Building Modern Web Applications with Vue 3

Vue 3 has revolutionized how we build web applications with its Composition API, improved performance, and better TypeScript support. In this post, we'll explore the key features that make Vue 3 a powerful choice for modern development.

The Composition API Revolution

The Composition API is Vue 3's most significant addition, offering better logic reuse and TypeScript integration:

<script setup lang="ts">
import { ref, computed, onMounted } from 'vue'

// Reactive state
const count = ref(0)
const doubled = computed(() => count.value * 2)

// Lifecycle hooks
onMounted(() => {
  console.log('Component mounted!')
})

// Methods
const increment = () => {
  count.value++
}
</script>

<template>
  <div>
    <p>Count: {{ count }}</p>
    <p>Doubled: {{ doubled }}</p>
    <button @click="increment">Increment</button>
  </div>
</template>

Key Benefits

1. Better Logic Organization

The Composition API allows you to group related logic together, making your code more maintainable.

2. Improved TypeScript Support

Vue 3 was built with TypeScript in mind, providing excellent type inference and safety.

3. Enhanced Performance

• Smaller bundle sizes
• Faster rendering
• Better tree-shaking

Best Practices

When working with Vue 3, consider these best practices:

1. Use <script setup> for cleaner component syntax
2. Leverage composables for logic reuse
3. Embrace TypeScript for better developer experience
4. Optimize with v-memo for expensive operations

Composables Example

Here's a simple composable for managing local storage:

import { ref, watch } from 'vue'

export function useLocalStorage(key: string, defaultValue: any) {
  const storedValue = localStorage.getItem(key)
  const value = ref(storedValue ? JSON.parse(storedValue) : defaultValue)

  watch(value, (newValue) => {
    localStorage.setItem(key, JSON.stringify(newValue))
  }, { deep: true })

  return value
}

Conclusion

Vue 3 represents a significant leap forward in frontend development. Its combination of developer experience, performance, and flexibility makes it an excellent choice for projects of any size.

What's your experience with Vue 3? Let me know in the comments!