This article explores five powerful JavaScript 2021 enhancements—including logical assignment operators, replaceAll, numeric separators, Promise.any, and WeakRef/Finalizers—explaining their syntax, behavior, and practical code examples to help developers write cleaner, more efficient code.
The article reviews the Stage‑4 proposals slated for ES2021, explaining logical assignment operators, efficient string replacement techniques, the new Promise.any method, WeakRef usage, and readable numeric separators, each illustrated with clear JavaScript code examples.
This article introduces five new ES2021 JavaScript features—including replaceAll, Promise.any, logical assignment operators, numeric separators, and WeakRefs—explaining their behavior, usage examples, and browser support so developers can quickly adopt them.
This article reviews the latest TC39 proposals advancing from Stage 3 to Stage 4—including Promise.any, AggregateError, WeakRefs, FinalizationRegistry, logical assignment operators, numeric literal separators, Intl.ListFormat, Intl.DateTimeFormat styles, iterator.item, Intl.Segmenter, Record & Tuple, JSON.parse source‑text access, await extensions, Array.prototype.unique, and resizable array buffers—explaining their goals, required thresholds, and providing concrete code examples.
This article previews the upcoming ES2021 JavaScript features that have reached Stage 4, including String.prototype.replaceAll, Promise.any, logical assignment operators, numeric separators, WeakRef, and new Intl APIs, providing code examples and notes on current browser support.
