21 posts tagged with "React"

I'm a big fan of the Material-UI (MUI) library treeview component. I recently needed to do some customisation of the nodes in the treeview component I was rendering. The application I was working on acquired data for each node in our treeview component asynchronously. I wanted to show a loader for each node that was still loading.

Achieving this required passing data to individual nodes in the treeview component. This appears to not be officially supported by the MUI treeview component. However, it is possible and this post will show you how to do it.

The comment on this GitHub issue suggests that this will be directly supported in MUI v6. Until that time, you'll have to slightly hack the component to achieve this.

I've written previously about how to check children and uncheck parents in the MUI treeview component. This post builds on that one. But, you need not be using multiselect / checkboxes etc to use the approach in this post. It applies generally to usage of the treeview component.

I've written previously about combining Web Workers and Comlink. I recently found myself needing to use Web Workers again. As I picked them up this time I found myself making some different choices, now I was working in a codebase that used Vite to build. I ended up using TanStack Query in combination with my Web Workers and Comlink. It was a really good fit and this post will show you how to use Web Workers with Comlink and TanStack Query.

Every now and then, I need to use a treeview component in a React application. The Material-UI (MUI) library provides a treeview component that is very useful. However, some of the default behaviours of the component differ from that which you typically find in a treeview component. I'm speaking, of course, about node selection. I'm used to a treeview component that, when a parent node is selected, auto selects the child nodes underneath. And by turn, when nodes are deselected, the parent nodes get deselected.

This post documents how to implement this behaviour with the MUI treeview component.

Since initially writing this, I've learned that it is likely that the kind of behaviour I'm hand-rolling here, will natively land in the component. So, all being well, what follows should become unnecessary! To track native support watch this GitHub issue.

I love the Material-UI (MUI) library for React. Hand on heart, I'm not very good at making UIs that are attractive. So I always grab for something to paper over the cracks. MUI is awesome for that.

One of the components that I use frequently is the tabs component. However, I've found that it can be a little tricky to use in a "text-first" way, that also remains strongly typed. This post documents how to do just that!

A new feature arrives with TypeScript 5.1, it is described as "Decoupled Type-Checking Between JSX Elements and JSX Tag Types".

It's all about handing control of JSX type definitions to libraries. With this feature, libraries can control what types are used for JSX elements. Why does this matter? Great question! Until version 5.1, TypeScript did an imperfect job of representing what is possible with JSX. This feature allows libraries to do a better job of that, and we'll look into it in this post.

It's probably worth saying, that this is a complicated feature. If you don't understand it (and as the author of this post I'll confess that I had to work quite hard to understand it), that is okay. This is a low level feature that is only likely to be used by library / type definition authors. It's a primitive that will unlock possibilites for people writing JSX - but it's something that people will mainly feel the benefit of, without directly doing anything themselves, or necessarily noticing that things have changed for the better.

The React useState hook is a great way to persist state inside the context of a component in React. This post demonstrates a simple React hook that stores state in the URL querystring, building on top of React Routers useSearchParams hook.

The upgrade of the React type definitions to support React 18 involved some significant breaking changes. This post digs into that and examines what the upgrade path looks like.

People being able to discover your website when they search is important. This post is about how you can add structured data to a site. Adding structured data will help search engines like Google understand your content, and get it in front of more eyeballs. We'll illustrate this by making a simple React app which incorporates structured data.

React 18 alpha has been released; but can we use it with TypeScript? The answer is "yes", but you need to do a couple of things to make that happen. This post will show you what to do.

react-query has a weakly typed hook named useQueries. It's possible to turn that into a strong typed hook; this post shows you how.

When an application loads data, typically relatively few HTTP requests will be made. For example, if we imagine we're making a student administration application, then a "view" screen might make a single HTTP request to load that student's data before displaying it.

The tremendous Tanner Linsley recently released react-virtual. react-virtual provides "hooks for virtualizing scrollable elements in React".

JavaScript is famously single threaded. However, if you're developing for the web, you may well know that this is not quite accurate. There are Web Workers:

A worker is an object created using a constructor (e.g. Worker()) that runs a named JavaScript file — this file contains the code that will run in the worker thread; workers run in another global context that is different from the current window.

If you're using Vite to build your React app, you may prefer to read this post.

Progressive Web Apps are a (terribly named) wonderful idea. You can build an app once using web technologies which serves all devices and form factors. It can be accessible over the web, but also surface on the home screen of your Android / iOS device. That app can work offline, have a splash screen when it launches and have notifications too.

This is going out to all those people using react-select with 1000+ items to render. To those people typing into the select and saying out loud "it's so laggy.... This can't be... It's 2019... I mean, right?" To the people who read this GitHub issue top to bottom 30 times and still came back unsure of what to do. This is for you.

Love me some Font Awesome. Absolutely wonderful. However, I came a cropper when following the instructions on using the all new Font Awesome 5 with React. The instructions for standard icons work fine. But if you want to use brand icons then this does not help you out much. There's 2 problems:

I was recently checking out a very good post which explained how to upload images using React Dropzone and SuperAgent to Cloudinary.

Most applications I write have some need for authentication and perhaps authorisation too. In fact, most apps most people write fall into that bracket. Here's the thing: Auth done well is a *big* chunk of work. And the minute you start thinking about that you almost invariably lose focus on the thing you actually want to build and ship.

Everyone loves curry don't they? I don't know about you but I'm going for one on Friday.

I wrote a while ago about how I was using some different tools in a current project: