正在跳转至 https://babeljs.io/repl#?browsers=defaults%2C%20not%20ie%2011%2C%20not%20ie_mob%2011&build=&builtIns=false&corejs=3.6&spec=false&loose=false&code_lz=DwEwlgbgfAUABHYAHKAJApgG0wezgdxwCdMRBAf-AHoUYrxoYYAzAVwDsBjAFzBzbgAi6ALY4AFAEo4Ab3hwi6LiyL9QkKAAssuAsVJ11MAL5A&debug=false&forceAllTransforms=false&shippedProposals=false&circleciRepo=&evaluate=false&fileSize=false&timeTravel=false&sourceType=module&lineWrap=true&presets=env%2Creact%2Cstage-2&prettier=true&targets=&version=7.16.6&externalPlugins=&assumptions=%7B%7D