However, developers and designers should not have to manually transform images and generate new code to deliver image variants to the devices and browsers that support them. ImageEngines React component will take your original image, detect the requisition device, optimize, compress, and resize, and then deliver the image via its CDN. And since the business model of traditional CDNs are based on a price per gigabyte delivered basis, they have no interest in optimizing the payload. Check out the ImageEngine React component. rotate? : One way to better the performance here would be, when the user enters the screen, to only fire off the loading of the images that will be visible within the viewport and set the loading of the other images to lazy.So say youd only have 8 images visible at a time (oversimplified) your code could look something like this: Then when you enter the screen for all the other components that are out of view the Intersection Observer api will be used the determine when to start loading the images. At the end of the optimization cycle, image CDNs can reduce image payload up to 80%. Virtual cloud-based edge servers effectively serve the entire globe from only a few dozen locations. React image file resizer is a React module that allows you to rescale and resize images from the device's file system. How to tackle this issue Ill discuss in Part 3. Given their huge infrastructure investment, traditional CDNs need to keep data payloads large to pay for their legacy network costs. All you need is a free trial, no credit card required. React is an increasingly popular JavaScript front-end framework that works with most headless CMS like Contentful, Magnolia, Graphcms, Sanity, Prismic, Butter, Contentstack, Dotcms, Mura, Cockpit, Craft, Zesty.io, Kontent.ai. Reduce file size up to 80%. It involves cropping, compression, resizing, and other best practices. | "bmp" As you can imagine that obviously wont be great for performance. Improve web performance with ImageEngines React component.
, https://github.com/twobin/react-lazyload/issues?q=is%3Aissue+horizontal+scroll, https://www.facebook.com/Metaculescom-100856938688500, https://javascript.plainenglish.io/image-loading-in-react-js-preloading-lazy-loading-intersectionobserver-fade-in-transitions-722c24f4d5fb, https://javascript.plainenglish.io/react-image-loading-optimization-techniques-b885427bde44, https://react-window.now.sh/#/examples/list/fixed-size, https://www.npmjs.com/package/react-window, https://www.npmjs.com/package/react-lazyload. . If you have any additional things to add, improvements or if you want to send us some love or support for our project you can buy mea coffee or help Fund raise our creation of the Metacules an antidote the censorship platform via. // Possible range: 0-100. | "webp" Developers. Plugins. By separating the content and database of the CMS from the front-end framework like React, developers can free themselves from rigid templates of traditional CMS. }. | "jpg" Internally, React uses several clever techniques to minimize the number of costly DOM operations required to update the UI. New JavaScript and Web Development content every day. Virtual cloud-based edge servers effectively serve the entire globe from only a few dozen locations. Use the best possible image format the user's browser supports. width? An image CDN automatically manages all of the complexity of selecting the optimal image format for a device or browser. Consequently 3 seconds is the minimum, but aim for under 1 second. Frequently these images are much larger than they need to be, especially for mobile devices. Features. | "png" The Svg includes an svg file directly into the HTML so it can be styled by CSS. If you don't want to include them directly in the HTML, you can also use svg images together with the Img component which will reference it by the URL. Test your site with our ImageEngine demo tool and see what improvements can be made. // Keep EXIF data. This prevents the functionality for the user on web to save the image by right clicking on them. And since the business model of traditional CDNs are based on a price per gigabyte delivered basis, they have no interest in optimizing the payload. The problem here is that if, say, you have a collection of 250 persons (which is our case), that all the PersonCards will be rendered immediately when the component gets mounted and all 250 fire of a network request (if theyre not browser cached) to load their respective images. React-window at least made it possible to have a horizontal scrolling list where only the items within the viewport (+threshhold) got rendered, but unfortunately had its own issues. // Adjust sharpness. // Possible range: -360 to 360. This will add a 300ms lasting fade in transition between the unloaded state where opacity is set to 0 and the loaded state where the opacity is set to 1. It exposes an <Image/> component as a conventional single-source of truth. Image CDNs like ImageEngine have edge servers strategically positioned around the globe. Consequently 3 seconds is the minimum, but aim for under 1 second. If you have users spread out from New York to Singapore, from Milan to Cape Town, an Image CDN will ensure that your data has a shorter, and therefore speedier, journey to the user. }. We can start the optimization right after giving you a little bit of information about React. One thing that Ive noticed is that on mobile if I touch the image surfice a bit too long it would open a pop up same as the pop-up that shows when you right-click on the image. The average webpage is almost 2MB, and 50% of that payload is images. This article explores the easiest technique to get started with the integration of ImageEngine in React. crop? Nevertheless, there are several ways you can speed up your . For many applications, using React will lead to a fast user interface without doing much work to specifically optimize for performance. So what would an implementation looks like? Features: Optimize images using WebAssembly (runs in every environment) React components for different use-cases (responsive images, WebP conversion, lazy loading placeholders, image manipulation, .) If webp: false would not be present, it would get inherited from the default key. There are several problems with the traditional CDN model when it comes to images. In particular, it creates responsive versions of each image and proper sourceSet to serve the best image based on the screen resolution. An image CDN will leverage the devices parameters to automatically resize, compress and convert large original images into optimized images with next-generation file formats, like WebP and AVIF. Test your site on a third party speed test tool to see if it meets this requirement. For example, you can resize and crop, add overlay images, blur or pixelate faces, apply a large variety of special effects and filters, and apply settings to optimize your images and to deliver them responsively. An image CDN automatically manages all of the complexity of selecting the optimal image format for a device or browser. // Possible range: 0-100. pbj-reborn A beautiful chan for PBJ-related discussion. Check out the ImageEngine React component. Headless CMSs are an exciting trend that many web developers, enterprises, and eCommerce companies are adopting. Follow asked Jun 5, 2016 at 7:09. If you are using Next.js, you can use the next-optimized-images plugin instead for easier configuration. The code above is still a bit problematic though as there is a big performance issue here. : | "jp2" Many markets now find that over 50% of their visitors access sites using a mobile network. We would install the module in our app by using the command below: 1 $ npm install image-webpack-loader --save-dev. keepMeta? For an in-depth review of the many ways you can optimize your images, see Image optimization. pbj-reborn A beautiful chan for PBJ-related discussion. Follow to join 2.5M+ monthly readers. For example, ImageEninge can use Googles WebP file format to deliver optimized images to the Chrome browser. When you go to the podcast or the video page on the metacules website via your desktop or laptop youll see that rows can have tens and tens of items as well as there being tons of rows for different category types. 53% of people abandon a mobile page after 3 seconds. Automatic image lazy loading. // Don't apply any optimizations to the origin image. Benefits fall into categories five categories: ImageEngine provides a number of controls over how the image is presented. Part 1 ended with the basic setup for the creation of the PreloadImage component. This image components requires optimized-images-loader to already be installed and configured. This article explores the easiest technique to get started with the integration of ImageEngine in React. The Image component has a few props that you can use to control how it renders images. : number We want to make it effortless. height? : number We all know that images play a big role in a website performance. outputFormat? (native) Android Mobile specialist / React JS Web developer creator of the metacules.com platform, Create a Blog by Integrating Sanity.io, a Headless CMS, with Next.js, 10 Open Source Javascript Chart and Graph Libraries, Component Life Cycle MethodsFunctional vs Class Components, Mini-Project: Deploying JavaScript Application with Nginx, {persons && persons.map((person, index) =>, class PreloadImage extends React.Component {, https://www.facebook.com/Metaculescom-100856938688500, https://levelup.gitconnected.com/what-is-so-special-about-intersection-observer-api-in-javascript-f2430a159fa7, https://javascript.plainenglish.io/image-loading-in-react-js-preloading-lazy-loading-intersectionobserver-fade-in-transitions-722c24f4d5fb, https://react-window.now.sh/#/examples/list/fixed-size, https://www.npmjs.com/package/react-window. Try ImageEngine for 30 days - Up to 100 GB of Smart Bytes included. If youve only got a handful of images to optimize, then the task is relatively easy. A traditional content delivery network (CDN) focuses on pushing content as close as possible to the requesting user. sharpness? Follow to join 2.5M+ monthly readers. Image and video file formats are constantly evolving. directives? Even though, if you look through the issue posts on the GitHub repo of react-lazyload, it is mentioned and said that react-lazyload should work for horizontal scrolling list it doesnt when you expand the above naive implementation and wrap the mapped items into a LazyLoad component like the following: Vertical scrolling does work (and well get to that a bit further in the article), but I couldnt seem to get horizontal scrolling as simple all elements in the horizontal list would render immediately when the parent component render the first time. This is a React beginner friendly article, but in case youre completely new to React, you can brush up the basics from their documentation and those are enough for implementing the code discussed here. Mobile optimization is an image CDN's first and most critical step. The result is a faster, better mobile UX. There are many reasons to consider using an image optimizing component for React with your headless CMS. Either scale down the width to the specified . The component so far has functionality to set a 'placeholder' that would be set when the image loading fails.And besides that there is the 'lazy' property that can be set to either instantiate an Intersection Observer to the component that keeps track on when the component comes into the . compression? The component so far has functionality to set a placeholder that would be set when the image loading fails. An image CDN takes a radically different approach by changing the original static image into dynamic content by optimizing the image in different ways based on where the image is viewed. copy. : number The problem with react-window though is that when one scrolls through the list the items that are within the range of the viewport (+ threshold) seem to get re-rendered more than needed. // Adjust sharpness. // Set width to auto (with fallback). : true After successful installation, we need to configure it in our webpack.config.js file. Many commerce sites, for example, regularly add new products, and the accompanying images. | "mp4" For animated GIFs, an image CDN can convert them into MP4s or animated WebPs. Learn More >. Part 1 ended with the basic setup for the creation of the PreloadImage component. But lets first look at some things I wanted to have implemented to finish up the Image loading wrapper. React has quickly taken over as one of the top frameworks for developing front end web content today. If you would implement it like the UI doesnt adjust well when resizing, so you have to do that slightly different. Resize an Image Using React Image File Resizer. React is ranked as the first; React is an increasingly popular JavaScript front-end framework that works with most headless CMS like Contentful, Magnolia, Graphcms, Sanity, Prismic, Butter, Contentstack, Dotcms, Mura, Cockpit, Craft, Zesty.io, Kontent.ai. x Desktop environment in the browser. This enables an image CDN to deliver quickly to a range of devices at a lower cost. This is a React beginner friendly article, but in case youre completely new to React, you can brush up the basics from their documentation and those are enough for implementing the code discussed here. : { New JavaScript and Web Development content every day. 53% of people abandon a mobile page after 3 seconds. If you dont do this the list will still be displayed vertically. pbj-reborn A beautiful chan for PBJ-related discussion. Third group: Improving the stability of the application by investing in testing and continuous deployment. // Possible range: 0-100. Image and video file formats are constantly evolving. Once you've imported the component, you can use it like any other in React. : true | "webp" // Possible range: 0-100 (float). You can use ImageEngine directives to do so without modifying the source image. : true // Keep EXIF data. // Define desired output format. If you want to know more or want to come help out on the creation of Metacules.com get in contact with me and follow me on any one of the channels to stay updated on future postings. An image CDN tailors the file to supply the largest image needed, and nothing larger. For animated GIFs, an image CDN can convert them into MP4s or animated WebPs. // Define desired output format. All of these next-gen image formats are typically 30% more effective than a standard JPEG--and that is before further device-driven compression or resizing. We will be looking at the cropping and compression techniques in this article. Add the react-optimized-image/plugin babel plugin to your .babelrc file. Next.js offers better performance and scalability than React, thanks to its built-in support for server-side rendering, code splitting, and image optimization. By optimizing images and delivering via its CDN, ImageEngine will accelerate page loading, improve SEO, and increase sales conversions. Note: the list component is using React.memo() to only re-render if its properties actually got changed. This means you only need to learn how to use one API to handle image optimization in Next.js. noOptimization? Responsive Images built with Bootstrap 5, React 17 and Material Design 2.0. // Set width to auto (with fallback). They are a heavy asset which can slow down the page loading time and optimizing them for responsive view and async loading can be a daunting task. (native) Android Mobile specialist / React JS Web developer creator of the metacules.com platform, 6 Modern Javascript Aspect of Literals You Must Know, Why You Have to Use Proxy UI Components in 2022 . React is a simple yet powerful UI library developed by Facebook. | "svg" Typically, they do this by having edge servers at many Points of Presence (POPs) all over the world. By pushing optimized images closer to requesting customers with logic to deliver immediately from cache, often providing a 50% faster web page download time than traditional CDNs. The average webpage is almost 2MB, and 50% of that payload is images. So there are 2 more things I wanted to have implemented: The final implementation of my Image loader wrapper then would like like this: So there are a couple of updates compared to the implementation from Part 1. outputFormat? autoWidthWithFallback? fitMethod? Additionally, it can create a WebP fallback and provide different sizes for different viewports. width? CDNs maintain edge servers around the globe with cached images, close to the end user. Whether it is an Apple laptop, a Samsung Galaxy S9 smartphone, an Apple iPad Air 2, or a Motorola G3 smartphone, a traditional CDN will send the same large original image. | "gif" sharpness? If you would like to serve your images directly from a CDN or image server, you can write your own loader function with a few lines of JavaScript. : true Likewise, it can deliver WebP or JPEG 2000 to Apples Safari browser. Frequently these images are much larger than they need to be, especially for mobile devices. (You could manually resize and serve different sized images, but its simply impractical to. | "jpg" Unfortunately, many people are still not on 4G, let alone 5G networks. Some sites are webpagetest, PageSpeed Insights by Google, and ImageEngines demo. React Bricks optimizes your images as you upload them. : "stretch" | "box" | "letterbox" | "cropbox" Problems encountered with react-lazy-load & react-lazyload Initially I started of using packages like react-lazy-load and react-lazyload (of which the second seems to be the more popular one). Cloudinary's React library simplifies the generation of transformation URLs for easy embedding of assets in your React application. Because an image CDN reduces image payload and response time so dramatically, it is no longer necessary to build out a CDN with thousands of POPs. If you want to keep track of updates to that issue you could follow the issue here: https://github.com/twobin/react-lazyload/issues?q=is%3Aissue+horizontal+scroll. height? There are many reasons to consider using an image optimizing component for React with your headless CMS. directives? Frequently, an image CDN like ImageEngine will reduce the image payload by up to 80%. Features: Optimize images using WebAssembly (runs in every environment) React components for different use-cases (responsive images, WebP conversion, lazy loading placeholders, image manipulation, .) The Cloudinary React library provides plugins to render the media on your site in the most optimal way and improve your user's experience: Lazy Loading to delay loading images if they are not yet visible on the screen. To make use of horizontal scrolling you not only should set the value of the layout property to horizontal, but also make sure that you pass the style of the List component and set it on its children like: style={{style, etc.}}. If you have any additional things to add, improvements or if you want to send us some love or support for our project you can buy mea coffee or help Fund raise our creation of the Metacules an antidote the censorship platform via. Optimized images combined with a CDN will generate a range benefis for websites using a React front-end framework. Pages load faster, generating more conversions and better SEO. Many commerce sites, for example, regularly add new products, and the accompanying images. Adding 3/4 lines of code using the Image component we are providing image optimization, cached images, lazy loading etc so . By pushing optimized images closer to requesting customers with logic to deliver immediately from cache, often providing a 50% faster web page download time than traditional CDNs. The problem with react-window though is that when one scrolls through the list the items that are within the range of the viewport (+ threshold . | "png" We will walkthrough the following topics: You can also refer to the ImageEngine React.js documentation. This functionality now doesnt work as desired anymore as whenever the List item with the ImageLoading component gets remounted the the images start flickering as the transition animation from 0 to 1 opacity start a new.How to solve that?You could hack a solution here with somehow keeping track of which images have been loaded already and went through the fade in animation before, so that any consecutive time the ImageLoading component gets re-mounted with the same image you dont show the fade in anymore. : number Below you can see an example of a website coded with React Framework; And below you can find top 10 important websites coded with React; In the following image, you can find which JS frameworks market leaders use. Future proof. crop? Add the console log there to see for yourself when the component gets rendered or not and what the difference would be between using memo or not. It does basic resizing and compression, including adjusting the image's width, height, quality, rotation, and format. Improve web performance with ImageEngine's React component. scaleToScreenWidth? // Define desired height. keepMeta? An image CDN tailors the file to supply the largest image needed, and nothing larger. Typically, they do this by having edge servers at many Points of Presence (POPs) all over the world. : number If true, the image will get converted to WebP. Not setting the lazy property would invoke the setPreloader() function that will preload the image as soon as the component gets mounted. Using the next/image API. Let's face it, image optimization is hard. For this Ill be covering the usage of react-window (for horizontal scrolling) and react-lazyload (for vertical scrolling). Gitgithub.com/cyrilwanner/react-optimized-image, github.com/cyrilwanner/react-optimized-image#readme, *, *, *, *, *, *![]()
component isnt always called when an image fails to load. // Crop the image [width, height, left, top]. | "jxr" Image optimization in React.js. I didnt do deep research into how react-window actually works under the hood, but it seems like on re-renders react-window actually unmounts and remounts its List components. 2. Optimized images combined with a CDN will generate a range benefis for websites using a React front-end framework. Unfortunately, many people are still not on 4G, let alone 5G networks. // Define desired width. At the end of the optimization cycle, image CDNs can reduce image payload up to 80%. Optimize Contentful's images for your entire website or app by using the automatic image optimization in ImageEngine's React, Vue, and Angular components. Learner Learner. Both 2 highly popular packages with over 200k downloads which I tried out and solved the issue of only start loading the images right before they start . We will walkthrough the following topics: You can also refer to the ImageEngine React.js documentation. This requires intelligent, device-aware edge servers. outside of the viewport the viewport dont get pre-maturely rendered and hence decrease performance. Follow me to stay updated on future postings. 1. A traditional CDN does not know the screen size of the requesting device. fitMethod? And social media sites regularly handle huge quantities of user-generated images. // Adjust compression. Below is a list of the directive that are available in the React image component. React-virtualized and react-window (the light-weight counterpart) seem to be go to solutions for dealing with optimization regarding not rendering items that are outside of the window's viewport. : number After implementing ImageEngine, all of your images will be delivered in the most optimal image format, including next generation image formats like WebP, AVIF, and JPEG 2000. And social media sites regularly handle huge quantities of user-generated images. 1. inline? For the moment I choose for a react-window based solution where images are loaded without the fade in transition animation. Check out the ImageEngine React component. There are several problems with the traditional CDN model when it comes to images. Improve web performance with ImageEngines React component. Next.js can also automatically adopt future image formats and serve them to browsers that support those formats. // Define rotation. // Don't apply any optimizations to the origin image. The code ensures you don't spend too much time and memory while rendering. React. What is useState in ReactJs, and why it is used? Whether it is an Apple laptop, a Samsung Galaxy S9 smartphone, an Apple iPad Air 2, or a Motorola G3 smartphone, a traditional CDN will send the same large original image. It detects the requesting device model and all capabilities that impact image size and quality. Rik van Velzen is founder of Metacules.com, a senior (Android) mobile developer and currently developer on the metacules platform using React/NodeJs.You can follow us on social media: - Twitter: https://twitter.com/VelzenRik- Twitter: https://twitter.com/metacules- Facebook: https://www.facebook.com/Metaculescom-100856938688500, Screenshot part of the Landing Page of metacules.com. Examples with hover effect, shadows, thumbnails, masks and many others with a use of a single class. All you need is a free trial, no credit card required. // Define desired fit method. : number If true, the image will not get optimized (but still resized if the, So you don't have to repeat yourself by setting the same sizes or other properties on many images, specify the image type which equals to one in your, All other properties will be directly passed to the. So far for the complete implementation of the wrapper class for loading images. Abraham George September 24th, 2019. And besides that there is the lazy property that can be set to either instantiate an Intersection Observer to the component that keeps track on when the component comes into the vicinity of the viewport and consequently start loading the image from the network. Convert to WebP automatically during a webpack build. This enables an image CDN to deliver quickly to a range of devices at a lower cost. // Adjust compression. That was a hustle. This will convert all images to WebP. x Desktop . In our case though we have these ImageLoading components that also take care off adding a smooth opacity transition animation to bring the Image into view. As a result, it is essential to optimize your images to improve app performance. Image optimization React component. React Image Optimization. // Define desired width. // Possible range: 0-100. Mobile optimization is an image CDN's first and most critical step. : true ImageEngines React component will take your original image, detect the requisition device, optimize, compress, and resize, and then deliver the image via its CDN. | "mp4" (You could manually resize and serve different sized images, but its simply impractical to. Last thing I wanted to mention is that you also have to set the width of the list (which is being used to calculate how many items should be rendered). To frontend web developers, image optimization involves the various techniques used to improve image rendering and upload. An image CDN will leverage the device's parameters to automatically resize, compress and convert large original images into optimized images with next-generation file formats, like WebP and AVIF. With any client-side libraries, there is often a lot of JavaScript from the React core . The simplified version of our component that displays the PersonCards would look something like this: Note that we now have a List component (from react-window) which contains a child component that basically is the template/placeholder for every list item in the list. Apparently I wasnt the only one running into this issue and there is still an open ticket for requesting an example to show us that (and if and how) it actually works. // Crop the image [width, height, left, top]. Build cache for images for faster builds. Image optimization. If you look at the podcast screen on metacules.com you will see when you scroll down that at some point there are a whole lot of rows displaying podcasts by category. If you look at the Persons card/list on the Homescreen (see screenshot above) of the metacules.com website youll find a card list of about 250300 persons.If youre code to render the card containing the images would look something like the code below youll run into some issues here: If you have a list of 300 person cards, youll be rendering 300 divs which all fire off loading images from the web. If true, the image will get forced to be referenced with an url, even if it is a small image and would get inlined by default. Second group: Improving performance by using the latest React Native features or turning some of them on. It also creates a blurred low resolution version to load when the image is outside of the viewport. On metacules.com the cards take 60% of the screen width so I have done that by taking the windows innerWidth. The default loader for Next.js applications uses the built-in Image Optimization API, which optimizes images from anywhere on the web, and then serves them directly from the Next.js web server. So now what? For example, ImageEninge can use Googles WebP file format to deliver optimized images to the Chrome browser. Not ideal, but if you look at the rows on f.e. // Use WURFL to calculate screen's width and then scale the image accordingly. React-virtualized and react-window (the light-weight counterpart) seem to be go to solutions for dealing with optimization regarding not rendering items that are outside of the windows viewport. But with thousands of images, optimization and management challenges can quickly multiply the scale of your workload. Try for free. : number[] In the next part well go deeper into the things I needed to consider to make sure the components (that hold these images f.e.) Resize the image to the given width. To provide a good user experience, sites . // Define desired height. | "jxr" By optimizing images and delivering via its CDN, ImageEngine will accelerate page loading, improve SEO, and increase sales conversions. image; compression; react-native; Share. : "stretch" | "box" | "letterbox" | "cropbox" With this basic knowledge of React, you know that this is a much better option for user interfaces. . Learn how to use react-optimized-image by viewing and forking example apps that make use of react-optimized-image on CodeSandbox. I like to prevent that as it is not part of my apps UI functionality. But still 250 PersonCard components would be rendered every time its parent component renders instead of just the PersonCard components that are within the viewport. ImageEngine also offers AVIF, of the newest image formats. If youve only got a handful of images to optimize, then the task is relatively easy. First group: Improving performance by understanding React Native implementation details and knowing how to make maximum out of it. Is there an api or library to compress a PNG image file in React Native? So much for horizontal scrolling. Today I will show you to work with images perfectly in React app. // Possible range: -360 to 360. While caching will help with re-rendering, you may want to ensure that images don't delay your app launch. rotate? : number If you have users spread out from New York to Singapore, from Milan to Cape Town, an Image CDN will ensure that your data has a shorter, and therefore speedier, journey to the user. To render the persons collection on that row you could create a div that would look something like: This does pose a serious performance issue though, which would only multiply with every row of items youll add to a page. // Use WURFL to calculate screen's width and then scale the image accordingly. An image CDN takes a radically different approach by changing the original static image into dynamic content by optimizing the image in different ways based on where the image is viewed. . To use it, simply import the component from the next/image package. Try ImageEngine for 30 days - Up to 100 GB of Smart Bytes included. : number To optimize images in our react application, we would use the image-webpack-loader module. Additionally we added fade-in transition through animating the image opacity from 0 to 1, to prevent the hard transition from an image coming into visibility and we disabled the possibility to download the image by right clicking on it, or more annoying, by long-pressing it on mobile devices.For all this you of course have to check out the previous articles. TimeRangeRxJS custom function that emits a set of values in specified timeouts, Add JWT Authentication in Your LoopBack 4 Application, [ZH]3~2021~~~[HD-1080p]. This already gets you a long way. We created an implementation that contained functionality that could conditionally preloading Images as well as kick of the images network request when the Image component would come within a certain threshold of the viewport (using the Intersection Observer API). Test your site on a third party speed test tool to see if it meets this requirement. Use cases. However, developers and designers should not have to manually transform images and generate new code to deliver image variants to the devices and browsers that support them. Optimize React Native Code. 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