Modern JavaScript: ES Modules, Iterators, and Weak Collections
Modern applications rely on ECMAScript enhancements that provide clean abstractions and high-performance data structures. Interviewers frequently probe candidate knowledge of ES modules live bindings, generator pause/resume lifecycles, and memory-safe WeakMap caching.
Explore how iterables and iterators power the `for...of` loop and spread operators, how Symbols enable metaprogramming via well-known symbols, and how WeakSets allow object tracking without interfering with garbage collection.
Interview Modules (7)
1. JavaScript Modules (ESM vs CommonJS)
Interactive ReadyWhat is printed to the console when the following code executes, and how does the live binding model of ES Mod...
2. Iterators & Generators
Interactive ReadyWhat is logged to the console when the generator is driven step-by-step with next(), and how do yield argument...
3. Symbols & Metaprogramming
Interactive ReadyWhat is logged to the console when local vs global symbols are compared, an object with a symbol key and Symbo...
4. Maps, Sets, WeakMap & WeakSet
Interactive ReadyWhat is logged to the console when the following Map and Set operations execute, and how do object reference i...
5. JavaScript Classes & Inheritance
Interactive ReadyWhat is logged to the console when the following class hierarchy executes, and how do static inheritance, priv...
6. Proxy and Reflect Metaprogramming
Interactive ReadyWhat is logged to the console when the following Proxy and Reflect operations execute across get, set, has, an...
7. Tagged Templates & Frontend Security
Interactive ReadyWhat is logged to the console when the following safeHtml tagged template function processes an untrusted user...