Javascript terms

4 terms of 1444 total

⚡ 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.

Sort A → Z Recently Added Recently Updated Difficulty Most Viewed Most Rated Most Shared

Level All Beginner Intermediate Advanced

✕ Clear A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Memory Management in JavaScript

JavaScript uses automatic garbage collection — the engine reclaims memory when objects are no longer reachable. Memory leaks occur when references are unintentionally retained, preventing collection.

4w ago javascript intermediate

MutationObserver API HTML5

MutationObserver watches DOM tree changes — attribute changes, child additions/removals, text content changes — without polling or event listener on each node.

2mo ago javascript intermediate

Memory Leaks — Closures, Detached DOM ES2015

JavaScript memory leaks occur when references are accidentally retained — common causes: closures holding large objects, detached DOM nodes, forgotten event listeners, and growing Maps/Sets.

2mo ago javascript advanced

Map, Set, WeakMap & WeakSet ES2015

ES6 collections that improve on plain objects for key-value storage (Map), unique value lists (Set), and memory-safe object associations (WeakMap, WeakSet).

2mo ago javascript intermediate