:rewrite-polyfills

Rewrite any ES6+ feature usage with Closure Library's polyfills. :language-in must be at least :es6. Defaults to false.

:rewrite-polyfills true

All supported polyfills listed below (from polyfills.txt):

Native symbol	Native version	Polyfill version	Polyfill library
Array.from	es6	es3	es6/array/from
Array.of	es6	es3	es6/array/of
Array.prototype.copyWithin	es6	es3	es6/array/copywithin
Array.prototype.entries	es6	es3	es6/array/entries
Array.prototype.fill	es6	es3	es6/array/fill
Array.prototype.find	es6	es3	es6/array/find
Array.prototype.findIndex	es6	es3	es6/array/findindex
Array.prototype.includes	es7	es3	es6/array/includes
Array.prototype.keys	es6	es3	es6/array/keys
Array.prototype.values	es6	es3	es6/array/values
Map	es6	es3	es6/map
Math.acosh	es6	es3	es6/math/acosh
Math.asinh	es6	es3	es6/math/asinh
Math.atanh	es6	es3	es6/math/atanh
Math.cbrt	es6	es3	es6/math/cbrt
Math.clz32	es6	es3	es6/math/clz32
Math.cosh	es6	es3	es6/math/cosh
Math.expm1	es6	es3	es6/math/exp1m
Math.hypot	es6	es3	es6/math/hypot
Math.imul	es6	es3	es6/math/imul
Math.log10	es6	es3	es6/math/log10
Math.log1p	es6	es3	es6/math/log1p
Math.log2	es6	es3	es6/math/log2
Math.sign	es6	es3	es6/math/sign
Math.sinh	es6	es3	es6/math/sinh
Math.tanh	es6	es3	es6/math/tanh
Math.trunc	es6	es3	es6/math/trunc
Number.EPSILON	es6	es3	es6/number/constants
Number.MAX_SAFE_INTEGER	es6	es3	es6/number/constants
Number.MIN_SAFE_INTEGER	es6	es3	es6/number/constants
Number.isFinite	es6	es3	es6/number/isfinite
Number.isInteger	es6	es3	es6/number/isinteger
Number.isNaN	es6	es3	es6/number/isnan
Number.isSafeInteger	es6	es3	es6/number/issafeinteger
Object.assign	es6	es3	es6/object/assign
Object.entries	es8	es3	es6/object/entries
Object.getOwnPropertyDescriptors	es8	es5	es6/object/getownpropertydescriptors
Object.getOwnPropertySymbols	es6	es5	es6/object/getownpropertysymbols
Object.is	es6	es3	es6/object/is
Object.setPrototypeOf	es6	es5	es6/object/setprototypeof
Object.values	es8	es3	es6/object/values
Promise	es6	es3	es6/promise
Proxy	es6	es6
Reflect.apply	es6	es3	es6/reflect/apply
Reflect.construct	es6	es3	es6/reflect/construct
Reflect.defineProperty	es6	es5	es6/reflect/defineproperty
Reflect.deleteProperty	es6	es3	es6/reflect/deleteproperty
Reflect.get	es6	es5	es6/reflect/get
Reflect.getOwnPropertyDescriptor	es6	es5	es6/reflect/getownpropertydescriptor
Reflect.getPrototypeOf	es6	es5	es6/reflect/getprototypeof
Reflect.has	es6	es3	es6/reflect/has
Reflect.isExtensible	es6	es3	es6/reflect/isextensible
Reflect.ownKeys	es6	es5	es6/reflect/ownkeys
Reflect.preventExtensions	es6	es3	es6/reflect/preventextensions
Reflect.set	es6	es5	es6/reflect/set
Reflect.setPrototypeOf	es6	es5	es6/reflect/setprototypeof
Set	es6	es3	es6/set
String.fromCodePoint	es6	es3	es6/string/fromcodepoint
String.prototype.codePointAt	es6	es3	es6/string/codepointat
String.prototype.endsWith	es6	es3	es6/string/endswith
String.prototype.includes	es6	es3	es6/string/includes
String.prototype.normalize	es6	es6
String.prototype.padEnd	es8	es3	es6/string/padend
String.prototype.padStart	es8	es3	es6/string/padstart
String.prototype.repeat	es6	es3	es6/string/repeat
String.prototype.startsWith	es6	es3	es6/string/startswith
String.raw	es6	es6
WeakMap	es6	es3	es6/weakmap
WeakSet	es6	es3	es6/weakset