Introducing humanfs (formerly fsx): A modern filesystem API for JavaScript - Human Who Codes
The JavaScript APIs we have today are so much better than those we had even a decade ago. Consider the transition for XMLHttpRequest to fetch(): the developer experience is dramatically better, allowing us to write more succinct, functional code that accomplishes the same thing. The introduction of promises for asynchronous programming allowed this change, along with a series of other changes that
The inception of ESLint - Human Who Codes
If you’re like me, you probably use a lot of open source tools every day without thinking about how they got started. Few projects share the “why” of their creation: the actual problem they were trying to solve and when they first came across that problem. You can, of course, benefit from open source projects without understanding their origin story, but I always find it interesting to hear about
How to talk to your company about sponsoring an open source project - Human Who Codes
Open source sustainability is a topic that is just starting to get the attention that it deserves. So much of the technology sector is run on software that can be used for free without any further obligation. However, as companies profit from using this software for free, the maintainers of the software often struggle to find enough time to work on the software while making enough money to survive
Introducing Env: a better way to read environment variables in JavaScript - Human Who Codes
If you write server-side JavaScript, chances are you’ve need to read information from environment variables. It’s considered a best practice to share sensitive information, such as access tokens, inside of environment variables to keep them secure. However, the way environment variables are read from JavaScript is error-prone in subtle ways that might take you hours to figure out. When an error oc
Create TypeScript declarations from JavaScript and JSDoc - Human Who Codes
For a variety of reasons, I prefer to write my code in vanilla JavaScript with JSDoc comments rather than writing in TypeScript. Today’s smart code editors, like Visual Studio Code, are able to read type information from JSDoc and provide Intellisense options as you code. However, those consuming your code may not get the same benefit unless you include a TypeScript declaration file along with the
How to safely use GitHub Actions in organizations - Human Who Codes
GitHub Actions1 are programs designed to run inside of workflows2, triggered by specific events inside a GitHub repository. To date, people use GitHub Actions to do things like run continuous integration (CI) tests, publish releases, respond to issues, and more. Because the workflows are executed inside a fresh virtual machine that is deleted after the workflow completes, there isn’t much risk of
Why I've stopped exporting defaults from my JavaScript modules - Human Who Codes
Last week, I tweeted something that got quite a few surprising responses: In 2019, one of the things I’m going to do is stop exporting things as default from my CommonJS/ES6 modules. Importing a default export has grown to feel like a guessing game where I have a 50/50 chance of being wrong each time. Is it a class? Is it a function? — Nicholas C. Zakas (@slicknet) January 12, 2019 {: .twitter-twe
Computer science in JavaScript: Linked list - Human Who Codes
Back in 2009, I challenged myself to write one blog post per week for the entire year. I had read that the best way to gain more traffic to a blog was to post consistently. One post per week seemed like a realistic goal due to all the article ideas I had but it turned out I was well short of 52 ideas. I dug through some half-written chapters what would eventually become Professional JavaScript and
My (somewhat) complete salary history as a software engineer - Human Who Codes
Job Details The data alone doesn’t really tell the full story, so here are the details around each position. I’ve also included how I came to work at each company, as I think it’s important to recognize blind resume submissions from having contacts as a company. In 2006, I moved from Massachusetts to California. This undoubtedly affected my pay positively due to the higher cost of living in Califo
The ECMAScript 2016 change you probably don't know - NCZOnline
Compared to ECMAScript 6 (also known as ECMAScript 2015), ECMAScript 2016 was a minor update to the language specification for JavaScript. This was due to the decision that ECMAScript editions would now move to a yearly release cycle, effectively just a snapshot of all the features that were ready. As such, most resources list only two significant changes in ECMAScript 2016: The addition of the ex
ES6 module loading: More complicated than you think - NCZOnline
One of the most long-awaited features of ECMAScript 6 is the formal definition of modules as part of the language. For years, JavaScript developers have struggled with organizing their code and needing to decide between alternate ad-hoc module formats like RequireJS, AMD, and CommonJS. Formally defining modules as part of JavaScript will eliminate a lot of heartache in the future, but right now, t
ECMAScript 6 destructuring gotcha - Human Who Codes
Posted at October 20, 2015 by Nicholas C. Zakas Tags: ECMAScript 6, Destructuring With all of the new syntax in ECMAScript 6, you’re bound to periodically find something that is confusing (likely as you’re hunting down an error). Recently, I’ve seen an uptick in the reporting of a specific type of error as it relates to destructuring assignment[1] using object patterns. Destructuring basics Before
Creating defensive objects with ES6 proxies - Human Who Codes
Posted at April 22, 2014 by Nicholas C. Zakas Tags: ECMAScript 6, JavaScript, Proxies This past week I spent an hour debugging an issue that I ultimately tracked down to a silly problem: the property I was referencing didn’t exist on the given object. I had typed request.code and it should have been request.query.code. After sternly lecturing myself for not noticing earlier, a pit formed in my sto
Announcing Understanding ECMAScript 6 - Human Who Codes
Posted at March 26, 2014 by Nicholas C. Zakas Tags: Books, ECMAScript 6, JavaScript, Writing For almost two years, I’ve been keeping notes on the side about ECMAScript 6 features. Some of those notes have made it into blog posts while others have languished on my hard drive waiting to be used for something. My intent was to compile all of these notes into a book at some point in time, and with the
Now shipping: Principles of Object-Oriented JavaScript - Human Who Codes
Posted at February 25, 2014 by Nicholas C. Zakas Tags: Books, JavaScript, Writing I’m very proud to announce that Principles of Object-Oriented JavaScript is now shipping! For frequent readers, this book is the print version of my self-published ebook, The Principles of Object-Oriented Programming in JavaScript, which I published at the beginning of 2013. Birth of an ebook The whole process began
Private instance members with weakmaps in JavaScript - Human Who Codes
Posted at January 21, 2014 by Nicholas C. Zakas Tags: ECMAScript 6, JavaScript, WeakMap Last week I came across an article1 by Nick Fitzgerald in which he described an approach for creating private instance members for JavaScript types using ECMAScript 6 weakmaps. To be completely honest, I’ve never been a big proponent of weakmaps – I thought there was a loss of fuss about nothing and that there
Now available: ESLint v0.1.0 - Human Who Codes
Posted at November 4, 2013 by Nicholas C. Zakas Tags: Code Quality, ESLint, JSHint, JSLint It was four months ago when I announced the start of the ESLint project. My initial goal was to create a fully-pluggable JavaScript code quality tool where\ every single rule was a plugin. Though I like and appreciate JSHint, the inability to be able to define my own rules alongside the existing ones was kee
Understanding ECMAScript 6 arrow functions - Human Who Codes
Posted at September 10, 2013 by Nicholas C. Zakas Tags: ECMAScript 6, Functions, JavaScript One of the most interesting new parts of ECMAScript 6 are arrow functions. Arrow functions are, as the name suggests, functions defined with a new syntax that uses an “arrow” (=>) as part of the syntax. However, arrow functions behave differently than traditional JavaScript functions in a number of importan
Introducing ESLint - Human Who Codes
Posted at July 16, 2013 by Nicholas C. Zakas Tags: ESLint, JavaScript, JSHint, JSLint, Linting A long time ago, JSLint was the state of the art in JavaScript linting technology. Then JSHint came along as a fork and took over due to increased flexibility. I welcomed JSHint as my linter of choice and used it everywhere, happily submitting patches and customizing which rules to apply based on the pro
The case for setImmediate() - Human Who Codes
Posted at July 9, 2013 by Nicholas C. Zakas Tags: Performance, process.nextTick, setImmediate, setTimeout One of my favorite new APIs that has been beaten about is setImmediate(). While I’ll concede the naming is completely wrong, the functionality is completely awesome. The basic idea is to tell the browser that you want some JavaScript code executed after the last UI task in the event loop compl
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