DEV Community

JavaScript

Once relegated to the browser as one of the 3 core technologies of the web, JavaScript can now be found almost anywhere you find code. JavaScript developers move fast and push software development forward; they can be as opinionated as the frameworks they use, so let's keep it clean here and make it a place to learn from each other!

Posts

đź‘‹ Sign in for the ability to sort posts by relevant, latest, or top.
Which image does Next.js Image fetch? Compare src, srcset, and currentSrc in a browser

Which image does Next.js Image fetch? Compare src, srcset, and currentSrc in a browser

Comments 1
4 min read
I Built 806 Free CBT Tools in Vanilla JavaScript — Here's Why

I Built 806 Free CBT Tools in Vanilla JavaScript — Here's Why

Comments
3 min read
The HTML File Wasn't a Failed Download. The Error Message Assumed It Was.

The HTML File Wasn't a Failed Download. The Error Message Assumed It Was.

Comments
4 min read
Building Responsive Web Experiences: Lessons from Redesigning E-Commerce & Gaming Platforms

Building Responsive Web Experiences: Lessons from Redesigning E-Commerce & Gaming Platforms

Comments
1 min read
Stripe Checkout Session expires_at: 24h Default Holds Seats

Stripe Checkout Session expires_at: 24h Default Holds Seats

Comments 2
3 min read
TypeScript `keyof typeof` in 2026: Practical Patterns for Enum-Like Objects and Config Maps

TypeScript `keyof typeof` in 2026: Practical Patterns for Enum-Like Objects and Config Maps

Comments
11 min read
Firefox Extensions That Use AI Locally: No Cloud, No Account, No Data Sharing

Firefox Extensions That Use AI Locally: No Cloud, No Account, No Data Sharing

Comments
2 min read
Firefox RSS Reader: Get News Headlines on Your New Tab Without a Subscription

Firefox RSS Reader: Get News Headlines on Your New Tab Without a Subscription

Comments
2 min read
Firefox WebExtensions API: What Makes a Browser Extension Tick

Firefox WebExtensions API: What Makes a Browser Extension Tick

Comments
2 min read
Firefox Personal Knowledge Management: Building a Browser-Native PKM Setup

Firefox Personal Knowledge Management: Building a Browser-Native PKM Setup

Comments
2 min read
Firefox for Data Scientists: Browser Extensions for Research and Analysis

Firefox for Data Scientists: Browser Extensions for Research and Analysis

Comments
2 min read
Firefox for Healthcare Workers: Browser Extensions That Keep Patient Data Local

Firefox for Healthcare Workers: Browser Extensions That Keep Patient Data Local

Comments
2 min read
Firefox for Legal Professionals: Browser Extensions That Process Data Locally

Firefox for Legal Professionals: Browser Extensions That Process Data Locally

Comments
2 min read
Stale JavaScript in Google’s Render? Check the Asset Fingerprint

Stale JavaScript in Google’s Render? Check the Asset Fingerprint

2
Comments 1
5 min read
I wrote a VS Code extension because my settings.json kept getting shuffled

I wrote a VS Code extension because my settings.json kept getting shuffled

Comments
6 min read
đź‘‹ Sign in for the ability to sort posts by relevant, latest, or top.