ES2026 JavaScript Exploration

This repository explores upcoming JavaScript (ECMAScript 2026) features and practical modernizations.

Feature: Replace Array.prototype.reduce with Math.sumPrecise

This exploration focuses on updating numerical reduction patterns across the codebase by using a precise summation helper instead of raw reduce.

Previously:

const arr = [0.1, 0.2, 0.3];
arr.reduce((a, b) => a + b) // 0.6000000000000001

Now:

Math.sumPrecise([0.1, 0.2, 0.3]) // 0.6

This feature is intended to reduce floating-point rounding errors and improve numeric stability in JavaScript projects.

TypeScript Build Exploration

This repository includes a TypeScript build exploration under ts-build/.

The sample project demonstrates:

• TypeScript decorators with experimentalDecorators
• Bundling with esbuild
• Serving the output with a simple local development server

Run the demo from ts-build/ using the provided scripts in ts-build/package.json.

Update => Outdated: Exploring jsonModules in ES2025

This commit focuses on the new jsonModules feature introduced in ES2025.

git checkout jsonModules

Related Proposals

• Iterator Helpers Proposal (TC39-Stage 4) – Adds handy methods like map, filter, take, and more to JavaScript's Iterator prototype via a standard-stage TC39 proposal. (GitHub repo)

Angular Framework Fix (Arrow Functions in Templates)

The following links document a developer-led exploration carried out as part of regular learning, covering an issue related to arrow functions in Angular templates and how it was fixed in the Angular framework.

• Dev blog – Angular 21.2 arrow functions gotchas
• Angular issue #14129
• Angular fix commit
• Angular v21.2.0-next.0 release