[javascript] startsWith(), endsWith(), include()
[javascript] for, for each, for of
[javascript] spread operator
[javascript] from()
[javascript] destructuring
[javascript] set, weakSet, map, weakMap
[javascript] Arrow function
[javascript] default prameters
[javascript] rest parameters
[javascript] class
[javascript] object assign
[javascript] setPrototypeof
[javascript] module(export & import)
[javascript] proxy
[javascript] var, const, let