What is React Loader?
Updated on 13th Dec, 23 9.1K Views

In this blog, we’ll embark on a journey into the world of adding loaders in React.js! Picture this: you’re building a fantastic web application, and you want to ensure your users have the best experience possible. That’s where loaders come in! We’ll explore a plethora of delightful libraries and methods that can help you seamlessly integrate loaders into your React.js projects. These loaders will bring a touch of magic to your app, giving users visual feedback while data is being processed or fetched from APIs. So, get ready to enhance your user experience with captivating loaders that’ll leave everyone smiling!

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What is React Loader?

React Loader is a general term used to describe a visual indicator that communicates to users that the application is fetching or processing data. It’s often a spinner, progress bar, or other visual cues that keeps users informed of the app’s status, preventing them from becoming impatient or frustrated with unresponsive interfaces.

In the context of React, loaders are implemented using various libraries and techniques, which we’ll explore in this post. These libraries make it easy for developers to integrate loaders into their applications, ensuring a more streamlined and enjoyable user experience.

React Loader Spinner – A Simple and Elegant Solution

React Loader Spinner - A Simple and Elegant Solution

A popular choice among developers is the react-loader-spinner library. This library provides a collection of pre-built spinner components that can be easily imported and used in your React projects. With minimal configuration, you can add a sleek and visually-appealing loader to your application, signaling to users that the application is working in the background.

To get started with react-loader-spinner, simply install the package using npm or yarn:

npm install react-loader-spinner

Next, import the Loader component, and use it in your application like any other React component

import React from 'react';
import Loader from 'react-loader-spinner';
const App = () => {
  return (
    <div>
      <h1>Loading data...</h1>
      <Loader type="Puff" color="#00BFFF" height={100} width={100} />
    </div>
  );
};
export default App;

This simple example demonstrates how to add a loader in react js using the react-loader-spinner library. With a wide range of spinner types and customization options, react-loader-spinner is an excellent choice for developers seeking an easy-to-implement solution.

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Loader in React JS – Managing Loading State

When incorporating a loader into your application, it’s crucial to manage the loading state efficiently. This ensures that the loader is displayed only when necessary, preventing unnecessary renderings and maintaining a smooth user experience.

In this section, we’ll explore how to manage the loading state in a React application using hooks and state management libraries.

  • Using `useState` and `useEffect` Hooks
    React hooks, introduced in version 16.8, provide a way to manage state and side effects in functional components. The useState and useEffect hooks are particularly useful for managing loading states.

    Here’s an example of how to use these hooks to display a loader while data is being fetched
import React, { useState, useEffect } from 'react';
import Loader from 'react-loader-spinner';
const App = () => {
  const [loading, setLoading] = useState(true);
  const [data, setData] = useState([]);
  useEffect(() => {
    fetchData().then((response) => {
      setData(response);
      setLoading(false);
    });
  }, []);
  return (
    <div>
      {loading ? (
        <Loader type="Puff" color="#00BFFF" height={100} width={100} />
      ) : (
        <div>{/* Render data here */}</div>
      )}
    </div>
  );
};
export default App;

In this example, we use the useState hook to manage the loading state and the useEffect hook to fetch data and update the state accordingly. When the data is available, the loader is hidden, and the content is displayed.

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  • State Management Libraries
    In more complex applications, managing loading states can become cumbersome. In these cases, state management libraries like Redux or MobX can help streamline the process. These libraries enable you to centralize your application’s state, making it easier to manage loading states and other app-wide concerns.

React Content Loader- Creating Customized Loading Skeletons

React Content Loader is a library that allows you to create customizable loading skeletons, which are animated placeholders that mimic the shape of the content being loaded. These skeletons provide a more engaging and visually appealing alternative to traditional loader spinners.

To get started with React Content Loader, install the package using npm or yarn:

npm install react-content-loader

Next, import the ContentLoader component and create a custom skeleton using SVG elements:

import React from 'react';
import ContentLoader from 'react-content-loader';
const MyLoader = () => (
  <ContentLoader viewBox="0 0 400 160" speed={2}>
    <rect x="10" y="10" rx="5" ry="5" width="380" height="20" />
    <rect x="10" y="60" rx="5" ry="5" width="380" height="20" />
    <rect x="10" y="110" rx="5" ry="5" width="380" height="20" />
  </ContentLoader>
);
export default MyLoader;

This example demonstrates how to create a custom loading skeleton using React Content Loader. By adjusting the SVG elements and their attributes, you can create unique, engaging loading skeletons tailored to your application’s content.

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React Native Loader – Loading Indicators for Mobile Apps

React Native is a popular framework for building cross-platform mobile applications using React. Just like in web applications, loaders play a crucial role in providing engaging user experiences in mobile apps. Fortunately, many of the libraries and techniques covered in this post can be applied to React Native projects as well.

The React Native community has developed a variety of libraries for implementing loaders, such as react-native-loading-spinner-overlay and react-native-indicators. These libraries offer a range of pre-built loader components that can be easily integrated into your React Native projects.

To implement a loader in your React Native app, you can follow these steps:

  • Install the required packages.
npm install react-native-loader --save
  • Import the necessary components in your JavaScript file.
import React from 'react';
import { View, Text } from 'react-native';
import Loader from 'react-native-loader';
Create a state variable to manage the loader's visibility.
const [isLoading, setIsLoading] = React.useState(false);
  • Render the loader conditionally based on the ` isLoading` state.
return (
  <View>
    {/* Your app content */}
    {isLoading && <Loader />}
  </View>
);
  • Whenever you need to display the loader, set ` isLoading` to ` true`. For example, you can show the loader while fetching data from an API
const fetchData = async () => {
  setIsLoading(true);
  try {
    // Perform your data fetching logic
    // Await API requests, database queries, etc.
  } catch (error) {
    // Handle error
  } finally {
    setIsLoading(false);
  }
};

By following these steps, you can integrate a loading indicator into your React Native app using the React Native Loader component. This way, your app’s users will be aware of ongoing operations and stay engaged with your application.

Prop Types

In React and React Native, PropTypes is a helpful package that allows you to define the types of props passed to your components. By using PropTypes, you can ensure that the correct data types are passed to your components, which helps catch errors and improves the maintainability of your code.

To use PropTypes in your React Native components, you can follow these steps.

  • Install the prop-types package.
npm install prop-types --save
  • Import the PropTypes module in your JavaScript file.
import PropTypes from 'prop-types';
  • Define the propTypes for your component by creating a static propTypes object within your component’s class or function component.
// Class component example
class MyComponent extends React.Component {
  static propTypes = {
    name: PropTypes.string,
    age: PropTypes.number,
    isOnline: PropTypes.bool,
    onClick: PropTypes.func,
  };
  // Component logic
}
// Function component example
function MyComponent(props) {
  // Component logic
}
MyComponent.propTypes = {
  name: PropTypes.string,
  age: PropTypes.number,
  isOnline: PropTypes.bool,
  onClick: PropTypes.func,
};

Props that are available in the react-loader-spinner library. Here’s a brief explanation of each prop

  • visible – A boolean value that defines whether the spinner should be visible or not. The default setting is false.
  • type – A string that defines the type of the spinner. For example, “Circles”, “Audio”, “Bars”, etc.
  • height – A number that defines the height of the spinner. The default value is 80.
  • width – A number that defines the width of the spinner. The default value is 80.
  • color – A string that defines the color of the spinner.
  • secondaryColor –  This prop is available on the Plane and MutatingDots loaders. It defines the secondary color of the spinner.
  • timeout – A number that defines the effective periodic time of the spinner.
  • radius – A number that defines the radius of the spinner.

These props allow you to customize the appearance and behavior of the spinner in your React application. You can pass them to the Loader component to create a loading spinner that matches your application’s style and requirements.

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React Bootstrap Loader – Integrating Loaders with React Bootstrap

Popular UI framework React Bootstrap offers a selection of pre-made, Bootstrap-themed components for usage in React projects. The Spinner component, which makes it simple to include loader spinners in your application, is one of the React Bootstrap components.

To get started with React Bootstrap Loader, first install the react-bootstrap package

npm install react-bootstrap

Next, import the Spinner component and use it in your application

import React from 'react';
import { Spinner } from 'react-bootstrap';
const App = () => {
  return (
    <div>
      <h1>Loading data...</h1>
      <Spinner animation="border" role="status">
        <span className="sr-only">Loading...</span>
      </Spinner>
    </div>
  );
};
export default App;

In this example, we show how to use the React Bootstrap Spinner component to add a loader to ReactJS. React Bootstrap Loader is a great alternative for developers creating applications with React Bootstrap since it offers a variety of customization choices.

Styling in React Loader

Styling in React Loader

React Loader provides a simple and flexible way to customize the appearance of loading spinners or progress bars in your React applications. You can style the loader using CSS or inline styles. Here’s how

  • Set the size of the spinner
    You can set the size of the spinner by passing the width and height styles to the style prop of the Loader component. For example
<Loader loaded={!loading} style={{ width: '50px', height: '50px' }}>
  <div>
    {/* your content goes here */}
  </div>
</Loader>

This will set the width and height of the spinner to 50 pixels.

  • Set the color of the spinner
    You can set the color of the spinner by passing the color style to the style prop of the Loader component. For example
<Loader loaded={!loading} style={{ color: 'blue' }}>
  <div>
    {/* your content goes here */}
  </div>
</Loader>

This will set the color of the spinner to blue.

  • Center the spinner
    You can center the spinner using flexbox by setting the display style of the parent container to flex, and the justifyContent and alignItems styles to center. For example
<div style={{ display: 'flex', justifyContent: 'center', alignItems: 'center', height: '100vh' }}>
  <Loader loaded={!loading} style={{ width: '50px', height: '50px' }}>
    <div>
      {/* your content goes here */}
    </div>
  </Loader>
</div>

This will center the spinner vertically and horizontally within the parent container.

In addition to these options, you can also customize the appearance of the loader by passing additional props to the Loader component. For example, you can use the type prop to specify the type of spinner you want to use, or the timeout prop to set the timeout before the fallback content is displayed.

Loader for React – Choosing the Right Library

With so many loader libraries and techniques available, it can be challenging to choose the right one for your project. When evaluating loader libraries, consider the following factors:

  • Ease of use – How simple is it to integrate the library into your project and customize the loader components?
  • Visual appeal – Does the library offer pre-built loader components that match the aesthetic of your application, or can you easily create custom loaders that align with your design?
  • Performance – Does the library have any known performance issues or limitations that could impact your application’s performance?

By considering these factors, you can select the loader library that best meets your project’s needs and ensures a seamless user experience.

Conclusion

We’ve covered the idea of React Loader and its numerous implementations in this extensive guide, including react loader spinner, loader in react js, react content loader, react native loader, and react-bootstrap loader. You may develop interesting, user-friendly applications that keep users updated on the app’s progress and offer a seamless experience by utilizing these libraries and methodologies.

Keep in mind the value of user experience and the part loaders play in producing a fluid, pleasurable user journey as you continue to develop React applications. You are prepared to take on any job and produce top-notch outcomes with the information and resources in this post.

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