---
id: 2891
title: "JavaScript ES2021 - You Need To See These ES12 Features"
source_domain: hackerone.com
source_url: "https://www.hackerone.com/blog/javascript-es2021-you-need-see-these-es12-features"
published_at: "2021-01-18T00:00:00Z"
tags: ["cloud", "javascript", "frontend", "web-development", "es2021", "ecmascript"]
phying_url: "https://phying.com/item/2891"
lang: en
---

# JavaScript ES2021 - You Need To See These ES12 Features

## Summary

A walkthrough of ES2021 (ES12) features still in stage 4 at publication: replaceAll, Promise.any, WeakRef, logical assignment operators, and numeric separators for readability.

## Intelligence Metadata

- **Sources:** hackerone.com
- **Published:** 2021-01-18T00:00:00Z
- **Original:** https://www.hackerone.com/blog/javascript-es2021-you-need-see-these-es12-features
- **Phying News:** https://phying.com/item/2891