Choosing Between ReactJS and VueJS: A Developer's Guide.
Tags: webdev, beginners, javascript, interview
Published: 2023-03-02 21:37:58

Hello there, Developer. I hope everything is well with you. Have you ever wondered why some developers prefer VueJs over ReactJS? Have you ever been unsure which of the two to choose while on your development journey? Are you a beginner who is unsure about where to begin learning or where to specialize? Don't be concerned. In this tutorial, I'll walk you through everything you need to know to get started. I will compare the two in a clear and precise manner, listing and explaining the similarities and differences between the two. Let's get this party started.

---


## 1.0 <u>Brief introduction to ReactJS and VueJS.</u>
### 1.1 <u>ReactJS</u>
[React](https://reactjs.org/) is an open source JavaScript library that is used to create user interfaces in Web development.
It was released by Facebook in the year 2013.
It is a component-based library that is used to create the view layer of web pages. 
React functions by generating reusable components that represent various aspects of a user interface. Each component is responsible for rendering its own part of the UI, and React handles updating the UI efficiently as the application's data and state change over time. React also offers a simple and efficient way to manage an application's state, enabling developers to create dynamic and interactive user interfaces.

React is frequently used in conjunction with other frameworks and libraries, such as Redux for state management and React Router for client-side routing. It can be used to create web applications, mobile applications, and even desktop applications.

### 1.2 <u>VueJS</u>
[VUE JS](https://vuejs.org/guide/introduction.html#what-is-vue) is a lightweight JavaScript Framework used for development of user interfaces. 
It was released by Evan You in February 2014 as an open source project.It is developed in conjuction with HTML, CSS and Vanilla JavaScript to provide declarative and component-based user interfaces.

* Vue is designed to be easily adaptible and flexible. This is usually made possible by the following:

 * Static HTML enhancement without a build step
 * Including them as Web Components on any page
 * A One-Page Application (SPA)
 * Server-Side Rendering / Fullstack (SSR)
 * Static Site Generation / Jamstack (SSG)
 * Desktop, mobile, WebGL and the terminal.

## 2.0 <u>Overall comparison between ReactJs and VueJS.</u>

###2.1 <u> Differences between ReactJs and VueJs. </u>

To clearly illustrate the difference between the two, i will use table.

|    ReactJS     |    VueJS    |
|---------|--------|
|1. React is a library. | 1. Vue is a JavaScript framework.|
|2. Normal speed at runtime. | 2. Faster speed and smoother at runtime.|
|3. Released in May 2013. | 3. Released in February 2014.|
|4. Managed by Facebook. | 4. Not managed by any particular company or organization. However, the development and maintenance of Vue.js are led by its creator, Evan You, and a team of core contributors.|
|5. Uses JSX (JavaScript XML) approach for development| 5. Uses MVVM (Model-view-view-model)- a template-based  approach for development.|
|6. Employs a virtual DOM, which is an in-memory representation of the actual DOM. When the state of a component changes, ReactJS computes the difference between the virtual and actual DOMs and updates only the parts that need to be changed.| 6. Employs reactive rendering, which means that it directly manipulates the DOM to reflect changes in the state of the component.|
|7. ReactJS,  uses CSS Modules, which allow developers to import and use CSS styles in their components without worrying about naming collisions.| 7. VueJS allows developers to use scoped CSS, which means that styles defined in a component only apply to that component and its children. |

###2.2 <u> Similarities between ReactJs and VueJs. </u>
i). Virtual DOM

Both libraries make use of a virtual DOM, which is a memory-based representation of the real DOM. This enables efficient UI updates when the state of a component changes without having to re-render the entire page.

* React code:
```js
class Counter extends React.Component {
  constructor(props) {
    super(props);
    this.state = { count: 0 };
  }

  handleClick() {
    this.setState({ count: this.state.count + 1 });
  }

  render() {
    return (
      <div>
        <p>Count: {this.state.count}</p>
        <button onClick={() => this.handleClick()}>Click me</button>
      </div>
    );
  }
}

```

* VueJS code:
```js
<template>
  <div>
    <p>Count: {{ count }}</p>
    <button @click="count++">Click me</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      count: 0,
    };
  },
};
</script>

```
ii). Component-Based Architecture:

Both ReactJS and VueJS use a component-based architecture, which divides the user interface into reusable and independent components. This simplifies the management and maintenance of large and complex applications.

*React code snippet:
```js
function App() {
  return (
    <div>
      <Header />
      <MainContent />
      <Footer />
    </div>
  );
}

```
* VueJS code snippet:
```js
<template>
  <div>
    <Header />
    <MainContent />
    <Footer />
  </div>
</template>

```
iii). Single-Page Applications:

ReactJS and VueJS are both well-suited for building single-page applications (SPAs), where the application runs within a single web page, providing a seamless user experience.

* React code snippet:
```js
import React from 'react';
import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
import HomePage from './HomePage';
import AboutPage from './AboutPage';
import ContactPage from './ContactPage';

function App() {
  return (
    <Router>
      <Switch>
        <Route path="/" exact component={HomePage} />
        <Route path="/about" component={AboutPage} />
        <Route path="/contact" component={ContactPage} />
      </Switch>
    </Router>
  );
}

```
* VueJS code snippet:
```js
<template>
  <div>
    <router-link to="/">Home</router-link> |
    <router-link to="/about">About</router-link> |
    <router-link to="/contact">Contact</router-link>
    <router-view></router-view>
  </div>
</template>

<script>
import HomePage from './HomePage.vue';
import AboutPage from './AboutPage.vue';
import ContactPage from './ContactPage.vue';

export default {
  components: {
    HomePage,
    AboutPage,
    ContactPage,
  },
};
</script>

```
iv). Development of both mobile and desktop applications.

React is a versatile front-end library that can be used to develop a wide range of web applications, including mobile and desktop applications. With the help of additional frameworks like React Native and tools like Webpack and Babel, React can be used to create native mobile and desktop applications that can run on a variety of platforms.

Similarly, Vue.js is a versatile front-end framework that can be used to develop a wide range of web applications, including mobile and desktop applications with the help of various frameworks such as Electron and other tools. These tools may include Electron.

v). Reactive and Declarative:

Both ReactJS and VueJS use a reactive and declarative approach to building user interfaces. This means that when a component's state changes, the UI is automatically updated to reflect those changes, without having to manually manipulate the DOM.

* ReactJS Code Snippet:
```js
class Greeting extends React.Component {
  constructor(props) {
    super(props);
    this.state = { name: 'John' };
  }

  render() {
    return <p>Hello, {this.state.name}!</p>;
  }
}

```
* VueJS code snippet:
```js
<template>
  <p>Hello, {{ name }}!</p>
</template>

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

```
vi). Easy Integration with Other Libraries:

Both ReactJS and VueJS can easily integrate with other libraries and frameworks, allowing developers to leverage existing code and tools.

* ReactJS Code Snippet:
```js
import React from 'react';
import ReactDOM from 'react-dom';
import { Chart } from 'chart.js';

class ChartComponent extends React.Component {
  constructor(props) {
    super(props);
    this.canvasRef = React.createRef();
  }

  componentDidMount() {
    this.myChart = new Chart(this.canvasRef.current, {
      type: 'bar',
      data: {
        labels: this.props.labels,
        datasets: [
          {
            label: this.props.title,
            data: this.props.data,
            backgroundColor: this.props.backgroundColor,
          },
        ],
      },
    });
  }

  componentDidUpdate() {
    this.myChart.data.datasets[0].data = this.props.data;
    this.myChart.update();
  }

  render() {
    return <canvas ref={this.canvasRef} />;
  }
}

```
VueJS code snippet:
```js
<template>
  <canvas ref="canvas"></canvas>
</template>

<script>
import { Chart } from 'chart.js';

export default {
  props: {
    labels: Array,
    title: String,
    data: Array,
    backgroundColor: String,
  },
  mounted() {
    this.myChart = new Chart(this.$refs.canvas, {
      type: 'bar',
      data: {
        labels: this.labels,
        datasets: [
          {
            label: this.title,
            data: this.data,
            backgroundColor: this.backgroundColor,
          },
        ],
      },
    });
  },
  watch: {
    data(newData) {
      this.myChart.data.datasets[0].data = newData;
      this.myChart.update();
    },
  },
};
</script>

```


>In conclusion, both ReactJS and VueJS are powerful front-end frameworks that enable developers to create dynamic and responsive user interfaces. While there are some key differences between the two, including their component syntax, state management systems, and performance characteristics, they also share many similarities such as their use of virtual DOM and support for server-side rendering. 

>Choosing between ReactJS and VueJS is not about which one is better, but rather which one is better for your specific use case and development team. Each framework has its strengths and weaknesses, and understanding these differences is key to making an informed decision and building great applications.