Javascript terms
From DOM manipulation to async superpowers
JavaScript has evolved from a scripting curiosity into a full-stack language powering browsers, servers, and everything in between. This category covers the language core — closures, prototypes, async patterns, the event loop, modern ES2024+ features — as well as runtime behaviour that trips up developers at every experience level. Understanding JavaScript deeply means fewer bugs and more confident code.
ES Modules (ESM) ES2015
The official JavaScript module system — import and export statements enable static dependency graphs, tree-shaking, and native browser module loading without a bundler.
4w ago
javascript intermediate
Error.cause — Error Chaining ES2022
ES2022 added a cause option to the Error constructor — 'new Error('message', { cause: originalError })' — enabling proper error chaining where a high-level error wraps its underlying cause, preserving the full error context across abstraction layers.
2mo ago
javascript beginner
EventSource API — Server-Sent Events (Client Side) HTML5
EventSource is the browser API for consuming Server-Sent Events (SSE) — a one-directional server-to-client stream over HTTP that automatically reconnects, ideal for live feeds, notifications, and streaming LLM responses.
2mo ago
javascript intermediate
Event Loop Blocking — Long Tasks ES5
JavaScript is single-threaded — synchronous code that runs >50ms blocks the event loop, freezing UI and delaying I/O callbacks. Break long tasks into chunks.
2mo ago
javascript intermediate
ES6 Class Syntax ES2015
ES6 classes are syntactic sugar over prototypal inheritance — the keywords mirror PHP but the underlying mechanism is different.
2mo ago
javascript intermediate
ES Modules (import/export) ES2015
The standard JavaScript module system — static imports/exports enable tree-shaking, top-level await, and strict mode by default.
2mo ago
javascript beginner
Event Delegation ES5 A pattern that attaches a single event listener to a parent element instead of many listeners to children — using event bubbling to handle events from dynamically added children.
2mo ago
javascript intermediate