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Update ECMAScript feature status, include ES2021 #1052

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Jan 14, 2022
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Update ECMAScript feature status, include ES2021 #1052

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Update ECMAScript feature status, include ES2021
lahma Jan 14, 2022
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Update README.md
lahma Jan 14, 2022
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21 changes: 20 additions & 1 deletion README.md
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Expand Up @@ -67,12 +67,31 @@ The entire execution engine was rebuild with performance in mind, in many cases
#### ECMAScript 2019

- ✔ `Array.prototype.flat`, `Array.prototype.flatMap`
- ✔ `String.prototype.trimStart`, `String.prototype.trimEnd`
- ✔ `Object.fromEntries`
- ✔ `Symbol.description`
- ✔ Optional catch binding

#### ECMAScript 2020

- ✔ BigInt
- ✔ `BigInt`
- ❌ `export * as ns from`
- ✔ `for-in` enhancements
- ✔ `globalThis` object
- ❌ `import`
- ❌ `import.meta`
- ✔ Nullish coalescing operator (`??`)
- ✔ Optional chaining
- ❌ `Promise.allSettled`
- ✔ `String.prototype.matchAll`

#### ECMAScript 2021

- ✔ Logical Assignment Operators (`&&=` `||=` `??=`)
- ✔ Numeric Separators (`1_000`)
- ❌ `Promise.any` and `AggregateError`
- ❌ `String.prototype.replaceAll`
- ❌ `WeakRef` and `FinalizationRegistry`

#### Other

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