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If your application is retrieving image URLs using an API call (such as to a CMS), you may be able to modify the API call to return the image dimensions along with the URL. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. This performance problem is so annoying to users that it has its own Core Web Vital, called Cumulative Layout Shift. 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. If we want to make sure none of our users have to wait for that transformation, we can use Eager Transformations to make sure those are processed after we upload. The Cloudinary Upload API only supports a single file upload at a time, but it does have a high concurrency rate, so you can use multi-threads to upload many files at once. How to get the last N records in mongodb? Dont forget to share your ticket on social media itll be even more fun now you know how it works! Thats way more pixels than I need and when considering many more people uploading images that size or larger, thats going to quickly eat up my storage. Open Graph meta tags are used in the of an HTML page to expose information about web pages to social media platforms and other applications that unfurl URL metadata. That can include simple examples like uploading a profile photo or avatar to more complex examples like an in-browser image editor. Finally, add anchor links to the Index component below the image tag, with your configured Twitter and LinkedIn share URLs. That list of elements however is a Node List, where we cant use convient methods like Array.find, so we first convert that List into an Array using Array.from then use find to look for the element that has a name of file which is the name assigned to the input in our form. Inside of the handleOnSubmit function, add the following: Starting off, the event thats passed in as an argument includes a currentTarget property which refers to our form that was submitted. How did this note help previous owner of this old film camera? When using layout='responsive', the parent element must have display: block. But now we can kick off a separate request to remove our background. First, let's import useEffect from React: Then we want to store this transparent image upload separately, so let's set up a new instance of state: Inside of our page, we want to show our upload data and uploaded image, so under the uploadData add: We're also adding a check if our upload data is available but not the transparent data so that we have some kind of basic loading indicator. Once there, well want to select the Upload tab. You could even be generating new images based on that uploaded media after running it through AI-based transformations! When using layout='fill', the parent element must have position: relative. Lets get started! The API "works" but the first upload is always empty and never pushed to the product model of mongodb, also the API gets only the last image. Note: when using signed uploads, you also have the option of including your Incoming Transformations via the SDK! Once we have our form, we can further grab all of the inputs and generally all of the elements of the form using form.elements. While were not doing anything with the UI yet, we can see this working by trying to click Upload and watching our network requests. What if I don't know the size of my images. Now, there are many different services out there but cloudinary is one of the best and easy to use in a React NextJS app and also taught in the course by Wes Bos. Now that were diving into the code, lets open up our pages/index.js file and scroll down to the handleOnSubmit function. Woo! Because Next.js does not have access to remote files during the build process, you'll need to provide the width, height and optional blurDataURL props manually: Learn more about the sizing requirements in next/image. For most layout modes, the Image component will have a DOM structure of one tag wrapped by exactly one . And finally we want to perform the upload itself, so add the following under our transparentData state instance: This is a big one, so let's break it down: So after all of that, we can now try to upload an image again, and if we're patient waiting a few seconds after our first successful upload, we should see that below our uploaded data, we should see our transparent data! Once successfully uploaded, we well get our new URL, but well also see that our file was transformed to our settings! We can also see that by default, we already have a preset defined! Consider using CSS to give the image's parent element space on the page, then using the objectFit property with fill, contain, or cover, along with the objectPosition property to define how the image should occupy that space. Select your template image and after a second or two, youll see the new image asset in your dashboard. Heres the URL well be working with in development. For example, say I want to collect awesome pictures of space and I find this cool X-ray based image of another galaxy. Add the following getServersideProps() function to the bottom of your index.js file. For the purposes of this tutorial, we can use Math.random() to generate a ticket number. We'll be using the Cloudinary Node SDK in order to upload our images and make the available to change the background. Click Edit below that title where we should now get a modal where we can configure our transformation. With our Upload endpoint, we can now pass this right along using a POST request, which will tell Cloudinary we want to upload that image, and get a URL and it's details in response. Now because we're storing the active background ID in state, we need to create that new instance of state. Step 0: Creating a new Next.js app from a demo starter, Step 1: Setting up an Upload Preset for unsigned Cloudinary uploads, Step 2: Uploading an unsigned image to Cloudinary by URL, Step 3: Applying Incoming Transformations when uploading an image to Cloudinary, modern formats and compression techniques, How to Create an Image Placeholder Service API with Cloudinary & Netlify Functions, How to Update Static Content in Next.js Automatically with Incremental Static Regeneration (ISR), How to Generate BlurHash Placeholders with Cloudinary Custom Functions & Netlify, How to Automatically Optimize Headless WordPress Images and Videos with the Cloudinary Plugin, How to Detect Long Press Gestures in JavaScript Events in React, The function that fires when the form changes, The function that fires when the form is submitted, Set the Format quality to be Automatic Best Quality. For some modes, it may also have a sibling for spacing. These multiple URLs are used in the automatic srcset generation, so that visitors to your site will be served an image that is the right size for their viewport. Instead, we can take advantage of Cloudinary AI using it's background removal tool to cut out our images and swap in whatever background we'd like! Well display the name query parameter on the ticket, and well use the isShared parameter to configure how the page looks depending on whether the page has been visited by the ticket holder, or shared and visited via social media. The import must be static so it can be analyzed at build time. There are a lot of use cases for giving your site visitors the ability to upload media beyond trying to be the next big image hosting solution. Once that's completed, we have our base image uploaded, but our background isn't removed, so we need to keep checking until it's complete, so Once that endpoint returns the response that the removal was complete, it returns the resource back, At which point we store that transparent data locally, Adding a new section if we have a transparent image, Using an unordered list to list out each available background image, Setting up the image URL with resizing using Cloudinary to deliver only the size we need for the thumbnail, First we create a variable using let because we only want to define this under conditions, which are complicated, so we're avoiding doing it in a single line, If we have transparent data and a background selected, Create a new image instance using our transparent image. Head over to https://cloudinary.com/ and create an account. To do this, we're going to use the Cloudinary URL Gen SDK, which will allow us to create our transformations in our React app, where the Node SDK is only available in Node (like our serverless function). Inside of our form we'll see where we're adding the image using imageSrc. What are the purpose of the extra diodes in this peak detector circuit (LM1815)? Previously, I wrote about using Puppeteer to generate dynamic images for social sharing. One in particular, is applying a transformation to our asset upon upload. Finally, lets configure the web page for visitors to your site who clicked on a link from social media. Transformations like face detection help us make sure when cropping images, were doing so intelligently to create the best experience we can. Delete most of the boilerplate code from index.js until youre left with a nice blank canvas to work with: The image stored in Cloudinary will be personalized with the name of the ticket holder, grabbed from a URL parameter. In my first article i changed the menu to hamburger menu from the normal menu. When we get our image, well store it there to display in the UI and when were ready to upload, well collect the response data to use that in our app. Note that Ive used the font Arial instead of the custom font used in the URL above. For changing our background, we're going to use a feature called underlays, meaning, we're going to create a new layer .css-2ygcmq{font-weight:var(--chakra-fontWeights-semibold);}underneath our base layer. Theres just one more step. .css-n1qs49{border-radius:8px;margin:0 auto;}. The value of className will be automatically applied to the underlying element. As an example, heres the URL generated for my own Fast Forward ticket. Once were ready to upload, we want to send our image up to wherever were uploading it, which in our case will be Cloudinary. Cloudinary base URL https://res.cloudinary.com, Automatic asset format selection for best browser experience f_auto, Name text color (as a hex code without the #) ffffff, Name text position coordinates x_46,y_239, Name font and size l_text:avenirdemi.otf_48, The same is repeated for the ticket number text, Finally, the URL ends with the name of the image as stored in Cloudinary fastforward2021.png. , Check out the Developer Showcase to see what's being built with Contentful. This will become important in the next couple of steps. The Next Head component imported at the top of the file and rendered inside the Index component will add the meta tags we define inside it to the head of the resulting HTML page. In order to capture a simple example of this workflow, were going to use a Next.js starter project to bootstrap a new React application with an image upload form. So next, we can use the Cloudinary API upload endpoint with fetch by adding: Note: inside of the Cloudinary URL above, be sure to replace Your Cloud Name with your Cloudinary accounts Cloud Name which you can find right in the dashboard. In order to upload as a signed request and fetch our resource, which we'll need later, we need to be able to use our credentials that we set up inside of .env.local. Given that you can use a variety of Google fonts with the Cloudinary API, I wont cover fonts in this post, but you can learn how to upload custom fonts via the Cloudinary media library from this post by Jason Lengstorf. Navigate to the root of your project directory and start the development server: Navigate to https://localhost:3000 in your browser and youll see your fresh Next.js app in action. Now that our endpoints are both set up, we'll be ready to get to work managing these assets in our app! A loader is a function that generates the URLs for your image. If the styling of your image isn't turning out the way you want, consider experimenting with other layout modes. Whether following along with Next.js or not, the code we'll be using should be transferrable to any other node.js-based application. OG meta tags can also be used to customize the appearance of your web pages according to the platform its shared on. .css-1r45sjl{color:var(--chakra-colors-link);-webkit-transition:color 0.15s;transition:color 0.15s;transition-timing-function:var(--chakra-transition-easing-ease-out);}.css-1r45sjl:hover,.css-1r45sjl[data-hover]{color:var(--chakra-colors-teal-600);}See Code on GitHub. If a creature's best food source was 4,000 feet above it, and only rarely fell from that height, how would it evolve to eat that food? We want to be able to transform our image so that we can add some fun backgrounds. Notice that were adding a second URL parameter onto the end of the URL shared which we configured in getSeverSideProps() earlier. Vercel makes it really easy to go live with your Next.js application in just a few seconds. When our images are loaded using URL-based transformations, Cloudinary will go and process that image on the fly, which when first requested, might take a little extra time before getting cached in the CDN. Youll notice were making good use of those event configuration variables we defined earlier. Now before we move on, lets take a quick peek at our new project. Now, Click on the Big Orange Save button on the top right corner of the page to save the configuration. I recommend doing this by setting up a local environment variables file to avoid committing your secret keys to your Git provider or generally storing sensitive data. Can anyone Identify the make, model and year of this car? When dealing with images, often you want to be able to cut out the primary object and change the background, whether that's a pair of shoes you want to show in your store in a more life-like environment or if you simply want to change the background. This will make a new endpoint available at /api/upload that we'll be able to POST our uploads to. You can do the same by running the command: You can then run the project locally by running: Where we can see that we have a file-picker and when selecting an image, we present that image on the page! When fired, fileInput should reference our filepicker input that our visitor used to select an image. But now that we have our background image, we can use it inside of our main image as a transformation. How can I list all collections in the MongoDB shell? If we open up the response, we can even see the URL for our new upload! One of the ways that images most commonly hurt performance is through layout shift, where the image pushes other elements around on the page as it loads in. To protect your application from malicious users, you must define a list of remote hostnames you intend to allow remote access. You can also use asynchronous calls, and tell Cloudinary to do the upload in the background by adding the 'async' parameter and setting it to 'true'. In this post, were going to build a front-end application with Next.js and Cloudinary that creates a personalized image of a ticket based on URL parameters to share on Twitter and LinkedIn. Next.js will automatically determine the width and height of your image based on the imported file. I recently started building Indian Restaurant Billing App as a part of applying my learning's , after completing Advanced React course by Wes Bos. Well use these values later. If youd like to explore the code demonstrated in this post, check out the GitHub repository here (it contains zero CSS so go wild with your designs!). You get the gist. How can I upload files to a server using JSP/Servlet? For examples of the Image component used with the various fill modes, see the Image component example app. On adding a file will call onChange, which calls a method uploadFile. Well also generate a random ticket number and configure the app to behave differently for viewers who arent ticket holders. (Ive truncated the output a little with /* more things happen here */ but what youre looking for is Done!). Making statements based on opinion; back them up with references or personal experience. It includes a variety of built-in performance optimizations to help you achieve good Core Web Vitals. Scientifically plausible way to sink a landmass. For our walkthrough, well use unsigned requests, but the trick is, we need to first configure an Upload Preset, which tells Cloudinary how we want to handle any uploads associated with that particular preset. Read more about getServerSideProps() on the Next.js documentation. Note: this is why we prefixed our Cloud Name with NEXT_PUBLIC earlier! Is there any criminal implication of falsifying documents demanded by a private party? The name parameter in the URL provides a name to embed on the image itself via the Cloudinary API rather than being overlaid via HTML and CSS. You can choose to work on index.js or create a new file in the pages directory. Cloudinary is an image and video asset management service that provides an API for customizing your media on the fly. Why would we want to allow our visitors to upload images? Next, lets set up a few event variables to reuse in a few places to avoid lots of copying and pasting. Note: Remember to replace my-uploads with whatever name you gave your Upload Preset in Cloudinary. To spin up a new Next.js application, run the following command in your terminal: This command creates a new directory that includes all code to get started. To learn more, see our tips on writing great answers. To use this new image we can simply tack it on to our existing image: But once we upload an image and select a background, we'll see our new image! Now, lets create those social share links for your attendees to generate some excitement for your event! For example, Twitter rolled out their own custom implementation of this, built on the OG protocol, and the following code tells Twitter to show the large image web page previews. Big thanks to Jason Lengstorf for this repository, which provided some inspiration and insight to some common gotchas when working with Cloudinary URLs. When you run next dev, you'll see a console warning if the LCP element is an without the priority property. Add text to your images, style it with colors and custom fonts, crop, rotate, resize, recolour, detect faces it's pretty powerful! This isnt critical to our workflow, but its nice for someone to see what theyre uploading before they upload it. The Next.js Image component, next/image, is an extension of the HTML element, evolved for the modern web. If you would like to serve your images directly from a CDN or image server, you can use one of the built-in loaders or write your own with a few lines of JavaScript. OG meta tags are identified in the HTML by an attribute prefixed with og. Now, time to test the code. Technically we don't need to store this value in an environment variable, but since we're storing everything else, it makes it easier to manage from a single location. But once we're ready to go, we're going to use React's useEffect hook and say that whenever we have uploaded data available, we're going to kick off a second request to upload. ), will pull in the image you personalized via Cloudinary via the Open Graph og:image meta tag in your HTML . Some of the optimizations built into the Image component include: To add an image to your application, import the next/image component: Alternatively, you can import next/future/image if you need a component much closer to the native element: Now, you can define the src for your image (either local or remote). Now were ready to upload! You cannot use styled-jsx because it's scoped to the current component. And also the username, which you can find by scrolling up in the page and getting it from Invalidate versioned URLs(highlighted one) or from the upper right corner. Now when we go to use our SDK, we'll have those values available. Where then we'll create an array with them to use in our app. Sign up for your free Contentful account in minutes. Additionally we have a function fire using the onSubmit handler. That somewhere nowadays is cloud. Once the request finishes, it transforms that data to JSON, where it then stores itself inside of the data constant. How can you share that power and give your visitors the ability to upload their own images from your app? In our last step, we uploaded our local image to Cloudinary, but now, we want to do the same thing only this time, remove the background image. This is necessary for the proper rendering of the image element in that layout mode. Discover new insights from the Contentful developer community each month. Instead, I can use an Incoming Transformation to both resize that image to a more reasonable size and optimize that image in a way that wont negatively impact the quality. Now, In the uploadFile method we do the API call to Cloudinary with our username and also the upload_preset name from the earlier screenshots. While you likely want to save the raw, high quality version of that image and apply the transformations on the fly (that way you can make changes later), maybe you want to prevent saving files that are way too big that take up a ton of space or some kind of specific transformation for your applications needs. We can again test this out by adding a console.log: But now, we want to collect all of those files and turn them into FormData, which is what well use to upload our image to Cloudinary. Now our image asset is stored safely in Cloudinary. At the top of pages/index.js import the SDK: We can even set up our existing images to use the SDK to prepare ourselves to change the background. For more information on how to configure these values, refer to the Cloudinary image transformations documentation. You should add the priority property to the image that will be the Largest Contentful Paint (LCP) element for each page. These scores are an important measurement of user experience on your website, and are factored into Google's search rankings. Note: high usage costs money, but the free tier can let you play around with it! For the purpose of this tutorial, well work on index.js and serve the generated tickets under the root URL /. If you're following along, inside of our Starter in pages/index.js we can see this particularly happening in this bit of code: Where we read the value of the file-picker and store the data. To create our Upload Preset, lets first head over to our Cloudinary dashboard and navigate to the Settings section using the little cog in the top navigation bar. Back to the topic, when we give user to upload image to the web-app, we generally need to store the image somewhere. Have you seen Contentfuls event website that generates customized and shareable ticket images that we released for our annual conference Fast Forward? These additional elements are critical to allow the component to prevent layout shifts. Next, lets use this to show a preview of the ticket when attendees share your event on social media. MongoDB relationships: embed or reference? Why does KLM offer this specific combination of flights (GRU -> AMS -> POZ) just on one day when there's a time change? If we scroll down on this page, we should come to a section that shows Upload presets. This is where all of the magic we conjured above comes together. Were going to start off with a new Next.js app using a simple file picker that will help us upload our image to Cloudinary. Two things to note from here, before moving to coding is the Nmae of Upload Preset which is BillingRestro in my case. Head back to your Upload settings and click Edit next to your Upload Preset from Step 1. Weve got three days of events dedicated to those building the next generation of digital experiences, from developers to architects, engineers, creatives and technology enthusiasts alike. Data Imbalance: what would be an ideal number(ratio) of newly added class's data? Depending on your image and how you want it personalized, youll want to play around with the default input parameters of generateImageUrl(), most notably the offset values, colors, font sizes and gravity values. Before we send our data up, we have one more thing, and thats associating our Upload Preset with our form. Note: Many of the styling issues listed below can be solved with next/future/image. Next click on Settings in the top right corner of the dashboard. Finally, lets make sure we update the UI with our new image. Compare my Fast Forward ticket confirmation URL with the link shared on Twitter below. I didnt have access to legitimate ticket numbers for the Fast Forward 2021 event, but I still wanted to include a unique-ish ticket number in the design to make the personalized tickets look more official. In the pop-up give Width as 1000, Height as 1000, Mode as Scale and Format & shape as Auto. Here, were sending a POST request to the Cloudinary API where were passing in our instance of FormData as the body. When uploading directly to Cloudinary, we get a few options for how we manage those uploads. This is the full URL with a name parameter only: https://tickets.contentful.com/fastforward2021?name=Salma, This is the full URL with a name parameter and shared parameter: https://tickets.contentful.com/fastforward2021?name=Salma&shared=true. Find MongoDB records where array field is not empty, Short story about the creation of a spell that creates a copy of a specific woman. Note: if youre using a resize transformation, make sure youre uploading an image larger than that size to see it properly transformed. Note: we're prefixing the Cloud Name with NEXT_PUBLIC so that we can use that value in the client. This prevents visitors to your page from seeing a flash of undefined content or having to show a loading state as the parameter is read by the browser. In the next screen, give a Upload preset name, the Signing Mode to be unsigned and also give a Folder name. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide.

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