelidate and Vue Validate are powerful and versatile form validation libraries for Vue 3 applications. Your choice between the two will depend on your preferred approach to validation (model-based or template-based) and your specific project requirements.

Best Practices for Vue 3 Form Validation

In this section, we will discuss the best practices for form validation in Vue 3 applications. By following these guidelines, you can ensure that your form validation is well-organized, user-friendly, and efficient.

Organizing validation rules

1. Centralize your validation rules: Create a centralized file where you store all your validation rules. This makes it easier to maintain and reuse the rules across your application. For example, create a file called validationRules.js:

   export const required = (value) => !!value || 'This field is required.';
   export const email = (value) => /^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test(value) || 'Invalid email address.';
   // More rules ...

2. Group related rules: Group related validation rules together to improve readability and maintainability. For example, you can group all the rules related to user registration in one object:

   export const registrationRules = {
     username: [required],
     email: [required, email],
     password: [required, minLength(8)],
     // More rules ...
   };

3. Use descriptive rule names: Ensure that your rule names are descriptive and self-explanatory. This makes it easier to understand the purpose of each rule.

Error handling and user feedback

1. Display clear error messages: Display user-friendly and clear error messages that inform users about the nature of the error and how to correct it.
2. Show error messages near the relevant input fields: Present error messages close to the input fields that they correspond to. This helps users easily identify which field needs attention.
3. Provide real-time feedback: Use Vue’s reactivity to provide real-time feedback as users interact with the form. This allows users to correct their mistakes before submitting the form.
4. Highlight invalid fields: Apply styling to indicate which fields are invalid, making it easier for users to spot errors.

Accessibility considerations

1. Use appropriate HTML elements: Use appropriate HTML elements, such as <label>, <input>, and <button>, to ensure that your forms are accessible to users with disabilities.
2. Associate labels with input fields: Make sure to associate each label with its corresponding input field using the for attribute. This improves the usability of your forms for screen reader users.
3. Use ARIA attributes: Use ARIA attributes to provide additional context to users with disabilities, such as indicating required fields or providing error messages.

Performance optimization

1. Debounce validation: Debounce validation functions to prevent unnecessary computations and improve performance, especially when dealing with large forms or complex validation logic. You can use libraries like Lodash to implement debouncing.
2. Optimize custom validation functions: Ensure that your custom validation functions are efficient and avoid expensive computations.

Testing validation logic

1. Unit test your validation rules: Write unit tests for your validation rules to ensure that they work correctly and catch any errors before they reach production.
2. Integration test your forms: Perform integration tests on your forms to ensure that they work correctly in the context of your application. This includes testing how the form interacts with other components, services, and APIs.

Official Vue 3 documentation on form validation

To gain a deeper understanding of form validation in Vue 3, the official documentation is an invaluable resource:

1. Vue 3 Guide: Form Input Bindings
2. Vue 3 API: v-model
3. Vue 3 Composition API: ref and computed
4. Vue 3 Reactivity: Deep Dive
5. Vue 3 Guide: Handling Events

Vuelidate and Vue Validate GitHub repositories

For the latest updates and information on the two popular Vue 3 form validation libraries, visit their GitHub repositories:

1. Vuelidate GitHub Repository
2. Vuelidate Core
3. Vue Validate GitHub Repository