Mastering Vue 3: A Comprehensive Guide to Building Modern Web Applications <Part 5 />
Tags: webdev, programming, vue, javascript
Published: 2024-02-02 08:42:36

**<u>Content:</u>**
1. [Mastering Vue 3 - Part 1 [Introduction and key features]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-part-1--c75)

[2. Mastering Vue 3 - Part 2 [Benefits of using Vue 3 for web development]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-part-2--1k0l)

[3. Mastering Vue 3 - Part 3 [Template syntax in Vue 3]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-part-3--fde)

[4. Mastering Vue 3 - Part 4 [Reactivity Fundamentals]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-19c0)

**5. Mastering Vue 3 - Part 5 [Class and Style Bindings]**

[6. Mastering Vue 3 - Part 6 [Lifecycle Hooks]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-1c6e)

[7. Mastering Vue 3 - Part 7 [Understanding components in Vue 3
]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-3nnd)

[8. Mastering Vue 3 - Part 8 [Installing Vue project and file structure]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-17ge)

[9. Mastering Vue 3 - Part 9 [Vue Router in Vue 3]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-5d1p)

[10. Mastering Vue 3 - Part 10 [Animation in Vue 3]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-4ig2)

[11. Mastering Vue 3 - Part 11 [State Management with Pinia]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-53gh)

[12. Mastering Vue 3 - Part 12 [Teleport in Vue 3]]
(https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-5h64)

[13. Mastering Vue 3 - Part 13 [Working with API Calls ]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-5h64)

[14. Mastering Vue 3 - Part 14 [Forms and Form Validation ]](https://dev.to/hanytaha61/mastering-vue-3-a-comprehensive-guide-to-building-modern-web-applications-4bhi)

---
## Class and Style Bindings

In Vue 3, class and style bindings allow you to dynamically apply CSS classes and inline styles to elements based on data or component state. This helps you create dynamic and responsive UIs by conditionally applying styles.

**<u>Class Bindings</u>**
Class bindings allow you to conditionally apply CSS classes to elements. You can use the `v-bind:class` directive or the shorthand `:class` to bind a class dynamically.

```vue
<template>
  <div>
    <p :class="{ 'red': isError, 'bold': isBold }">Some text</p>
  </div>
</template>
```
In this example, the `isError` and `isBold` variables determine whether the `red` and `bold` classes should be applied to the `<p>` element, respectively. If `isError` is `true`, the `red` class will be applied. If `isBold` is `true`, the `bold` class will be applied.

You can also use an object syntax to conditionally apply classes based on the truthiness of properties:

```vue
<template>
  <div>
    <p :class="classObject">Some text</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      classObject: {
        'red': true,
        'bold': false
      }
    };
  }
};
</script>
```
In this example, the `classObject` data property defines the classes to be applied. The `red` class is applied because its value is `true`, while the `bold` class is not applied because its value is `false`.

**<u>Style Bindings</u>**
Style bindings allow you to apply inline styles to elements dynamically. You can use the `v-bind:style` directive or the shorthand `:style` to bind styles.

```vue
<template>
  <div>
    <p :style="{ color: textColor, fontSize: fontSize + 'px' }">Some text</p>
  </div>
</template>
```
In this example, the `textColor` and `fontSize` variables determine the color and font size of the text, respectively. The `color` style is bound to the `textColor` variable, and the `fontSize` style is bound to the `fontSize` variable.

You can also bind styles directly to a style object in your component’s data:

```vue
<template>
  <div>
    <p :style="textStyle">Some text</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      textStyle: {
        color: 'red',
        fontSize: '20px'
      }
    }
  }
}
</script>
```
In this example, the `textStyle` data property defines the styles to be applied. The text will be displayed in red with a font size of 20 pixels.

Both class and style bindings can be combined and used together within the template.

These class and style bindings in Vue 3 provide a flexible way to apply dynamic styles and classes based on component data or state, allowing you to create more interactive and responsive user interfaces.