ECMAScript 12th Edition (ES12 / ECMAScript 2021)

ES12 (or ECMAScript 2021) added features such as:

• String.prototype.replaceAll
• Promise.any
• AggregateError
• Logical assignment operators: ??=, &&=, ||=)
• Separation for numeric fields (e.g., 1_000)
• More reliable implementation of Array.prototype.sort

Sources / related

• ECMAScript version history
• caniuse.com – es12