ES2016+新特性记录(逐年更新)

• ES2015
• ES2016
  1. Array.prototype.includes
  2. Exponentiation operator
• ES2017
  1. Object.values/Object.entries
  2. String padding
  3. Object.getOwnPropertyDescriptors
  4. Trailing commas in function parameter lists and calls
  5. Async functions
  6. Shared memory and atomics
• ES2018
  1. Lifting template literal restriction
  2. s (dotAll) flag for regular expressions
  3. RegExp named capture groups
  4. Rest/Spread Properties
  5. RegExp Lookbehind Assertions
  6. RegExp Unicode Property Escapes
  7. Promise.prototype.finally
  8. Asynchronous Iteration
• ES2019
  1. Optional catch binding
  2. JSON superset
  3. Symbol.prototype.description
  4. Function.prototype.toString revision
  5. Object.fromEntries
  6. Well-formed JSON.stringify
  7. String.prototype.{trimStart,trimEnd}
  8. Array.prototype.{flat,flatMap}
• ES2020
  1. String.prototype.matchAll
  2. import()
  3. BigInt
  4. Promise.allSettled
  5. globalThis
  6. for-in mechanics
  7. Optional Chaining
  8. Nullish coalescing Operator
  9. import.meta
• ES2021
  1. String.prototype.replaceAll
  2. Promise.any
  3. WeakRefs
  4. Logical Assignment Operators
  5. Numeric separators
• ES2022
  1. Class Fields (Private instance methods and accessors, Class Public Instance Fields & Private Instance Fields, Static class fields and private static methods)
  2. RegExp Match Indices
  3. Top-level await
  4. Ergonomic brand checks for Private Fields
  5. .at()
  6. Accessible Object.prototype.hasOwnProperty
  7. Class Static Block
  8. Error Cause