Mastering Vue 3’s Template Syntax: A Step-by-Step Tutorial

Setting up a Vue 3 project:

Make sure you have Node.js installed on your machine.

Install the Vue CLI globally by running the following command in your terminal:

npm install -g @vue/cli

Create a new Vue project using the Vue CLI:

vue create my-project

Follow the prompts to select the features and configurations for your project.

Once the project is created, navigate to the project directory:

cd my-project

Start the development server:

npm run serve

You should now have a basic Vue 3 project up and running.

Understanding the Vue component structure:

In Vue, you build your application using components. A Vue component consists of three parts: template, script, and style.The template is where you define the HTML structure of your component.The script contains the JavaScript code for the component.The style section is used for component-specific CSS.

Working with template syntax:

Open the src/components/HelloWorld.vue file in your project. You will see an existing template in the file. Vue 3 uses a double curly brace {{ }} syntax for data interpolation. You can use this syntax to display data in your template.

Replace the existing template code with the following:

<template>
  <div>
    <h1>{{ message }}</h1>
    <button @click="changeMessage">Change Message</button>
  </div>
</template>

In the above code, we have a heading tag (<h1>) that displays the value of the message data property. We also have a button that triggers the changeMessage method when clicked. Save the file.

Updating the script section:

Below the template section, you will find the script section. Modify the script section as follows:

<script>
export default {
  data() {
    return {
      message: "Hello, Vue 3!",
    };
  },
  methods: {
    changeMessage() {
      this.message = "Changed message!";
    },
  },
};
</script>

In the data function, we define a message property with an initial value of “Hello, Vue 3!”. The changeMessage method updates the value of the message property when the button is clicked.

Testing the component:

Save the changes and go to your browser. Open the URL shown in your terminal when you started the development server. You should see the message “Hello, Vue 3!” displayed along with a button. Clicking the button should update the message to “Changed message!”.

That’s it! You have successfully used template syntax in Vue 3. You can now build more complex templates and components using Vue 3’s template syntax and take advantage of its reactive data system, computed properties, and more.

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