Mastering JS@mastering_js

Bite sized JavaScript tutorials for busy developers Follow us on Substack: masteringjs.substack.com

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masteringjs.io
Joined May 2021
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🆕 The `afterEach()` Hook in Mocha masteringjs.io/tutorials/moc… #JavaScript #CodeNewbie

The `afterEach()` Hook in Mocha

Here's how Mocha's afterEach() hook works.

masteringjs.io
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JavaScript dates are notoriously tricky to work with. But once you've taken the time to really understand dates, you'll realize that you usually don't need moment, date-fns, etc. For example, add 30 days to a date 👉 masteringjs.io/tutorials/fun… #JavaScript #CodeNewbie
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Our number one tip for better tech writing: stop using the word "it" Don't say "its failing", at least say "the test is failing" Don't say "its undefined", say "v is undefined" or "the return value is undefined" "It" is usually too vague #JavaScript #CodeNewbie #TechWriting
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🆕 Check if a Date is Valid in JavaScript masteringjs.io/tutorials/fun… #JavaScript #CodeNewbie
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🆕 Encode base64 in JavaScript masteringjs.io/tutorials/fun… #JavaScript #CodeNewbie

Encode base64 in JavaScript

Here's how you can use the btoa() function in JavaScript to convert strings to base64. Also describes how to convert strings to base64 using Node.js buffers.

masteringjs.io
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Assertions in Mocha tutorial 👉 masteringjs.io/tutorials/moc… Spoiler alert: we advise using Node's assert module. Never saw the need for a fancypants assertion framework like Chai #JavaScript #CodeNewbie
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🆕 Assertions in Mocha masteringjs.io/tutorials/moc… #JavaScript #CodeNewbie
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🆕 Using `it.skip()` in Mocha masteringjs.io/tutorials/moc… #JavaScript #CodeNewbie
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🆕 Working with Timezones using date-fns and date-fns-tz masteringjs.io/tutorials/dat… #JavaScript #CodeNewbie

Working with Timezones using date-fns and date-fns-tz

Here's how you can use date-fns-tz to work with timezones, and alternatives for working with timezones in vanilla JS.

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🆕 The `before()` Hook in Mocha masteringjs.io/tutorials/moc… #JavaScript #CodeNewbie
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We love Mocha. The best JavaScript test runner out there: 🪨 Stable 💪 Reliable ⏩ Blazing fast Check out our tutorials on Mocha: masteringjs.io/mocha #JavaScript #CodeNewbie
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2 ways to run just a single test in Mocha 👉 masteringjs.io/tutorials/moc… #JavaScript #CodeNewbie

Run Just a Single Test in Mocha

Here's two ways you can run just one test out of a Mocha test suite.

masteringjs.io
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New Substack issue is out! Building a Hot Dog/Not Hot Dog Image Classifier in JavaScript masteringjs.substack.com/p/b… #JavaScript #100DaysOfCode
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🆕 The `beforeEach()` Hook in Mocha masteringjs.io/tutorials/moc… #CodeNewbie #JavaScript
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🆕 Check if URL Contains a String masteringjs.io/tutorials/fun… #JavaScript #CodeNewbie
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🆕 How To Fix "__dirname is not defined" Error in Node.js masteringjs.io/tutorials/nod… #JavaScript #CodeNewbie
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No, you don't need date libraries in JavaScript. Not moment, date-fns, luxon. Not even Temporal. Seize the Date For example, here's how you can increment months 👉 masteringjs.io/tutorials/fun… #JavaScript #CodeNewbie

JavaScript Add Month to Date

Here's how you can add a month to a JavaScript Date without using external libraries. We also have examples using date-fns or Luxon.

masteringjs.io
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🆕 JavaScript Add Month to Date: masteringjs.io/tutorials/fun… #JavaScript #CodeNewbie
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🆕 JavaScript Add Days to Date masteringjs.io/tutorials/fun… #NodeJS #JavaScript #CodeNewbie
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New Substack post is out: What Are Good Side Hustles for Web Developers? Revisiting a topic we covered back on our old Revue mailing list. Big change: we now recommend micro SaaS if you're a dev that has marketing chops or wants to learn masteringjs.substack.com/p/w…
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