**Course Title:** Mastering Vue.js: Building Modern Web Applications **Section Title:** Vue Directives and Event Handling **Topic:** Create an interactive form that uses directives, event handling, and computed properties to manage user input.(Lab topic) **Overview** In this lab, we'll create an interactive form that demonstrates how to leverage Vue's directives, event handling, and computed properties to manage user input. By the end of this lab, you'll have a solid understanding of how to build robust and reactive forms in Vue. **Step 1: Create a New Vue Project** To get started, create a new Vue project using the Vue CLI by running the following command in your terminal: ```bash vue create vue-interactive-form ``` Follow the prompts to set up your project. Once the project is created, navigate into the project directory and start the development server: ```bash cd vue-interactive-form npm run serve ``` **Step 2: Create a Form Component** Create a new file called `Form.vue` in the `src/components` directory. This component will render the interactive form. In the `template` section, add the following code: ```html <template> <div> <h2>Interactive Form</h2> <form @submit.prevent="handleSubmit"> <div> <label for="name">Name:</label> <input type="text" id="name" v-model.trim="name" /> </div> <div> <label for="email">Email:</label> <input type="email" id="email" v-model.trim="email" /> </div> <div> <label for="password">Password:</label> <input type="password" id="password" v-model.trim="password" /> </div> <button type="submit">Submit</button> </form> <div> <p>Name: {{ name }}</p> <p>Email: {{ email }}</p> <p>Password: {{ password }}</p> </div> </div> </template> ``` **Step 3: Use Directives to Manage User Input** In the above code, we used the `v-model` directive to create a two-way data binding between the form inputs and the component's data properties. This allows us to easily access and manipulate the user input. We also used the `@submit.prevent` directive to prevent the default form submission behavior and instead, call the `handleSubmit` method when the form is submitted. **Step 4: Handle Form Submission** In the `script` section, add the following code: ```javascript <script> export default { data() { return { name: '', email: '', password: '' } }, methods: { handleSubmit() { console.log('Form submitted:', this.name, this.email, this.password); } } } </script> ``` **Step 5: Use Computed Properties** Let's say we want to calculate the length of the password input. We can use a computed property to do this. Add the following code: ```javascript computed: { passwordLength() { return this.password.length; } } ``` Now, we can use the `passwordLength` computed property in our template: ```html <p>Password length: {{ passwordLength }}</p> ``` **Conclusion** In this lab, we created an interactive form that uses Vue's directives, event handling, and computed properties to manage user input. We learned how to use the `v-model` directive to create a two-way data binding, the `@submit.prevent` directive to prevent default form submission behavior, and computed properties to calculate the length of the password input. **Takeaways** * Use `v-model` to create a two-way data binding between form inputs and component data properties. * Use `@submit.prevent` to prevent default form submission behavior. * Use computed properties to calculate values based on other data properties. **What's Next** In the next topic, we'll introduce Vue Router and its core concepts. You'll learn how to create client-side routed applications with Vue. **Still need help?** If you have any questions or need further clarification on any of the concepts covered in this lab, please feel free to leave a comment. **Additional Resources** For more information on Vue's directives, event handling, and computed properties, check out the following resources: * [Vue.js Official Documentation: Forms](https://vuejs.org/v2/guide/forms.html) * [Vue.js Official Documentation: Event Handling](https://vuejs.org/v2/guide/events.html) * [Vue.js Official Documentation: Computed Properties](https://vuejs.org/v2/guide/computed.html)