JSJ 336: “The Origin of ESLint” with Nicholas Zakas
JavaScript Jabber23 Okt 2018

JSJ 336: “The Origin of ESLint” with Nicholas Zakas

Panel: Special Guests: Nicholas Zakas In this episode, the panel talks with Nicholas Zakas who writes on his site, Human Who Codes. He is the creator of ESLint, also the author of several books, and he blogs, too. He was employed through Box and today he talks about ESLint in full detail! Check it out! Show Topics:0:05 – Advertisement: KENDO UI 0:37 – Hello! The panel is...(Chuck introduces everyone).1:04 – Nicholas who are you?1:17 – Nicholas: Yeah it’s been about 5 years and then you invited me again, but I couldn’t come on to talk about ESLint back then. That’s probably what people know me most for at this point. I created ESLint and I kicked that off and now a great team of people is maintaining it.1:58 – Chuck: What is it?2:04 – It’s a Linter for JavaScript. It falls into the same category as JSLint. The purpose of ESLint is to help you find problems with your code. It has grown quite a bit since I’ve created it. It can help with bugs and enforcing style guides and other things.2:53 – Where did it come from?2:57 – Guest: The idea popped into my head when I worked at Pop. One of my teammates was working on a bug and at that time we were using...Nothing was working and after investigating someone had written a JavaScript code that was using a native code to make an Ajax request. It wasn’t the best practice for the company at the time. For whatever reason the person was unaware of that. When using that native XML...there was a little bit of trickiness to it because it was a wrapper around the...We used a library to work around those situations and add a line (a Linter) for all JavaScript files. It was a text file and when you tried to render code through the process it would run and run the normal expression and it would fail if any of the...matched.I am not comfortable using normal expressions to write code for this. You could be matching in side of a string and it’s not a good way to be checking code for problems. I wanted to find a better way.6:04 – Why did you choose to create a product vs. using other options out there?6:15 – Guest: Both of those weren’t around. JSHint was pretty much the defector tool that everyone was using. My first thought was if JSHint could help with this problem?I went back to look at JSHint and I saw that on their roadmap you could create your own rules, and I thought that’s what we need. Why would I build something new? I didn’t see anything on GitHub and didn’t see the status of that. I wanted to see what the plan was, and they weren’t going to get to it. I said that I really needed this tool and I thought it would be helpful to others, too.8:04 – My history was only back when it was customizable.8:13 – Aimee: It’s interesting to see that they are basing it on regular expressions.8:32 – Guest: Interesting thing at Box was that there was...I am not sure but one of the engineers at Box wrote...9:03 – Aimee: I was going to ask in your opinion what do you think ES Lint is the standard now?9:16 – Guest: How easy it is to plug things in. That was always my goal because I wanted the tool not to be boxed in – in anyway.The guest continues to talk about how pluggable ESLint is and the other features of this tool.13:41 – One thing I like about ESLint is that it can be an educational tool for a team. Did you see that being an educational tool?14:24 – Guest: How do you start introducing new things to a team that is running at full capacity? That is something that I’ve wondered throughout my career. As a result of that, I found that a new team there were some problems I the code base that were really hard to get resolved, because when one person recognizes it there isn’t a god way to share that information within a team in a non-confrontational way. It’s better to get angry at a tool rather than a person.Guest goes into what this can teach people.18:07 – Panelist: I am not surprised. Is there a best practice to get a team to start with ESLint?Do you get the whole team in a room and show them the options or take the best guess and turn it on?18:34 – Guest: The thing I recommend is that first and foremost get ESLint in your system with zero rules on. It starts that mindset into your development process. We can do something to automatically check...Get Syntax checking and you will se improvements on the number of bugs that are getting out of production. I recommend using the default the ESLint configuration. This has all of the things that we have found that are most likely errors and runtime errors vs. syntax errors. You can go through with those and sometimes it is easier to run that check with...Using those ESLint rules will clean up a lot of problems that you didn’t know you had with your code. There are too many problems with those rules. I recommend instead of turning them off then put the severity to warning and not error. That is something we started with in the beginning. We turned on as many rules as we could and it drove people crazy. They didn’t feel like when they were committing to a file why should I be...The idea with the different scenario levels you don’t’ want to turn off rules so people don’t know there is a problem. There can be a rule on so people will know that there is a problem, but...Doing that alone will give you a lot of benefit in using ESLint. How do you decide as a team on the rules that are maybe not for finding errors but for stylistic in error? Do we use four spaces, semi-colons, etc. To figure that out I am a big component on finding a pre-existing style guide and adapting it. Get everyone to agree.There is no right or wrong when it comes to stylistic preferences. It really is just getting everyone to do the same thing. I think it was Crawford that said: Whether you drive on the right side of the left side of the road – it doesn’t matter as long as everyone is dong the same thing. I agree with that and it applies to style guides. It can get heated but for the best thing for the team is stick with a guide and work together.24:36 – Aimee: I can go through the options to pick one of the style guides out there and then it will automatically create my configuration for me is helpful. Question: If you had to pick 2 or 3 rules that you are super helpful what would they be?25:30 – Guest: To touch briefly on indentation. Whether you like four spaces or whether you are wild and like tabs, I think the indent rule is very helpful. Just for wiping out and eliminating that discussion through your team. Have your editor setup however they want but on the pre-hook...But my favorite rules I tend to lean towards the ones that saved me.The Guest goes through his favorite rules with ESLint. Check it out!26:51 – Guest mentions his second favorite rule, here!28:24 – Guest mentions his third favorite rule, here!29:03 – Guest mentions the rule that makes him giggle a lot, here!30:07 – Advertisement – Sentry! 31:22 – What is your take on running Fix? Does it make sense to run Fix?32:00 – Guest: It depends and the idea behind Fix is the idea of doing a one time (at the start) fix everything that it can find wrong b/c I don’t want to do it by hand. It morphed into a more of a tool that people are using all the time. I too have mixed feelings about it. I think the greatest value you get out of Fix is that when you first install it or when you enable a new rule. I think in those situations you get a lot of value out of Fix. I think that when people were getting aggressive with their code styles it took us down a path where we...As a pre-commit hook it could be to fix things and part of the built system you wouldn’t want...People are probably wondering: Why doesn’t ESLint doesn’t fix all the time?It can be a team decision: do you want to run Fix at the point that the developer is writing the code, do you want to use Fix as running it as a build when you are bundling? It really seems more of a personal preference. I am on the fence about it. Even though I am leaning more towards...35:16 – Do you run Premier?35:20 – Guest: No I don’t. I don’t have anything against Premier but I think Prettier uses a very interesting space.37:50 – Chuck: What is next for ESLint and what is next for you?37:55 – Guest: Well, to be honest I am not sure what is next for ESLint. I haven’t been involved with keeping it maintained for the last few years. I do help out with feedback with decisions. But in general the ESLint the direction is that let’s add tings that help people avoid language hazards and make sure that ESLint is still pluggable. Lastly, that we will be there to help people and the community. There is this virtuosic cycle and tools like Babble and then tools like ESLint introducing rules adapting new rules and featur

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Optimizing SQL and ORM Practices for High-Performance Applications - JSJ 650

Optimizing SQL and ORM Practices for High-Performance Applications - JSJ 650

In today's episode, Charles, Steve, and AJ, are joined by back-end engineer and team lead at Homebound, Stephen Haberman. We delve into the fascinating world of SQL c and its revolutionary approach to managing SQL queries with dedicated SQL files, delivering benefits such as reduced typing errors and pre-deployment checks. Stephen also walks us through the advantages and limitations of ORMs versus query builders like Prisma and Drizzle, sharing insights into Joyce ORM's unique philosophy and simplified CRUD operations.They explore the intricacies of Domain Driven Design (DDD), its emphasis on ubiquitous language, and how it shapes business logic and storage management. AJ contributes by discussing the potential of SQL c and Slonik for dynamic query building. Additionally, they discuss Steven's innovative work with GraphFileWorker and GrafAST, highlighting the performance improvements in GraphQL backends. Whether you're intrigued by the technicalities of ORMs, the evolution of database tools, or just love a good anecdote, this episode packed with technical insights and lively discussions is one you won't want to miss. Join them on this journey into the world of database management and development!SocialsLinkedIn: Stephen HabermanPicks AJ - TypeScript to JSDocAJ - MySQL to TypeScriptAJ - sqlcAJ - Slonik (Node + Postgres)AJ - SwiftUI EssentialsAJ - Introduction to SwiftUI AJ - Trump, but not saying dumb thingsCharles - Biblios | Board GameCharles - FreeStyle Libre 3 System | Continuous Glucose MonitoringStephen - Grafast | GrafastBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

24 Sep 20241h 31min

Mentorship in Tech: Balancing Professionalism and Friendship for Maximum Growth and Accountability - JSJ 649

Mentorship in Tech: Balancing Professionalism and Friendship for Maximum Growth and Accountability - JSJ 649

They dive deep into the world of mentorship, personal growth, and problem-solving with our special guests, Joao and Manny, alongside our insightful panelists, AJ and Charles.In this episode, they explore the transformative power of weekly accountability meetings (WAM), where tasks are committed and followed up with a yes or no, no excuses allowed. Joao and Manny share their journey of mentorship that crossed borders, forging a strong bond through adversity and mutual respect. We'll also delve into how their dynamic friendship amplifies professional standards, and the importance of balancing personal and professional relationships.We discuss the profound impacts of structured problem-solving methods, specifically George Polya's renowned four-step process. Joao and Manny highlight how this systematic approach has refined their coding skills and overall problem-solving abilities. Alongside, we touch upon the fascinating intersection of human learning and AI, emphasizing the unique capacity humans have for generalizing new problems from limited data.In addition, our speakers will share their roadmap for continuous learning, curriculum development, and practical exercises—highlighting tools like Trello for task management and Anki for reinforcing learning. AJ O'Neil offers his unique perspective on the talent it takes to thrive in programming and how personal enjoyment is crucial for sustained success.Later, we'll transition to our Picks section, where AJ, Charles, and the guests share their latest recommendations, from essential productivity tools and engaging books to top-notch apps and board games.Finally, we'll wrap up with some valuable insights on time management, consistent study habits, and the importance of finding a mentor who truly cares about your growth. Whether you're a seasoned developer or just starting out, this episode is packed with practical advice and inspiring stories that you won't want to miss. So, tune in for all this and more on Top End Devs!PicksAJ - Apple EarpodsAJ - SwiftUICharles - Biblios | Board GameCharles - FreeStyle Libre 3 SystemManny - Jaco: The Extraordinary and Tragic Life of Jaco PastoriusManny - Baldur's Gate 3 on SteamBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

17 Sep 20241h 19min

Unpacking Deno 2: Code Stability, Free Speech, and more - JSJ 648

Unpacking Deno 2: Code Stability, Free Speech, and more - JSJ 648

Today, Charles, Dan, AJ, and Steve dive into a range of fascinating discussions. Joining this episode is special guest, Ryan Dahl, the visionary creator behind Node.js and Deno.In this episode, they traverse an eclectic mix of topics, from humorous offbeat news and dad jokes to in-depth tech discussions. They explore the complexities and legalities surrounding free speech, offering diverse perspectives on its implications in the modern digital landscape.But the heart of our discussion is Ryan Dahl's exploration of Deno 2, the latest evolution in JavaScript's runtime environment. You'll hear about its distinctive features, including the revolutionary JSR project, and how it aims to simplify and secure modern JavaScript development, addressing challenges and limitations found in Node.js. They also discuss the intricacies of TypeScript support, Deno’s security model, and the future potential of JavaScript in data science.Join them for a lively conversation packed with insights, technical deep-dives, and plenty of humor. Whether you're a seasoned developer or just starting your coding journey, this episode is sure to offer valuable takeaways and an entertaining ride through the world of modern web development.Sponsors Wix StudioSocialsLinkedIn: Ryan DahlTwitter: @deno_landDenoPicksAJ - SwiftAJ - DenoCharles - Challengers! | Board GameRyan - GrainBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

10 Sep 20241h 34min

Opinionated Core Web Vitals - JSJ 647

Opinionated Core Web Vitals - JSJ 647

Dan Shappir takes the lead this week to discuss Core Web Vitals and how Google is pushing the web to be faster.He leads Chuck, Aimee, and AJ through the ways that developers can measure and improve the performance of websites based on the statistics specified by Google as components of Google rankings.Sponsors Wix StudioLinksWeb VitalsPicksAimee- GitHub | treosh/lighthouse-ci-actionAimee- GitHub | GoogleChrome/lighthouse-ciAJ- Classless CSSAJ- One FinanceAJ- JCS - Criminal Psychology - YouTubeAJ- Auth Library Live StreamCharles- Atlas Shrugged Charles- Dev Influencers | Devchat.tvDan- Core Web Vitals Technology ReportDan- Math Has a Fatal Flaw - YouTubeBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

3 Sep 20241h 10min

Beyond JavaScript: Master TypeScript at Scale at SquiggleConf - JSJ 646

Beyond JavaScript: Master TypeScript at Scale at SquiggleConf - JSJ 646

Dan together with Josh Goldberg, a prominent open-source maintainer and author of "Learning TypeScript, dive into the world of TypeScript and JavaScript with a special focus on the upcoming Squiggleconf. In this episode, they'll detail the conference format, including its dedicated days for talks and workshops, and highlight the impressive lineup of speakers who will cover topics like ASTs, TypeScript at scale, and essential documentation practices.Josh also shares insights into the evolution and practical application of TypeScript ESLint. Expect a deep dive into TypeScript's latest features, such as generics and specific lint rules that enhance code quality and developer experience.SocialsLinkedIn: ‌Josh ‌GoldbergPicksDan - Dan's favorite standalone fantasy booksDan - Despicable Me and MinionsJosh - NeuromancerJosh - WitcherBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

28 Aug 20241h 10min

Deep Dive into Metrics and Monitoring with Prometheus and Grafana - JSJ 645

Deep Dive into Metrics and Monitoring with Prometheus and Grafana - JSJ 645

Dive into a fascinating discussion blending the worlds of literature, gaming, and tech. In this episode, Chuck and Dan explore the intriguing connections between The Hobbit and The Lord of the Rings, including an extraordinary tale about Israeli pilots translating The Hobbit during wartime. They share insights into Guy Gavriel Kaye’s standalone novel Tigana, inspired by Renaissance Italy, and discuss the complexities and strategies of board games like Monopoly and Letters from Whitechapel.But that’s not all. The episode takes a technical turn as the speakers delve into the dynamic world of application monitoring with Prometheus. They unpack the mechanics of event loop lag, heap usage, and GC storms, and share how Prometheus's query language (PromQL) and integration with Grafana can proactively manage and solve performance issues. Hear about real-time alerting, sophisticated querying, and the practical applications of these tools in companies like Next Insurance and Sisense.This episode is packed with information - from managing performance metrics and alerting systems to insightful discussions on favorite standalone fantasy novels and the productivity hacks that keep our hosts on top of their game. So, sit back and join us for an engaging and informative session on Top End Devs!SocialsLinkedIn: Chuck WoodLinkedIn: Dan ShappirPicksCharles - Letters from Whitechapel | Board GameCharles - TrainingPeaks | Empower Your TrainingBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

20 Aug 20241h 25min

Crafting Code and Community: AI, LeetCode, and Meetups - JSJ 644

Crafting Code and Community: AI, LeetCode, and Meetups - JSJ 644

In this episode, they dive deep into the world of coding, meetups, and the evolving landscape of technical interviews. Join them as they explore the fascinating use of OpenAI's technology for coding assistance, the challenges of setting up impactful meetups, and the intricacies of mastering LeetCode problems.Our experts share invaluable insights—from leveraging AI tools like GPT to generate code effectively, to the essential strategies for problem-solving during high-pressure technical interviews. They also touch on the importance of deliberate practice, group support, and finding the right mindset for tackling coding challenges. Plus, hear personal stories about the benefits of taking breaks, the role of LeetCode in honing coding skills, and the shift in interview styles towards speed and pattern recognition.Sponsors Wix StudioSocialsAnatoliy D. ZaslavskiyLinksNYC LeetCode SquadPicksAJ - Yumi and the Nightmare Painter by Brandon SandersonAJ - The ChosenAJ - Beauty & The BeatAnatoliy - Authentic relatingAnatoliy - Neurodivergent Guide to the WorkplaceCharles - Challengers! | Board GameSteve - Myspace celebrates its 21st birthday. Do we still need it?Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

13 Aug 20241h 9min

Overcoming JavaScript Load Issues: Import Maps and Performance Enhancements - JSJ 643

Overcoming JavaScript Load Issues: Import Maps and Performance Enhancements - JSJ 643

In this episode, they dive deep into the intricate world of JavaScript loading and web performance. Join the panel with insightful discussions led by Dan, Charles, Steve, and special guest Yoav Weiss—an expert with extensive experience in web performance from his time at Google, Akamai, and Shopify.They explore the latest initiatives aimed at improving ES modules, import maps, and the challenges faced with script loading, especially when dealing with web workers. They uncover the critical role of sub-resource integrity, the successful integration of integrity support in Chrome and Safari, and the urgent need for advanced import map solutions for large applications.They also delve into the nuts and bolts of optimizing web performance, including the impact of script execution on browser responsiveness, bundling techniques, and innovative strategies for managing resource download priorities. Tune in to hear about the latest developments, engage with provocative questions, and discover ways you can contribute to the ongoing work of the W3C web performance working group. Plus, stay for heartfelt moments, personal anecdotes, and practical recommendations from the speakers.  SponsorsWix StudioSocialsLinkedIn: Yoav WeissPicksAJ - Jason Bourne 5-part TrilogyAJ - Crucial MX500 has dethroned SP as my pick for best value server SSDCharles - Imaginiff | Board GameCharles - A Quiet Place: Day One (2024)Steve - How Does OpenAI Survive?Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

8 Aug 20241h 35min

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