JavaScript Tutorials

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    How to Detect When a Sticky Element Gets Pinned

    The need for position: sticky was around for years before it was implemented natively, and I can boast that I implemented it with JavaScript and scroll events for ages. Eventually we got position: sticky, and it works well from a visual perspective, but I wondered how...

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    How to Create an Async Function via “new Function”

    One thing I love about JavaScript is that there are many ways to accomplish the same task, one such example being creating functions. There are several patterns for functions; one of the last you see used is the new Function method:What if you want...

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    5 Awesome JavaScript Promise Tricks

    The Promise API changed the game in JavaScript. We went from abusing setTimeouts and settling for synchronous operations to doing everything possible to leverage this new async API. Let's check out a handful of awesome Promise API tricks!Cancel a fetch RequestOne problem we...

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    Logical Assignment Operators

    I love JavaScript, it's my favorite programming language, but I love dipping into other languages because they offer a new perspective on coding paradigms. There've been syntax additions to JavaScript that I've seen I found interesting (think ?? in optional chaining) and...

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    Match Emojis with Regular Expressions

    When experimenting with unicode property escapes, to identify accented letters in strings, it reminded me of a question I had a few years ago: what is the best way to identify and then replace emojis in a string? I first noticed this practice...

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    Simple Node.js Proxy

    When I wanted to refresh my React.js skills, I quickly moved to create a dashboard of cryptocurrencies, their prices, and and other aspects of digital value. Getting rolling with React.js is a breeze -- create-react-app {name} and you're off and running. Getting the API...

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    Match Accented Letters with Regular Expressions

    Regular expressions are used for a variety of tasks but the one I see most often is input validation. Names, dates, numbers...we tend to use regular expressions for everything, even when we probably shouldn't.The most common syntax for checking alphabetic characters is A-z but what if...

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    Promise.allSettled

    The Promise object has many useful functions like all, resolve, reject, and race -- stuff we use all the time. One function that many don't know about is Promise.allSettled, a function that fires when all promises in an array are settled, regardless of whether...

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    Binding Arguments with Bind

    One of my favorite and most essential Function method is bind, a function we added to MooTools when it wasn't featured in the JavaScript language itself. We often think of using bind to simply bind a method's call to its host object, but did you...

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    JavaScript in SVGs

    SVGs are such an amazing tool for creating custom fonts, animations, size-reduced graphics, and more. They're part HTML, part image, and all awesome. Many websites have moved toward SVG instead of JPG, GIF, and PNG due to the flexibility that SVG provides.Whats one example...