Crash Course on Vue 3: Building a Project From Scratch

Vue 3 Crash Course | Project From Scratch

Vue.js is a popular JavaScript framework used for building user interfaces. It provides developers with a simple yet powerful way to create dynamic web applications. With the release of Vue 3, many new features and improvements have been introduced, making it even more attractive to developers. In this crash course, we will walk you through the process of creating a project from scratch using Vue 3.

To get started, make sure you have Node.js installed on your computer. You can verify this by running the command `node -v` in your terminal. If Node.js is not installed, you can download it from the official website or use a package manager like npm.

First, let’s install the Vue CLI. The Vue CLI is a command-line tool that helps with initializing new projects and managing dependencies. Open your terminal and run the following command:

“`
npm install -g @vue/cli
“`

Once the installation is complete, you can create a new Vue project by running the following command:

“`
vue create vue-crash-course
“`

This will prompt you to choose a preset for your project. For this crash course, we will use the default preset, which includes the basic features needed to get started. After selecting the preset, the Vue CLI will install the necessary dependencies and set up your project.

Once the project is created, navigate to the project directory by running the command `cd vue-crash-course`.

Now it’s time to start the development server. Run the following command to start the server:

“`
npm run serve
“`

This will start the development server and provide a local URL where you can view your application. Open your browser and type in the URL shown in your terminal. You should see a default Vue app with the Vue logo and some example content.

Now let’s dive into the code. Open your favorite code editor and navigate to the `src/components` directory. In this directory, you will find a file called `HelloWorld.vue`. This is the default component that is rendered on the home page.

Let’s modify this component to display a simple greeting. Replace the existing content in `HelloWorld.vue` with the following code:

“`html

“`

Save the file and go back to your browser. Notice that the greeting has changed to “Hello Vue 3!”. This demonstrates the basic two-way data binding feature of Vue 3.

In addition to two-way data binding, Vue 3 introduces several new features, such as the Composition API, a more flexible and powerful way to write reusable and maintainable code. The Composition API allows you to organize your code into reusable functions called “composition functions” that can be easily composed and reused across multiple components.

To demonstrate the Composition API, let’s create a new component called `Counter.vue`. Create a new file in the `src/components` directory called `Counter.vue` and add the following code:

“`html

“`

Save the file and go to the `App.vue` file. Replace the existing content with the following code:

“`html

“`

Save the file and go back to your browser. You should now see a new component called `Counter` below the greeting. The `Counter` component displays a count and two buttons for incrementing and decrementing the count. Clicking the buttons will update the count in real-time, thanks to Vue’s reactivity system.

This crash course only scratches the surface of what Vue 3 has to offer. Vue 3 brings many improvements and new features, including a faster and smaller runtime, improved reactivity system, and enhanced TypeScript support. If you’re interested in learning more, be sure to check out the official Vue 3 documentation and explore the vast Vue ecosystem. Happy coding!