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Compare Declarative Frameworks

Choose up-to 3 frameworks and learn how they compare to each other.
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Creating a new Component
Components are the reusable building blocks of your application. They are the most basic UI elements and can be used to build more complex components.
Vue.js
javascript
<template>
  <div>{{ displayString }}</div>
</template>

<script setup>
import { defineProps } from 'vue';

const props = defineProps({
  displayString: String
});
</script>
Flutter
dart
class MyComponent extends StatelessWidget {
  final String displayString;

  MyComponent({required this.displayString});

  @override
  Widget build(BuildContext context) {
    return Text(displayString);
  }
}
Conditional Rendering
Conditional rendering is a technique used to display different UI components or content based on certain conditions, such as the value of a variable or the outcome of a boolean expression.
Vue.js
javascript
<template>
  <p v-if="condition">Condition is true</p>
  <p v-else>Condition is false</p>
</template>

<script setup>
import { defineProps } from 'vue';

const props = defineProps({
  condition: Boolean
});
</script>
Flutter
dart
class ConditionalComponent extends StatelessWidget {
  final bool condition;

  ConditionalComponent({required this.condition});

  @override
  Widget build(BuildContext context) {
    if(condition) {
      return Text("Condition is true");
    } else {
      return Text("Condition is false");
    }
  }
}

// Usage
ConditionalComponent(condition: true)
Prop/Parameter Drilling
Prop/Parameter drilling is a technique where data is passed through multiple layers of components in the component hierarchy, often from a parent component to a deeply nested child component, via props or parameters.
Vue.js
javascript
<template>
  <intermediate-component :data="data" />
</template>

<script setup>
import { defineProps } from 'vue';
import IntermediateComponent from './IntermediateComponent.vue';

const props = defineProps({
  data: String
});
</script>
Flutter
dart
class Parent extends StatelessWidget {
  final String data;

  Parent({required this.data});

  @override
  Widget build(BuildContext context) {
    return IntermediateComponent(data: data);
  }
}

class IntermediateComponent extends StatelessWidget {
  final String data;

  IntermediateComponent({required this.data});

  @override
  Widget build(BuildContext context) {
    return ChildComponent(data: data);
  }
}

class ChildComponent extends StatelessWidget {
  final String data;

  ChildComponent({required this.data});

  @override
  Widget build(BuildContext context) {
    return Text("Received data: $data");
  }
}

// Usage
Parent(data: "Some data")
Responding to events
Responding to events involves handling user interactions, such as button clicks or text input changes, and updating the component's state or triggering side effects accordingly.
Vue.js
javascript
<template>
  <button @click="setClicked">
    {{ clicked ? "Button clicked" : "Click me" }}
  </button>
</template>

<script setup>
import { ref } from 'vue';

const clicked = ref(false);

function setClicked() {
  clicked.value = true;
}
</script>
Flutter
dart
class ClickableComponent extends StatefulWidget {
  @override
  _ClickableComponentState createState() => _ClickableComponentState();
}

class _ClickableComponentState extends State<ClickableComponent> {
  bool clicked = false;

  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: () => setState(() => clicked = true),
      child: Text(clicked ? "Button clicked" : "Click me"),
    );
  }
}
Handing user input
Handling user input involves capturing and processing user interactions with input fields, such as text fields, sliders, or checkboxes, and updating the component's state or triggering side effects based on the input.
Vue.js
javascript
<template>
  <input
    type="text"
    v-model="text"
    placeholder="Enter text"
  />
</template>

<script setup>
import { ref } from 'vue';

const text = ref('');
</script>
Flutter
dart
class TextInputComponent extends StatefulWidget {
  const TextInputComponent({super.key});

  @override
  State<TextInputComponent> createState() => _TextInputComponentState();
}

class _TextInputComponentState extends State<TextInputComponent> {
  late final _controller = TextEditingController(text: "");

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return TextField(
      controller: _controller,
      decoration: const InputDecoration(labelText: "Enter text"),
    );
  }
}
Previewing a Component
Creating a preview of a component involves displaying a visual representation of the component in the development environment to help with the design and layout process.
Vue.js

Vue.js doesn't have a built-in preview feature. However, you can use a tool like Storybook to create previews for your components in a separate development environment.

Flutter

Flutter doesn't have a built-in preview feature. You can, however, create a separate app or run your app in an emulator or on a device to view your components. Additionally, you can use the Flutter Studio web-based tool to create and preview Flutter widgets in a browser.

Lists & Looping
Lists and looping involve rendering a dynamic number of components based on the length of a list or array, iterating over the list, and generating a UI component for each item.
Vue.js
javascript
<template>
  <ul>
    <li v-for="item in items" :key="item">
      {{ item }}
    </li>
  </ul>
</template>

<script setup>
import { defineProps } from 'vue';

const props = defineProps({
  items: Array
});
</script>

<!-- Usage -->
<list-component :items="['Item 1', 'Item 2', 'Item 3']"></list-component>
Flutter
dart
class ListComponent extends StatelessWidget {
  final List<String> items;

  ListComponent({required this.items});

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: items.length,
      itemBuilder: (context, index) {
        return ListTile(title: Text(items[index]));
      },
    );
  }
}

// Usage
final items = ["Item 1", "Item 2", "Item 3"];
ListComponent(items: items)
List item keys
List Item Keys are unique identifiers assigned to each list item in declarative UI frameworks to help manage and update list elements efficiently. Using List Item Keys enables the framework to optimize the rendering process, minimizing unnecessary updates and improving overall performance.
Vue.js
javascript
<template>
  <ul>
    <li v-for="person in items" :key="person.id">
      Name: {{ person.name }}, Age: {{ person.age }}
    </li>
  </ul>
</template>

<script setup>
import { defineProps } from 'vue';

const props = defineProps({
  items: Array
});
</script>

<!-- Usage -->
<item-keys-example
  :items="[
    { name: 'John', age: 30, id: '1' },
    { name: 'Jane', age: 28, id: '2' },
    { name: 'Bob', age: 25, id: '3' }
  ]"
></item-keys-example>
Flutter
dart
class Person {
  final String name;
  final int age;
  final String id;

  Person({required this.name, required this.age, required this.id});
}

class ItemKeysExample extends StatelessWidget {
  final List<Person> items;

  ItemKeysExample({required this.items});

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: items.length,
      itemBuilder: (context, index) {
        final person = items[index];
        return ListTile(
          key: Key(person.id),
          title: Text('Name: ${person.name}, Age: ${person.age}'),
        );
      },
    );
  }
}

// Usage
ItemKeysExample(items: [Person(name: 'John', age: 30, id: '1'), Person(name: 'Jane', age: 28, id: '2'), Person(name: 'Bob', age: 25, id: '3')])
Slot APIs
Slot APIs refer to a technique where components have customizable parts or 'slots' that can be filled with content when the component is being used. This allows for greater reusability and flexibility in composing user interfaces. The content that fills these slots can be other components or simple UI elements like text or images.
Vue.js
javascript
// ParentComponent.vue
<template>
  <div>
    <slot name="header"></slot>
    <slot name="content"></slot>
  </div>
</template>

// ChildComponent.vue
<template>
  <p>Child Content</p>
</template>

// Usage
<parent-component>
  <template v-slot:header>
    <h1>Header</h1>
  </template>
  <template v-slot:content>
    <child />
  </template>
</parent-component>
Flutter
dart
class Parent extends StatelessWidget {
  final Widget header;
  final Widget content;

  Parent({required this.header, required this.content});

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        header,
        content,
      ],
    );
  }
}

// Usage
Parent(
  header: Text("Header"),
  content: Child(),
)

class Child extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Text("Child Content");
  }
}
Modifiers
Modifiers are used to adjust or configure the UI elements' appearance or behavior in a declarative UI framework.
Vue.js

Vue.js doesn't have a direct analog to modifiers in Jetpack Compose or SwiftUI. Instead, you can use inline styles or CSS classes.

javascript
<template>
  <div :style="style">Hello, World!</div>
</template>

<script setup>
import { reactive } from 'vue';

const style = reactive({
  padding: '16px',
  backgroundColor: 'blue',
  color: 'white'
});
</script>
Flutter

In Flutter, you can wrap widgets with other widgets to achieve similar effects.

dart
class ModifiersExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.all(16.0),
      color: Colors.blue,
      child: Text('Hello, World!', style: TextStyle(color: Colors.white)),
    );
  }
}
State
State management refers to the process of handling and updating the internal state of components, often in response to user interactions or other events.
Vue.js
javascript
<template>
  <button @click="incrementCount">
    Count: {{ count }}
  </button>
</template>

<script setup>
import { ref } from 'vue';

const count = ref(0);

function incrementCount() {
  count.value++;
}
</script>
Flutter
dart
class Counter extends StatefulWidget {
  @override
  _CounterState createState() => _CounterState();
}

class _CounterState extends State<Counter> {
  int count = 0;

  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: () => setState(() => count += 1),
      child: Text("Count: $count"),
    );
  }
}
Scoped Data Propagation
Scoped Data Propagation is a technique that involves passing data across multiple levels of a component subtree without having to explicitly pass it through every intermediate component. It helps reduce the complexity of prop drilling and allows for a more efficient way of sharing data in a specific scope.
Vue.js
javascript
<!-- ParentComponent.vue -->
<template>
  <intermediate />
</template>

<script setup>
import { provide, ref } from 'vue';
import Intermediate from './IntermediateComponent.vue';

const data = ref('Some data');
provide('dataKey', data);
</script>

<!-- IntermediateComponent.vue -->
<template>
  <child />
</template>

<script setup>
import Child from './ChildComponent.vue';
</script>

<!-- ChildComponent.vue -->
<template>
  <p>Received data: {{ data }}</p>
</template>

<script setup>
import { inject } from 'vue';

const data = inject('dataKey');
</script>


<!-- Usage -->
<parent-component data="Some data"></parent-component>
Flutter
dart
class CustomInheritedWidget extends InheritedWidget {
  final String data;

  CustomInheritedWidget({required this.data, required Widget child})
      : super(child: child);

  @override
  bool updateShouldNotify(CustomInheritedWidget oldWidget) {
    return oldWidget.data != data;
  }

  static CustomInheritedWidget of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<CustomInheritedWidget>()!;
  }
}

class Parent extends StatelessWidget {
  final String data;

  Parent({required this.data});

  @override
  Widget build(BuildContext context) {
    return CustomInheritedWidget(
      data: data,
      child: Intermediate(),
    );
  }
}

class Intermediate extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Child();
  }
}

class Child extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final data = CustomInheritedWidget.of(context).data;
    return Text("Received data: $data");
  }
}

// Usage
Parent(data: "Some data")
Side Effects
A side effect involves executing code that can have external consequences or perform operations that are not directly related to rendering the UI, such as making network requests or updating external data sources.
Vue.js
javascript
<template>
  <div></div>
</template>

<script setup>
import { onMounted } from 'vue';

onMounted(() => {
  // Perform side effect here
});
</script>
Flutter
dart
class SideEffectOnLoadComponent extends StatefulWidget {
  @override
  _SideEffectOnLoadComponentState createState() => _SideEffectOnLoadComponentState();
}

class _SideEffectOnLoadComponentState extends State<SideEffectOnLoadComponent> {
  @override
  void initState() {
    super.initState();
    // Perform side effect, e.g. fetch data, update external data source
  }

  @override
  Widget build(BuildContext context) {
    // Other UI components
    return Container();
  }
}

Frequently Asked Questions About Vue.js vs Flutter

Which is better for beginners, Vue.js or Flutter?

Let's analyze the learning curve and requirements for each framework in 2025:

Vue.js (5/5)

Vue.js is highly beginner-friendly with its progressive learning curve and clear documentation. Its template syntax feels natural to HTML developers, while the Composition API offers a powerful way to organize complex logic. The framework provides official solutions for common needs, reducing decision fatigue.

Learning Path:
  1. Learn Vue template syntax and directives
  2. Understand component system
  3. Master Composition API
  4. Learn Vue Router and state management
  5. Practice Vue best practices and patterns
Key Prerequisites:
  • HTML/CSS
  • JavaScript basics
  • npm/yarn

Time to Productivity: 1-2 months for web developers, 2-3 months for beginners

Flutter (3/5)

Flutter requires learning Dart, which may be unfamiliar to many developers. However, its comprehensive documentation, hot reload feature, and widget-based architecture make the learning process systematic. The consistent behavior across platforms reduces platform-specific complexity.

Learning Path:
  1. Learn Dart programming language
  2. Understand Flutter widget system
  3. Master state management approaches
  4. Learn platform integration techniques
  5. Practice responsive design patterns
Key Prerequisites:
  • Dart
  • Basic programming concepts
  • Mobile UI principles

Time to Productivity: 3-4 months for mobile developers, 4-6 months for beginners

Recommendation

Based on the analysis, Vue.js offers the most approachable learning curve. However, your choice should depend on:

  • Your existing programming background (HTML/CSS, Dart)
  • Target platform requirements (Cross-platform, Cross-platform)
  • Available learning time (1-2 months for web developers, 2-3 months for beginners for Vue.js)
  • Long-term career goals in mobile/web development

How does the performance of Vue.js compare to Flutter in real-world applications?

Let's analyze the real-world performance characteristics of Vue.js and Flutter based on benchmarks and practical experience:

Vue.js Performance Profile

Strengths
  • ✓ Reactive system

    Fine-grained reactivity system that updates only affected components.

  • ✓ Virtual DOM efficiency

    Optimized virtual DOM implementation with static tree hoisting.

  • ✓ Template compilation

    Templates are compiled into highly optimized render functions.

Areas for Optimization
  • ! Complex reactivity overhead

    Deep reactive objects can have performance implications.

  • ! Mobile optimization

    May require additional optimization for mobile web performance.

Flutter Performance Profile

Strengths
  • ✓ Custom rendering engine

    Skia rendering engine provides consistent performance across platforms without relying on native components.

  • ✓ Widget tree optimization

    Efficient widget rebuilding system that minimizes the impact of UI updates.

  • ✓ JIT/AOT compilation

    Supports both Just-in-Time compilation for development and Ahead-of-Time compilation for release builds.

Areas for Optimization
  • ! Initial app size

    Larger app size due to bundled runtime and engine components.

  • ! Complex screen jank

    Can experience frame drops on screens with complex animations or heavy computation.

Performance Optimization Tips

Vue.js
  • Use v-show for frequently toggled content
  • Implement proper key usage in v-for directives
  • Leverage Vue's keep-alive component
  • Profile with Vue DevTools and Chrome Performance
Flutter
  • Use const constructors for static widgets
  • Implement proper keys in lists for efficient updates
  • Leverage Flutter's built-in performance overlay
  • Profile with DevTools to identify performance bottlenecks

What are the key architectural differences between Vue.js and Flutter?

Here are the key differences between Vue.js and Flutter:

Feature Vue.jsFlutter
Paradigm Progressive JavaScript framework with a template-based approachDeclarative UI toolkit with a widget-based approach
Target Platform Web primarilyCross-platform (iOS, Android, web, desktop)
Language JavaScript/TypeScriptDart
Component Model Single-file components with template, script, and style sectionsWidget classes (stateless and stateful)
State Management Reactive data with Composition API or Options APIStatefulWidget with setState, or state management packages
Ecosystem Growing ecosystem with official libraries for routing and stateGoogle-backed with a growing ecosystem of packages

The choice between these frameworks often depends on your target platform, existing expertise, and specific project requirements. Vue.js and Flutter each have their strengths in different contexts.

What are the job market trends for Vue.js vs Flutter in 2025?

If you're considering a career move in 2025, here's how these frameworks compare in terms of job prospects:

Vue.js

  • Current Demand: Solid demand, particularly in certain markets like Asia
  • Growth Trajectory: Steady growth with strong community support
  • Notable Companies: Alibaba, GitLab, Grammarly, Nintendo

Flutter

  • Current Demand: High demand for cross-platform development skills
  • Growth Trajectory: One of the fastest-growing mobile frameworks
  • Notable Companies: Google, Alibaba, BMW, eBay

Can Vue.js and Flutter be used together in the same project?

Understanding how Vue.js and Flutter can work together:

Vue.js + Flutter

Vue.js is for web while Flutter is for mobile/desktop apps. They can be used together as part of a larger product ecosystem but not within the same application.

Web + Mobile Strategy: A common approach is to use Vue.js for your web application, while using Flutter for mobile apps. You can share business logic and API calls between them, but the UI layer would be implemented separately for each platform.

Why does Flutter use Dart instead of a more common language?

Flutter's choice of Dart as its programming language offers several technical advantages:

  • Just-in-Time (JIT) compilation during development enables hot reload, allowing for quick iteration
  • Ahead-of-Time (AOT) compilation for releases creates high-performance native code
  • Non-blocking asynchronous programming through async/await and Future objects
  • Sound null safety helps eliminate null reference errors
  • Fast garbage collection optimized for UI construction patterns
  • Object-oriented with mixins for reusable code

While languages like JavaScript or Kotlin might have larger communities, Dart was specifically optimized for Flutter's needs in building reactive UIs and achieving native performance. Google has invested heavily in making Dart an excellent language for UI development.

Despite being less common, Dart is easy to learn for developers familiar with Java, JavaScript, or C#, with most developers becoming productive within a few weeks.

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