Features Babel does and doesn't transpile

babel-polyfill.md

Features that need to be compiled

• Arrow functions
• Async functions
• Async generator functions
• Block scoping
• Block scoped functions
• Classes
• Class properties
• Computed property names
• Constants
• Decorators
• Default parameters
• Destructuring
• Do expressions
• Exponentiation operator
• For-of
• Function bind
• Generators
• Modules
• Module export extensions
• New literals
• Object rest/spread
• Property method assignment
• Property name shorthand
• Rest parameters
• Spread
• Sticky regex
• Template literals
• Trailing function commas
• Type annotations
• Unicode regex

Features that need to be polyfilled

• ArrayBuffer
• Array.from
• Array.of
• Array#copyWithin
• Array#fill
• Array#find
• Array#findIndex
• Function#name
• Map
• Math.acosh
• Math.hypot
• Math.imul
• Number.isNaN
• Number.isInteger
• Object.assign
• Object.getOwnPropertyDescriptors
• Object.is
• Object.entries
• Object.values
• Object.setPrototypeOf
• Promise
• Reflect
• RegExp#flags
• Set
• String#codePointAt
• String#endsWith
• String.fromCodePoint
• String#includes
• String.raw
• String#repeat
• String#startsWith
• String#padStart
• String#padEnd
• Symbol
• WeakMap
• WeakSet