David Walsh Blog Note

David Walsh Blog

David Walsh's blog is a website where he shares his experiences, knowledge, and updates related to technology, programming, and personal life. It includes articles on various programming languages and tools, updates on different projects, tutorials, and more. The blog has been active for many years and serves as a resource for developers and programmers across the globe.

Thread Of Notes

JavaScript SpeechSynthesis API

As the web continues to be the medium for all users, standards bodies need to continue to provide new APIs to enrich user experience and accessibility. One underused API for unsighted users is speechSynthesis, an API to programmatically direct the browser to audibly speak any arbitrary string. The Code You can direct the browser to […]

Fix “This video format is not supported” on YouTube TV

Setting up a new computer is bliss — no old, unused apps and the machine performs much better than the previous. Unfortunately, you may encounter new problems based on the new hardware. One such issue I encountered with my new MacBook was a “This video format is not supported” message when I went to YouTube […]
CdXz5zHNQW_qvgBfl62ja.png

How to Download a YouTube Video or Channel

The ability to download media on the internet almost feels like a lost art. When I was in my teens, piracy of mp3s, movies, and just about everything else via torrents and apps like Kazaa, LimeWire, Napster, etc. was in full swing. These days sites use blob URLs and other means to prevent downloads. Luckily […]

How to Add a Header to a curl Request

curl is one of those great utilities that’s been around seemingly forever and has endless use cases. These days I find myself using curl to batch download files and test APIs. Sometimes my testing leads me to using different HTTP headers in my requests. To add a header to a curl request, use the -H […]

Case Insensitive CSS Attribute Selector

CSS selectors never cease to amaze me in how powerful they can be in matching complex patterns. Most of that flexibility is in parent/child/sibling relationships, very seldomly in value matching. Consider my surprise when I learned that CSS allows matching attribute values regardless off case! Adding a {space}i to the attribute selector brackets will make […]

How to Set Date Time from Mac Command Line

Working on a web extension that ships to an app store and isn’t immediately modifiable, like a website, can be difficult. Since you cannot immediately deploy updates, you sometimes need to bake in hardcoded date-based logic. Testing future dates can be difficult if you don’t know how to quickly change the date on your local […]

How to Retrieve WiFi Password on Windows

Remembering the WiFi password when on a guest network is never easy. Even worse is when it’s no longer posted and someone else is asking you for it. Luckily there’s a built in Windows command to recover the password of a given WiFi network. The Shell Code Open cmd and execute the following command: netsh […]

How to Fix: Windows WASD Keys Reversed with Arrow Keys

This past weekend I had the opportunity to be what every father wants, if only for a moment: the “cool dad”. My wife was out of town and my youngest son wanted to play PUBG. I caved in, taught him the basic FPS key binds, and he was having a great time. While he was […]

HTML popover Attribute

Modals have been an important part of websites for two decades. Stacking contents and using fetch to accomplish tasks are a great way to improve UX on both desktop and mobile. Unfortunately most developers don’t know that the HTML and JavaScript specs have implemented a native modal system via the popover attribute — let’s check […]

I’m So Old: Web Edition

Time can be a funny thing. I still remember discovering HTML, CSS, and JavaScript coding. I still remember my first college programming course. I still remember my first day at my first coding job, then my first day at my second coding job, and then my first day at Mozilla. I still remember my first […]

Detect Caps Lock with JavaScript

Anyone is capable of having their caps lock key on at any given time without realizing so. Users can easily spot unwanted caps lock when typing in most inputs, but when using a password input, the problem isn’t so obvious. That leads to the user’s password being incorrect, which is an annoyance. Ideally developers could […]

How to Override width and height HTML attributes with CSS

One of the HTML elements that frequently comes into collision with CSS is the img element. As we learned in Request Metrics’ Fixing Cumulative Layout Shift Problems on DavidWalshBlog article, providing image dimensions within the image tag will help to improve your website’s score. But in a world where responsive design is king, we need […]

Fixing Cumulative Layout Shift Problems on DavidWalshBlog

Over 50 thousand developers visit DavidWalshBlog every month from around the world to learn JavaScript tricks and fix problems in their code. Unfortunately, some of them have a slow experience on the site. David tracks the performance of his Core Web Vitals and overall performance with Request Metrics. Recently, we noticed that his CLS performance […]

Date.now()

Ask any software engineer and they’ll tell you that coding date logic can be a nightmare. Developers need to consider timezones, weird date defaults, and platform-specific date formats. The easiest way to work with dates is to reduce the date to the most simple format possible — usually a timestamp. To get the immediate time […]

Extract a Number from a String with JavaScript

User input from HTML form fields is generally provided to JavaScript as a string. We’ve lived with that fact for decades but sometimes developers need to extract numbers from that string. There are multiple ways to get those numbers but let’s rely on regular expressions to extract those numbers! To employ a regular expression to […]

Thoughts on Streaming Services: 2024 Edition

Streaming services have revolutionized content delivery, sending linear media companies into a panic as they watch traditional cable services decay. “Cutting the cord” is a common practice these days, but the streaming landscape isn’t perfect. We’re a decade into streaming so I wanted to share my thoughts on the state of new media: first impressions, […]

AutoGrow Textareas with CSS

As the demands of the web change and developers experiment with different user experiences, the need for more native language improvements expands. Our presentation layer, CSS, has done incredibly well in improving capabilities, even if sometimes too slow. The need for native support for automatically expanding textarea elements has been long known…and it’s finally here! […]

How to Play Grand Poo World 3

The underground world of creating and streaming Super Mario World-based ROM hacks continues to gain popularity. This popularity is a tribute to the creativity of gamers and the quality of the original 30 year old video game’s mechanics. Over the past decade, incredible ROM hacks like Grand Poo World 1 and 2, Invictus, and Dram […]

How to Get the Current Branch Name with git

Most developers spoil themselves with fun command line utilities to make their work easier and more efficient. One such command line helper allows developers to always show the git branch in the command line. How can you get the current branch? With this handy snippet: git branch --show-current It’s great to keep this snippet around […]

AutoSave with VSCode

Visual Studio Code has taken the crown of most used text editor, at least in JavaScript spheres. VSCode is fast, feature-filled, and supports thousands of plugins to boost productivity. Developers can also tweak hundreds of settings to enrich functionality. One such feature is the autoSave feature. To autoSave files with VS Code, you can add […]

How to Detect Failed Requests via Web Extensions

One of the best things that ever happened to t he user experience of the web has been web extensions. Browsers are powerful but extensions bring a new level of functionality. Whether it’s crypto wallets, media players, or other popular plugins, web extensions have become essential to every day tasks. Working on MetaMask, I am […]

Welcome to the New LimeWire: AI Media Generation (Sponsored)

LimeWire was a staple of my youth. LimeWire was software that allowed users to share any type of file during the revolutionary days of file sharing. Fast forward to today and LimeWire is back, again as revolutionary software, but this time in the field of AI content publishing. From creating images to music and video, […]