Svelte 4 vs Vue 2: A Comprehensive Comparison

This website is powered by ItGalaxy.io

In the world of frontend development, Svelte 4 and Vue 2 represent different approaches to building web applications. While Svelte 4 takes a revolutionary compiler-based approach, Vue 2 follows a more traditional virtual DOM-based architecture. Let’s explore their differences and use cases.

Table of Contents

  1. Core Concepts
  2. Reactivity and State Management
  3. Templating and Components
  4. Styling Approaches
  5. DOM Manipulation
  6. Component Composition
  7. Form Handling
  8. Lifecycle Management
  9. Performance and Bundle Size
  10. Learning Curve
  11. Conclusion

Core Concepts

Svelte 4 and Vue 2 take fundamentally different approaches to building web applications:

  • Svelte 4 is a compiler that creates vanilla JavaScript at build time, with no runtime library required
  • Vue 2 is a traditional framework with a runtime library and virtual DOM

Reactivity and State Management

State Declaration

Both frameworks offer different ways to declare and manage state:

Svelte 4’s Approach

<script>
  let name = "John";
</script>

<h1>Hello {name}</h1>

Svelte’s reactivity is built into the language itself. Variables are made reactive simply by assigning to them.

Vue 2’s Approach

<script>
export default {
  data() {
    return {
      name: "John",
    };
  },
};
</script>

<template>
  <h1>Hello {{ name }}</h1>
</template>

Vue 2 uses a more explicit data property to define reactive state.

Computed Values

Svelte 4’s Reactive Declarations

<script>
  let count = 10;
  $: doubleCount = count * 2;
</script>

<div>{doubleCount}</div>

Svelte uses the $: label to create reactive statements.

Vue 2’s Computed Properties

<script>
export default {
  data() {
    return {
      count: 10,
    };
  },
  computed: {
    doubleCount() {
      return this.count * 2;
    },
  },
};
</script>

<template>
  <div>{{ doubleCount }}</div>
</template>

Vue 2 uses computed properties for derived state.

Templating and Components

Basic Templating

Svelte 4

<h1>Hello world</h1>

Svelte components are single files with a .svelte extension.

Vue 2

<template>
  <h1>Hello world</h1>
</template>

Vue 2 requires a <template> wrapper for component markup.

DOM Manipulation

Conditional Rendering

Svelte 4

{#if light === "red"}
  <span>STOP</span>
{:else if light === "orange"}
  <span>SLOW DOWN</span>
{:else if light === "green"}
  <span>GO</span>
{/if}

Vue 2

<span v-if="light === 'red'">STOP</span>
<span v-else-if="light === 'orange'">SLOW DOWN</span>
<span v-else-if="light === 'green'">GO</span>

List Rendering

Svelte 4

<script>
  const colors = ["red", "green", "blue"];
</script>

<ul>
  {#each colors as color (color)}
    <li>{color}</li>
  {/each}
</ul>

Vue 2

<script>
export default {
  data() {
    return {
      colors: ["red", "green", "blue"],
    };
  },
};
</script>

<template>
  <ul>
    <li v-for="color in colors" :key="color">
      {{ color }}
    </li>
  </ul>
</template>

Component Composition

Props

Svelte 4

<!-- UserProfile.svelte -->
<script>
  export let name;
  export let age;
  export let favouriteColors;
  export let isAvailable;
</script>

<!-- Usage -->
<UserProfile
  name="John"
  age={20}
  favouriteColors={["green", "blue", "red"]}
  isAvailable
/>

Vue 2

<!-- UserProfile.vue -->
<script>
export default {
  props: {
    name: String,
    age: Number,
    favoriteColors: Array,
    isAvailable: Boolean,
  },
};
</script>

<!-- Usage -->
<UserProfile
  name="John"
  :age="20"
  :favorite-colors="['green', 'blue', 'red']"
  is-available
/>

Form Handling

Two-way Binding

Svelte 4

<script>
  let text = "Hello World";
</script>

<input bind:value={text} />
<p>{text}</p>

Vue 2

<script>
export default {
  data() {
    return {
      text: "Hello World",
    };
  },
};
</script>

<template>
  <div>
    <input v-model="text" />
    <p>{{ text }}</p>
  </div>
</template>

Lifecycle Management

Component Mounting

Svelte 4

<script>
  import { onMount } from "svelte";

  onMount(() => {
    console.log("Component mounted");
  });
</script>

Vue 2

<script>
export default {
  mounted() {
    console.log("Component mounted");
  },
};
</script>

Performance and Bundle Size

Svelte 4

  • Smaller bundle size (no runtime)
  • Compiles to vanilla JavaScript
  • Better initial load performance
  • No virtual DOM overhead

Vue 2

  • Larger bundle size (includes runtime)
  • Uses virtual DOM
  • Mature optimization techniques
  • Well-established performance patterns

Learning Curve

Svelte 4

  • Gentle learning curve
  • Familiar JavaScript syntax
  • Less framework-specific concepts
  • Minimal boilerplate

Vue 2

  • Moderate learning curve
  • More framework-specific concepts
  • Options API to learn
  • More structured approach

Conclusion

Choose Svelte 4 if you:

  • Want smaller bundle sizes
  • Prefer writing less boilerplate
  • Need better runtime performance
  • Want a more straightforward learning curve
  • Are building smaller to medium-sized applications

Choose Vue 2 if you:

  • Need a battle-tested framework
  • Want a larger ecosystem
  • Prefer more structured component architecture
  • Need extensive community support
  • Are building large-scale applications

Both frameworks have their strengths:

  • Svelte 4 excels in performance and developer experience with its compile-time approach
  • Vue 2 offers a mature ecosystem and proven architecture for large applications

The choice between Svelte 4 and Vue 2 often depends on your project’s specific needs, team expertise, and scalability requirements. Svelte 4 is perfect for modern, performance-focused applications, while Vue 2 remains a solid choice for enterprise-level applications with its mature ecosystem and established patterns.





Decouvrez plus d’Offres de la plateform ItGalaxy.io :

Découvrez notre gamme complète de services et formations pour accélérer votre carrière.

1. Nous contactez

  • Description: Besoin de Formation et des Solutions cloud complètes pour vos applications
  • Links:

2. Infra as a Service

  • Description: Infrastructure cloud évolutive et sécurisée
  • Links:

3. Projets Développeurs

4. Développeurs

5. Formations Complètes

6. Marketplace

7. Blogs

This website is powered by ItGalaxy.io