How To Load Images Quickly With React Native Faster Image?
Quick Summary: Loading images quickly with React Native Faster Image is quite a simple process. Just follow the proper steps and get the best version for you. This one is an alternative available helpful in getting the images available from some other resources. One just needs to understand the steps that are important to follow to get it done. This article covers all the essential details for the image source react native so one can start with it effortlessly!
Introduction
The loading of images is one of the most intense aspects for each app. The slow image loading can bring the user experience down, as the users will have to wait for the photos to become visible before they can actually detach the app. React propagation libraries may provide you with a method to load images quickly. It mixes up some methods like caching, preloading, and lazy loading to quicken the image uploading process.
The feeling of working with a React Native framework is great. Many React Native image components such as High adaptable performance, maximum efficiency, and compactness are the best options. An example of one such feature is embedded language function. An additional feature that makes your work easier is that you can draw images from remote places that you may use in the application.
It is like image page caching and web caching are the same. Either is possible; maybe you’ve heard and are curious about what it is.
On the contrary, become familiar with fast image loading in react native Faster Image but watch out for that first. While accomplishing better results, the React Native Solutions Provider should be consulted.
Moreover, it is one of the many choices offered. For you the whole article is going to be important so if you stay with us we will cover its main points.
In React Native, what is image caching?
Caching is a beautiful approach to tackle image loading and re-rendering or Fast image rendering React Native from remote destinations. Download an image to the app’s cache directory (or any other directory available) and load it from local storage the next time the picture Improves image load time. Image caching is all about downloading an image.
In short, image caching helps to improve user experience because it automatically saves images in a server after displaying once. Then, the next time, display the page quicker. React native library administering caching images and perform better than other plugins or other product solutions. Additionally, the react native for image caching is pretty simple to use.
In React Native, there are a couple of different approaches to picture caching. If you’re designing a bare-bones React Native app, there’s a fantastic element called React Native FastImage that takes care of all your image caching without having to write any more code. You could even construct your image caching part from scratch using Expo or working on a more sophisticated project. It is possible to extract text from images using a React Native image to text converter, which is useful for several scenarios of image caching.
What is React Native FastImage?
React Native FastImage is a Quick image loading React Native. FastImage caches all loaded pictures. You may add your own auth headers and preload pictures to your requests.
To start with React Native FastImage, first, add the FastImage component to your project:
Implement React Native FastImage is basically a React Native library that is too easy to install through NPM and yarn commands for android. If you want to install an iOS application then the command is a bit different. After that, ready to use the React Native and avail the advantages faster.
require npm library
yarn add react-native-fast-image
or
npm install –save react-native-fast-image
After upgrading React Native 0.60, they included auto-linking, which means we no longer need to link the library but only need to install pods.
CocoaPods Installation
install pods
cd ios && pod install && cd ..
import FastImage from ‘react-native-fast-image’;
- The FastImage component’s basic implementation is below:
<FastImage
style={{ width: 100, height: 100 }}
source={{uri: 'https://unsplash.it/400/400?image=1'}}
/>
Using the FastImage component example
<FastImage
style={{ width: 100, height: 100 }}
source={{
uri: '...image...url...',
headers: { Authorization: 'AuthToken' },
priority: FastImage.priority.normal,
}}
resizeMode={FastImage.resizeMode.contain}
/>
As you can see, this example is very identical to the basic React Native image component, but with a few more features.
Let’s take a closer look at the code.
source the image, as well as its headers and other information.
URI the path to the image you want to load is represented.
headers are placeholders for any headers you might need (auth token in the example above)
priority of the images is indicated by priority for example, if you need to load a specific image first, you can set the priority to FastImage.priority.high
React Native Cache Property
FastImage.cacheControl.immutable is the default property for the FastImage component. If the URI changes, the image just caches or updates.
FastImage.cacheControl.web allows you to set up the FastImage component to cache images in the same way that the browser does, by using headers and the standard caching mechanism.
FastImage.cacheControl.cacheOnly To force the FastImage component to only fetch images that cache images, rather than generating fresh network queries.
Example cache property
<FastImage
style={{ width: 100, height: 100 }}
source={{
uri: 'https://unsplash.it/400/400?image=1',
cache: FastImage.cacheControl.cacheOnly
}}
/>
Different Properties of React Native FastImage
Simple FastImage with source + header
<FastImage
style={{ height: 100, width: 100 }}
source={{
uri: '<image_url_here>',
headers: { Authorization: 'token' },
}}
/>
FastImage with different priority
<FastImage
style={{ height: 100, width: 100 }}
source={{
uri: '<image_url_here>',
headers: { Authorization: 'token' },
priority: FastImage.priority.low,
//priority: FastImage.priority.normal,
//priority: FastImage.priority.high,
}}
/>
It FastImage with different resizeMode
<FastImage
style={{ height: 100, width: 100 }}
source={{
uri: ‘<image_url_here>',
headers: { Authorization: 'token' },
priority: FastImage.priority.normal,
}}
resizeMode={FastImage.resizeMode.contain}
//resizeMode={FastImage.resizeMode.cover}
//resizeMode={FastImage.resizeMode.stretch}
//resizeMode={FastImage.resizeMode.center}
/>
The FastImage with different Cache
<FastImage
style={{ height: 100, width: 100 }}
source={{
uri: '<image_url_here>',
headers: { Authorization: 'token' },
priority: FastImage.priority.normal,
cache: FastImage.cacheControl.immutable,
//cache: FastImage.cacheControl.web,
//cache: FastImage.cacheControl.cacheOnly,
}}
resizeMode={FastImage.resizeMode.contain}
/>
FastImage with Gif Support
<FastImage
style={styles.image}
source={{
uri: 'https://cdn-images-1.medium.com/max/1600/1*-CY5bU4OqiJRox7G00sftw.gif',
headers: { Authorization: 'token' },
priority: FastImage.priority.normal,
cache: FastImage.cacheControl.immutable,
}}
resizeMode={FastImage.resizeMode.contain}
/>
Image Corner Radius Control
<FastImage
style={{
height: 100,
backgroundColor: '#ddd',
flex: 1,
}}
source={{
uri: '<image_url_here>',
headers: { Authorization: 'token' },
priority: FastImage.priority.normal,
cache: FastImage.cacheControl.immutable,
}}
resizeMode={FastImage.resizeMode.contain}
/>
FastImage with Callback
<FastImage
style={{ height: 100, width: 100 }}
source={{
uri: '<image_url_here>',
}}
onLoadStart={e => console.log('Loading Start')}
onProgress={e =>
console.log('Loading Progress ' + e.nativeEvent.loaded / e.nativeEvent.total)
}
onLoad={e =>
console.log('Loading Loaded ' + e.nativeEvent.width, e.nativeEvent.height)
}
onLoadEnd={e => console.log('Loading Ended')}
/>
Installing React Native Fast Image
The command that one can consider with NPM for installing react-native-fast-images is as follows:
npm install react-native-fast-image
Apart from it, if the project you are working with is using Yarn, the command that can be in consideration is as follows
Yarn add react-native-fast-image
If you wish to use the same package as iOS, you will need a configuration.. A user may also need to run pod install in the iOS directory:
cd ios && pod install
After following all these steps, you are all set to utilize React Native’s fast Image
Conclusion
We’ve discussed all you need to know about React Native image loading and caching in this course, including building your react native image caching component from scratch and using react-native-fast-image in React Native. You must follow all the steps with concentration and not compromise on any factor. If there is something that you cannot discuss with the professionals around you, they will help you with it. Additionally, regularly there is something new available to people working with React. If something troubles you, join the React Native Community and discuss it with them!
FAQ
How do I reduce image loading time in react-native?
To reduce image loading time in React Native, consider optimizing images before use, choosing appropriate image formats (e.g., WebP), and resizing images to match display requirements. Utilize lazy loading techniques and implement image caching with tools like FastImage or React Native Image Cache. Additionally, leverage network optimization methods like content delivery networks (CDNs) and server-side compression. Minimizing the number of images, implementing progressive loading, and optimizing the app’s overall performance and React Native image optimization will enhance image loading React Native app and Speed up images React Native and improve user experience.
What does FastImage resizeMode contain?
The FastImage component in React Native contains different options for the “resize mode” prop that determine how the image should be resized and displayed within its container. The available options are “contain,” “cover,” “stretch,” “center,” and “repeat.” The “contain” mode scales the image to fit within the container while maintaining the react native image aspect ratio, resulting in potential space.
It’s beneficial when you want the entire image visible. The “cover” mode scales the image to cover the container entirely, potentially cropping parts of the picture. “Stretch” stretches the image to fit the container without maintaining the aspect ratio. “Center” centers the image without resizing and “repeats” tiles the image to fill the container.
The “resize mode” prop in FastImage provides a range of options to control how images are displayed, allowing developers to tailor the visual presentation to suit their app’s design and requirements.
What is resize mode in react native?
In React Native, the “resize mode” is a prop determining how an image should be adjusted and displayed within its designated container. This prop offers various options to control how the image is resized, scaled, and positioned. The available options include “cover,” which mounts the idea to cover the entire container while maintaining the aspect ratio; “contain,” which scales the image to fit within the container while also preserving the aspect ratio; “stretch,” which resizes the image to fill the entire container without regard for aspect ratio; “center,” which centers the image within the container without resizing; and “repeat,” which tiles the image to fill the container by repeating it. By selecting the appropriate “resize mode” option, developers can ensure images are displayed optimally and consistently across different devices and screen sizes.
How do you Optimize images in React Native?
To optimize image loading in React, you can use techniques like lazy loading, responsive images, and modern image formats like react native fast image webp. Use tools like Webpack’s image loader to compress and minimize image sizes. Implement image caching to reduce redundant downloads. Employ Content Delivery Networks (CDNs) for faster delivery. Prioritize critical images to improve perceived performance. Consider using libraries like “react-image” or “react-lazy-load” for efficient lazy loading for Efficient image handling React Native. Strive to balance image quality and file size to enhance the user experience and page loading speed.
Can I use react-native fast images with Expo?
No, React Native’s FastImage is not compatible with Expo by default. Expo provides its image component that handles image loading efficiently. Suppose you have specific performance requirements that FastImage addresses. In that case, you might consider detaching from the Expo-managed workflow and using React Native’s FastImage library and a custom native module setup.
