JavaScript developers are looking forward to updates in ECMAScript 2026, which includes several features that aim to simplify and improve their coding experience. One of the most anticipated updates is Math.sumPrecise, a new method for summing numbers with high precision.
Currently, JavaScript’s Math object lacks a precise method for adding numbers, leading to potential issues with floating-point arithmetic. The new method provides more accurate results, making it easier to work with large numbers.
Another update is Uint8Array to base64 proposal, which adds methods to encode and decode binary data as base64. This feature will make it simpler for developers to handle binary data, such as image files or SSH keys.
The JSON.parse Source Text proposal allows developers to retrieve the raw JSON source and convert it into a precise format, making it easier to work with numbers and dates.
Error.isError is another proposed update that makes it easier to check whether a value is an error object. This feature will be useful for debugging and writing polyfills.
The Iterator Sequencing proposal simplifies the process of chaining iterators together, making it easier to work with asynchronous code.
ECMAScript 2026 will also include Improving Internationalization and Localization, which enhances the Intl Locale API to handle different languages and regions.
Explicit Resource Management is another update that makes it easier for developers to clean up resources, such as memory. This feature simplifies resource management, making it more ergonomic and standardized.
The Temporal API is a long-awaited replacement for JavaScript’s broken Date object, providing better support for time zones and dates.
Deferred Module Imports is another proposal that improves performance by allowing modules to be loaded on demand. This feature will speed up startup times for large web applications.
Finally, Upsert is a new method for checking whether a value exists in a map or weak map, making it easier to perform common database operations.
Source: https://thenewstack.io/es2026-solves-javascript-headaches-with-dates-math-and-modules