React
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How to Detect Long Press Gestures in JavaScript Events in React
By Colby Fayock
Interactions on the web are traditionally all about clicks, but then we had swipes, other gestures, and another option on click-like events: long press. How can we implement a long press interaction in our React apps without requiring native mobile tools? What is a long press? When dealing with a variety of devices, a click...
How to Save State to LocalStorage & Persist on Refresh with React.js
React’s state APIs give developers great ways to maintain personalization or the items you have in your shopping cart, but once you refresh the page, they’re gone! How can we can we store those values for a customer’s session locally without having to worry about a database? What is React State? React is a popular...
How to Add Webcam Photo Filters & Effects in React with Cloudinary
Apps like Instagram, Snapchat, and TikTok made adding fun filters to your photos easy. But what if you wanted filters in your own app? We can use Cloudinary with pre-built and custom filters on top of using existing device’s webcams to liven up the experience for our customers. What are photo filters? If you’ve used...
How to Trigger a Function when Scrolling to an Element in React Intersection Observer
Whether we’re trying to delay loading heavy resources or trying to add some delight to our app experience, being able to trigger functionality after a visitor scrolls to a certain point is handy tool in our belt. But what do you track and how do you track it? How can we detect if someone scrolled...
How to Generate Personalized Social Media Cards for Landing Pages with Next.js & Cloudinary
You’ve likely seen conference websites or other apps that dynamically create images and social cards based on your registration. It’s a great way to personalize an experience for an individual, especially when sharing online. What’s behind the magic of the dynamic social cards and how can we build landing pages with our own dynamic images...
How to List & Display Cloudinary Image Resources in a Gallery with Next.js & React
There are variety of services that let us upload an image and see the result, but what if we want to view all of the images we’ve uploaded over time or provide a custom dashboard for managing those the images? Managing images on the web Whether you’re a developer uploading images for your website or...
How to Personalize Content & Jamstack Web Experiences with Uniform & Next.js
Building apps on the Jamstack gives us fast and reliable apps, but just because our front end may be static, doesn’t mean it can’t be dynamic. How can we use Uniform to give the control of content back to those who actually manage the content and add a personalization layer to our Jamstack apps with...
How to Programmatically Upload Images to Cloudinary in React & Next.js
Image and asset managers like Cloudinary give you a lot of power in being able to automatically optimize and transform images, but when building an app, you can’t expect each user to upload manually in your dashboard. How can you share that power and give your visitors the ability to upload their own images from...
How to Create Thumbnail Images Using Face Detection with Cloudinary
Creating a gallery of images on a page can be trivial, but what if you don’t have control over how the images are created? Ending up with different sizes and formats can turn a good looking gallery into a mess. Instead, we can use Cloudinary image transformations and Face Detection to make sure we’re always...
How to Create CSS Custom Properties That Dynamically Update with React & JavaScript
CSS variables have been around with tools like Sass, but only recently have they become native to CSS. Now that we have them available right in our browsers, how can we use JavaScript and tools like React to dynamically update the values? What are CSS Custom Properties? tl;dr they’re variables! They’re the CSS Spec’s way...