javascript

11 Posts

JavaScript is a free, high-level programming language created by Brendan Eich in 1995 and standardized as ECMAScript. Originally built to add interactivity to web pages, it now runs everywhere: browsers, servers, mobile apps, and desktop software. It's dynamically typed and supports functional, object-oriented, and event-driven styles. Yearly updates have added features like async/await, modules, and optional chaining. Its quirks around type coercion and equality still trip up newcomers.

Why your Tailwind classes aren't showing up

The class is right there in the DOM and nothing happens. Here's why Tailwind never saw it, and four fixes that actually hold up in production.

Why Tailwind Won't Generate the Class You Just Wrote

The class is sitting right there in your JSX and the browser still ignores it. Here's why Tailwind's scanner can't see it, and how to fix it for good.

ReferenceError: Cannot Access 'x' Before Initialization

Why JavaScript throws Cannot access 'x' before initialization, what V8's temporal dead zone actually does, and how to fix and prevent it for good.

Why Node says ERR_MODULE_NOT_FOUND when the file exists

Node's ERR_MODULE_NOT_FOUND keeps firing when the file is right there. Every real cause, from missing extensions to broken package exports, plus the fix for each one.

Too many re-renders: the fix that actually sticks

The exact line React throws before the tab freezes Uncaught Error: Too many re-renders. React limits the number of

ERR_REQUIRE_ASYNC_MODULE: why require() won't wait for you

Node throws ERR_REQUIRE_ASYNC_MODULE when require() hits an ESM module with top-level await in its graph. Here's the whole mechanism and the fix that holds up.

Too many re-renders: why React limits you to 25

Uncaught Error: Too many re-renders. Every real cause, the exact React 19.3 stack trace, and why the retry loop stops at 25 passes.

TypeError: "x" is not a function — Causes and Fixes

TypeError: x is not a function fires when you call a value that isn't callable — a typo, a lost `this`, or the wrong shape from an API. Here's how to fix each case.

Node.js ERR_MODULE_NOT_FOUND: Causes and Fixes

Node throws Error [ERR_MODULE_NOT_FOUND] when an ESM import can't be resolved — usually a missing file extension or directory index. Here's the exact fix.

Cannot Read Properties of Undefined: Causes & Fixes

TypeError: Cannot read properties of undefined (reading 'x') explained across Chrome, Firefox, Safari, and Node — with the real fix, not just a null check.