Allow parsing of class properties
Apply ES2015 function.name semantics to all functions
Allow parsing of the logical assignment operators
Compile ES2015 destructuring to ES5
Explode async and generator functions into a state machine.
Compile ES2015 sticky regex to an ES5 RegExp constructor
Compile ES2015 spread to ES5
Convert promised code to use node style callbacks
Compile ES2015 arrow functions to ES5
Allow parsing of Decimal, Binary, Hex and Octal literals that contain a Numeric Literal Separator
Compile regular expressions using named groups to ES5.
Allow parsing of the U+2028 LINE SEPARATOR and U+2029 PARAGRAPH SEPARATOR in JS strings
Allow parsing of import.meta
Transform TypeScript into ES.next
Compile ES2015 unicode string and number literals to ES5
Compile ES2015 template literals to ES5
Transform optional chaining operators into a series of nil checks
Allow parsing of the module assertion attributes in the import statement
Turn async functions into ES2015 generators
Allow parsing of the nullish-coalescing operator
Allow parsing of optional catch bindings
Allow parsing of object rest/spread
Compile exponentiation operator to ES5
Allow parsing of top-level await in modules