Playwright now offers a UI mode

#​631 — March 24, 2023

Read on the Web

JavaScript Weekly

Speeding Up the JavaScript Ecosystem: npm Scripts — The latest in what has been a fascinating series on finding ‘low hanging fruit’ when it comes to performance in the JavaScript world. The author explains it best himself:

“‘npm scripts’ are executed by JavaScript developers … all the time. Despite their high usage they are not particularly well optimized and add about 400ms of overhead. In this article we were able to bring that down to ~22ms.”
What Marvin does here is a valuable skill for all developers to pick up, and you can enjoy more by going back to the start.

Marvin Hagemeister

Playwright v1.32 – Now with UI Mode — The popular Web testing and automation framework is taking more steps toward ground currently served by tools like Cypress by offering a ‘UI mode’ that lets you explore, run and debug tests in a UI environment, complete with watch mode. ▶️ This video provides a good introduction.

Microsoft

A Grid Component with All the Features & Great Performance — Try our powerful JS data grid component which lets you edit, sort, group and filter datasets with fantastic performance. Includes a TreeGrid, API docs and plenty of demos. Seamless integration with React, Angular & Vue apps.

Bryntum sponsor

Why We Added package.json Support to Deno — Deno shares some provenance with Node.js but till recently it hadn’t focused on supporting Node features like npm modules. But with Node and npm compatibility beginning to improve, the team has faced questions about the runtime’s priorities. Ryan Dahl explains more about their thinking here.

Ryan Dahl

???? In other Deno news, Deno 1.32 has been released with… improved package.json support, and more.

How to Start a React Project in 2023 — There are lots of ways, but this well-regarded author explains the pros and cons of a few approaches, and gives you a few options targeting specific use cases you might have.

Robin Wieruch

IN BRIEF:

GitHub had to update its RSA SSH host key today so you may see security related warnings when pushing and cloning. It’s easy to fix, but check the new fingerprint matches – it’s for your own security.

The New Stack caught up with Svelte’s Rich Harris on SvelteKit and what’s coming for Svelte 4.

The React team shared some cutting edge updates on what they’re working on including React Server Components and an optimizing compiler.

If you were experiencing errors on the official Node site last week, here’s the (detailed) post mortem of why. Config errors and inappropriate caching, mostly.

✨ Did you know there’s a market in fake GitHub stars? Some developers analyzed some repos to learn more about it.

???? Congratulations to Lea Verou on her TC39 appointment. Her efforts to push the Web forward are legendary. Prism is one project you may be aware of.

Make your opinions known on what should be in the next version of Vite.

RELEASES:

Docusaurus 2.4
↳ Easy to maintain documentation site generator.

Puppeteer 19.8
↳ Headless Chrome Node.js API.

Neutralinojs 4.11
↳ Lightweight cross-platform desktop app framework.

Qwik 0.23

???? Articles & Tutorials

Buying a Hard-to-Get Bicycle using Playwright — An unusual use case for JavaScript, Playwright, and GitHub Actions, but Maciek managed to buy his bike.

Maciek Palmowski

Snyk Top 10: JavaScript OSS Vulnerabilities — Dive into the most prevalent critical and high open source vulnerabilities found by Snyk scans of JavaScript apps in 2022.

Snyk sponsor

The ‘End’ of Front-End Development? — A recent narrative doing the rounds suggests that large language models like GPT-4 (or even tools like Copilot X) could soon put some developers out of a job — however, Josh is “optimistic about what these AI advancements mean for the future of software development”.

Josh W. Comeau

In related news, Eric Elliott put ChatGPT through its paces to see if it would make for a good JavaScript tutor. It did well — though with mixed results.

Migrating from ts-node to Bun — A look at adopting performance-oriented Bun when you’re used to using TypeScript with Node.js. John runs us through porting a console app from the ts-node approach over to Bun — “a pretty easy process,” he says.

John Reilly

▶  A Pinia Crash Course for BeginnersPinia is a store / state management solution for Vue that does believe in pineapple on pizza.

Alexander Gekov

A Practical Guide to Getting Started with Astro — An extensive walkthrough of Astro that covers all the topics you’ll need to get you started.

Mojtaba Seyedi

???? Test Website Speed Continuously and Rank Higher In Google — You need a fast website to make users happy and meet Google’s Core Web Vitals metrics. Test and optimize with DebugBear.

DebugBear sponsor

Automatic npm Publishing with GitHub Actions and Granular Tokens

Tim Perry

Make Sure You Do This Before Switching to Signals in Angular

Jordan Powell

Six CSS Snippets Every Developer Should Know

Adam Argyle (Google)

???? Code & Tools

trace.cafe: Easy Webperf Trace Sharing — A quick way to share a performance profile saved from your DevTools, available for up to 90 days with the DevTools perf panel embedded (see example).

paul irish

VueUse: A Collection of Vue Composition Utilities — With over 200 functions targeting both Vue 2 and 3, there’ll be something in this suite of Composition API-based utility functions for you, whether it’s working with state, browser capabilities, animations, Electron, Firebase, and more.

Anthony Fu

Don’t Let Your Issue Tracker Be a Four-Letter Word. Use Shortcut

Shortcut (formerly Clubhouse.io) sponsor

OTPAuth: One Time Password (HOTP/TOTP) Library — When you log in to a site that uses 2FA and you’re asked for some digits from an authentication app, that’s probably a Time-based One-Time Password (or TOTP). This library for Node, Deno, Bun and the browser lets you work with TOTPs and HOTPs from JS.

Héctor Molinero Fernández

Recharts 2.5: Chart Library Built with React and D3 — Easy to deploy with declarative components, native SVG support, and lightweight dependency on D3. Line, bar, scatter, composed, pie, and radar charts are offered. There are lots of examples, complete with code.

recharts

DOCX 8.0: Generate Word .docx Files from JavaScript — The code to lay out documents is verbose but there’s a lot of functionality. Here’s a CodePen example and release notesGitHub repo.

Dolan Miu

SvHighlight: Code Syntax Highlighter for Svelte — Powered by Highlight.js, it includes a blurring feature to focus attention on specific areas of code and you an customize it with Tailwind. Try the interactive examples to see the effect.

SvHighlight

eslint-formatter-pretty 5.0: Pretty ESLint Formatter — Nicer output than the default. Sort results by severity. Get stylized inline code blocks, and more.

Sindre Sorhus

AWS JWT Verify: Verify JWTs Signed by Amazon Cognito — In both Node.js and the browser.

Amazon Web Services

???? Jobs

Software Engineer (Backend) — Join our “kick ass” team. Our software team operates from 17 countries and we’re always looking for more exceptional engineers.

Sticker Mule

Find JavaScript Jobs with Hired — Hired makes job hunting easy-instead of chasing recruiters, companies approach you with salary details up front. Create a free profile now.

Hired

????‍???? Got a job listing to share? Here’s how.

melonJS 15.0
↳ Mature HTML5 game engine.

Marked 4.3
↳ Markdown parser and compiler. (Demo.)

v8go 0.9
↳ Execute JavaScript from Go(lang).

Million 2.1
↳ Fast Virtual DOM to make React faster.

Partytown 0.7.6
↳ Take third-party scripts off the main thread.

???? Bonus Item

Make Bookmarklets — Create and test bookmarklets directly in the browser. Makes an irritating task slightly easier if you need to do it.

Cullan Luther

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Is React a Framework? Software Engineer Answering

By definition – React is one of the most popular JavaScript UI libraries nowadays. It comes in second place after jQuery among all web frameworks! React’s popularity has grown rapidly thanks to a simple and declarative API that allows you to build high-performance applications, and that momentum keeps growing. Still, there is often discussion and questioning that React is a framework or library.

Firstly, let’s look what the differents between framework and library? 

The framework belongs to the main() function. It executes some functions, e.g. controlling a collection of windows on the screen. The framework can, in principle, work even if you have not set it up in any way. It does something, e.g. it places an empty window with default widgets. The framework defines the general nature of the program, and your code provides a specific setting. These settings can be very significant, as both a word processor and a spreadsheet can be created using the same framework.

The library is the set of tools used by your code. Your code belongs to the main() and provides the overall structure of the program. A library performs some specific task, such as sending traffic over a network, drawing charts, or something else. The library can do big things, like draw a view of a three-dimensional space full of objects, but only after you tell it about those objects.

The framework can call your code, which in turn calls the library. But your code never calls the framework, except perhaps for system() or exec() functions.

But, is React a Framework? 

We asked our Software Engineers Team for their opinion and they were split into two parts: some maintain the view that React is a library, and others assign it as a Framework. Here are the most outstanding opinions:

From my point of view, React is not a framework, it’s just a library with no specific requirements for project structure. It’s about describing the abstractions of your application, logic, routing, data exchange, and so on. And React simplifies the work with this data, and optimizes the work with it

Anton M. – Software Engineer at Flatlogic.com

From my point of view, React is not a framework, it’s just a library with no specific requirements for project structure. It’s about describing the abstractions of your application, logic, routing, data exchange, and so on. And React simplifies the work with this data, and optimizes the work with it

I know that react calls itself a “library”, and a lot of developers prefer to react to the home page with the title “library”. However, I think that React is more like a framework now, with different targets like web, react native, etc. And the foundation of React is JSX, which is crucial for proper developer experience, and requires a build step, so you can’t just slap a bunch of JSX files into a browser and call it a day. Nowadays when you say “I built this app with React” you don’t mean that you used it on one page or as a modern jquery alternative. You mean that you built everything around react, with its ecosystem, its best practices, etc. And with all those points in mind, I’d rather call react the framework, than a library

Viktor S. – Staff Engineer at Flatlogic.com

We also conducted the research among others software engineers and would like to share with you the most impressive arguments on this point. 

So, is React a Framework or a Library?

React is a Library

React is a JavaScript library for building user interfaces. It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile applications.

Now Why Library, not a Framework?

different definitions for library and framework:

a framework is a software where you plug your code into
a library is a software that you plug into your code

In terms of this definition, React is a framework. But some people, especially in the frontend world, say a framework has to bring stuff like routers and/or widgets, etc. 

So Angular, and ExtJS are frameworks, but React isn’t, because it only gives you the means to build components and render them into the DOM.

Let’s make it simple, in React we have to include packages for everything it’s not necessary but yes we can add them, thus React is a Library but if we are not given an option to do so with our code then that’s a framework like Angular and Vue.

React is a library because it’s only supposed to deal with the view part of the eco-system, and you can integrate it easily in any project you’re working on currently, it’s something like jQuery, it only helps you with organizing your views into reusable components, of course, the performance is one of the best things about React, especially with the new Fiber algorithm, things will be faster seeing the scheduler mechanism, unlike Angular, it’s a framework that gives you everything you need, most of the things are already built-in, for React you need to create your own/or grab some modules from npm to add extra functionality as need per your project.

It depends on how you use it. If you’re writing a small program and you structure your program around working with React, you are probably thinking of React as a framework.

If you have a big program and you use React as a small part of it just for handling output, then you’re probably thinking of React as a library.

If your program is 90% user interface, and not only your program structure but your data structures are shaped to fit the React system, then you may even think of React as a language. Hey, if TypeScript can be a language, why not React?

React is a library, cause it has mostly evolved into a vast ecosystem that is barely distinguishable from a framework. A framework protects the edges, whereas a library provides a tool for doing certain tasks. React handles exactly one task: abstracted Web Components. It offers an internal state, lifecycles, and external properties, as well as a renderer for a browser or comparable environment through ReactDOM – and nothing more.

This has a few advantages: it is smaller than a full-featured framework, has fewer opinions on how to address problems, and so provides more options.

I’d say React is a library posing as a framework. It feels like working in a framework (esp. with JSX, though using that is optional), but under the hood, it is just a library. This definition is quite good:

a framework is software that you plug your code into (e.g. you work “inside” it).
a library is software that you plug into your code (e.g. you “hand-off” certain tasks to it, or build “on top” of it).

React feels like the first, but is the second. The attached video compares React and Angular and hints at the distinction. Since React treats your code as a black box, you can push the data-binding concerns out to the edges of your system, to be “handed off” to React (i.e. how you would use a library). Angular, on the other hand, forces you to work “inside” their “scopes” using their “directives” to handle data-binding. In Angular, you are passing your data through scopes that observe your data model. You are always at the mercy of whichever directives they are building into their framework scaffolding. You are also working “inside” HTML (JS-in-HTML), with all the constraints that impose (giving more of a framework feeling). But with React, you have less of that feeling, since you have freedom (full power of JS), and can build “on top” of React (HTML/JSX-in-JS). This is good since JS is inherently more powerful than HTML.

React is a Framework

React is a framework. Honestly caring about the difference between a library and a framework is a bit pedantic, so I’d say you can call it either. Having said that, my definitions of the two words are that a library is a collection of functions, and a framework is a way of doing things.

By this definition, React is a framework because it forces you to build UI in the React way instead of the Angular, etc. On the other hand, the dash is a perfect example of a library because it’s just a collection of functions, use them however you want.

JavaScript is known for its abundance of new plugins, frameworks, and other things created by its massive community of developers and designers.

You must be wondering what this fact has to do with the React JS framework and other frameworks. The truth is that many of the leading IT firms have already embraced JavaScript and leveraged its benefits.

That should answer the question and not cause any other debates, right? Well, not exactly; the debate over Is React a framework or library? is as strong as ever.

Over the years, developers, software engineers, and developer communities came up with pros and cons related to the status of React as a library or React as a framework. Let’s analyze them together.

React as a library

React can be easily swapped by some other javascript library offering similar functionalities.
React can be easily plugged into an existing technology stack – and that’s the definition of a library.

React as a framework

Related libraries must work in an opinionated way.
Because of its state and lifecycle on the components, you inverted the control to React.

Are you asking why React was designed as a library and not a framework [1] or why it is classified as a library and not a framework [2]?

[1] Why it was built that way. A library is something you can add to an existing project to enhance it. It does not impose any restrictions or conventions on your application design and you can supplement it with other libraries of your choice to flesh out your application. There is also a shorter learning curve (usually) on a library as you can add it incrementally to your project. A framework on the other hand implies structure and convention, you need to follow the conventions of the framework. In many cases a framework limits you to working within these conventions – you cannot (or it is difficult) to mix a framework with other code.

There are use cases for each.

[2] Why it is not classified as a framework. Based on the definition of a framework it does not fit the bill – it is a library that is added to your code – it does not impose structure – beyond the use of the library itself and it can be mixed in with other code.

React does not solve any structural or architectural problems on the app level. It provides us with a set of methods for better (in my opinion) handling of the front-end. I remember when jQuery did that back in the day, and how that started the revolution… React is now doing the same, just better.

Because React is a library eventually we got Flux and Redux. Both of them are handling real-world problems that come alongside Scaling. Mare library does not think about that.

React is a framework because Redux is referencing it as one (Source). Ah, as I started to hope that something in life is going to be easy. With React and Redux there is a clear layer of separation between the view and data. That is why React is not a complete framework to solve the entire problem.

Conclusion

Soft engineers spend a lot of time talking about what React is. The answer is important for any React soft engineer, no matter their skill level. That is because it indicates what they should know and how they should work when developing any React application. Depending on who you are, a beginner or an advanced React soft engineer, I hope this thoughtful research will improve your development process as you build your next React project.

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