1. Introduction

In this tutorial, we'll be exploring how to create dynamic templates in Vue.js. The goal is to understand how Vue.js templates work, how they can be used to display data, and how to handle complex expressions within them.

By the end of this tutorial, you will:

• Understand Vue.js template syntax
• Learn how to bind data to the DOM
• Understand how to handle complex expressions in templates

Prerequisites

This tutorial assumes you have a basic understanding of HTML, CSS, and JavaScript. Knowledge of Vue.js will be beneficial but is not mandatory as we'll be covering everything from scratch.

2. Step-by-Step Guide

Vue.js templates are written in HTML. However, they can also include Vue-specific attributes and expressions. The Vue instance data can be bound into the DOM using the v-bind directive.

Let's dive into the steps:

2.1 Creating a Vue Instance

A Vue instance is created by using the Vue function:

let app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!'
  }
});

2.2 Creating a Vue Template

In the HTML file, we create a Vue template by adding an element with an id that matches the el property of our Vue instance:

<div id="app">
  {{ message }}
</div>

2.3 Binding to the DOM

To bind the Vue instance data to the DOM, we use the v-bind directive. For example, to bind the title attribute of an HTML element to a Vue instance's data property, we would do:

<div id="app">
  <span v-bind:title="message">
    Hover your mouse over me for a few seconds to see my dynamically bound title!
  </span>
</div>

3. Code Examples

Let's look at a more complex example of a Vue template:

3.1 Template with a Conditional

<div id="app">
  <p v-if="seen">Now you see me</p>
</div>

let app = new Vue({
  el: '#app',
  data: {
    seen: true
  }
});

In the above code, the paragraph will only be rendered if the value of seen is true.

3.2 Template with a Loop

<div id="app">
  <ol>
    <li v-for="item in items">
      {{ item.text }}
    </li>
  </ol>
</div>

let app = new Vue({
  el: '#app',
  data: {
    items: [
      { text: 'Learn JavaScript' },
      { text: 'Learn Vue' },
      { text: 'Build something awesome' }
    ]
  }
});

In this example, the list will dynamically generate list items based on the items array in the Vue instance.

4. Summary

We've covered the basics of Vue.js templates, including how to bind data to the DOM and handle complex expressions. The next steps would be to learn about Vue.js components, which allow you to encapsulate reusable parts of your templates.

For more information, refer to the Vue.js Guide and the Vue.js API documentation.

5. Practice Exercises

To put what we've learned into practice, let's work through a few exercises:

1. Create a Vue instance with a data property called name and display it in a Vue template.

2. Create a Vue template with a button that increments a counter. The counter should be a data property in your Vue instance.

3. Create a Vue template with a list of names. The names should be an array in your Vue instance data. Also, add an input field and a button that adds a new name to the list when the button is clicked.

Solutions and explanations can be found on the Vue.js official website. Keep practicing and exploring more about Vue.js.