David Walsh Blog

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    Script & Style Show: Episode 21: Third Party JavaScript and Web Performance with Charlie Vazac

    On this week's episode: David shrugs aside the scars of the week's DevTools Debugger development to welcome this week's guest:  Charlie Vazac.  Charlie boasts the title of Senior Architect at Akamai and joins David and Todd to talk about third party JavaScript, monkey patching, security, performance...

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    Aliases with JavaScript Destructuring

    Destructuring in JavaScript has totally changed the way JavaScript is written these days;  code is more concise to write but but, from a visual standpoint, the syntax of the language has changed so much.  Any good developer knows, however, that change is the constant we live...

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    Object.freeze: Immutable Objects

    One of my favorite part of JavaScript has always been mutability of objects.  I loved that MooTools and likewise frameworks could modify native prototypes to enhance them with functionality we knew the language need; in fact, I credit MooTools with pushing the web forward. There are cases...

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    Popular Web Tools and Services Among Designers & Developers

    Today we will present you the most popular 30 web tools and services among designers and developers. We handpicked solutions that are offering the best functionalities, support, and pricing on the market. You will find probably the best logo design creating software, the very well-known Hotjar...

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    Twilio: the Ultimate Communication Tool

    My favorite part of the mobile revolution was the explosion of communication tools.  I grew up chatting on AOL Instant Messenger, MSN Messenger, and other desktop messaging tools, so when mobile phones took on text messaging, I was hyped for a new generation of mobile...

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    Repeat Bash Prompts

    I'm sure you wont be surprised when I tell you it's my job to automate things in our my household.  My wife is tech savvy but she relies on me to make tech matters easy for everyone; I guess it's flattering that she trusts me to do...

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    Slides Review: Create Awesome Animated Websites

    Many of the impressive product websites I see these days are single-page sites with elegant animations and responsive elements;  responsive images, responsive font-sizes, and responsive backgrounds.  Whenever I see these sites I wonder how these sites were made, and what CSS units and JavaScript magic...

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    Array and Boolean

    One of the annoyances of old-school JavaScript was side effects; then Array.prototype got methods like filter, map, and forEach so we didn't need to burn variables before looping over values.  I can't explain how happy I am that the JavaScript language continues to evolve. Every once in a...

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    Open Multiple Firefox Tabs from Command Line

    Now that I work on Firefox Developer Tools, I'm really starting to learn some of the tricks of building, debugging, and launching Firefox.  Once I start using Firefox at a developer level each day, the more I become amazed at how configurable and easy to work...

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    Responsive IFRAMEs

    Responsive web design revolutionized the web and spurred a movement away from native apps to web apps easily customizable for a mobile environment.  We use media queries and non-pixel-based dimensions to make responsive design easier; in fact, img { max-width: 100% } is one of my favorite...

Popular Features

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    How to Create a RetroPie on Raspberry Pi – Graphical Guide

    Today we get to play amazing games on our super powered game consoles, PCs, VR headsets, and even mobile devices.  While I enjoy playing new games these days, I do long for the retro gaming systems I had when I was a kid: the original Nintendo...

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    Conquering Impostor Syndrome

    Two years ago I documented my struggles with Imposter Syndrome and the response was immense.  I received messages of support and commiseration from new web developers, veteran engineers, and even persons of all experience levels in other professions.  I've even caught myself reading the post...

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    Being a Dev Dad

    I get asked loads of questions every day but I'm always surprised that they're rarely questions about code or even tech -- many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes...

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    JavaScript Promise API

    While synchronous code is easier to follow and debug, async is generally better for performance and flexibility. Why "hold up the show" when you can trigger numerous requests at once and then handle them when each is ready?  Promises are becoming a big part of the JavaScript world...

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    7 Essential JavaScript Functions

    I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent.  Times have changed but there are still a few functions each developer should...

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    I’m an Impostor

    This is the hardest thing I've ever had to write, much less admit to myself.  I've written resignation letters from jobs I've loved, I've ended relationships, I've failed at a host of tasks, and let myself down in my life.  All of those feelings were very...

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    fetch API

    One of the worst kept secrets about AJAX on the web is that the underlying API for it, XMLHttpRequest, wasn't really made for what we've been using it for.  We've done well to create elegant APIs around XHR but we know we can do better.  Our effort to...