您即将离开腾讯云开发者社区,请注意您的账号财产安全
https://babeljs.io/repl#?babili=false&browsers=&build=&builtIns=false&spec=false&loose=false&code_lz=MYewdgzgLgBGCGBbApjAvDA5AYQBYCcBLCTAbgChRJZEBPAUQBtkUxYMAeXARgD4BJGEhgBvBCgC-HAPQ9epIA&debug=false&forceAllTransforms=false&shippedProposals=false&circleciRepo=&evaluate=false&fileSize=false&timeTravel=false&sourceType=module&lineWrap=true&presets=es2015,react,stage-2&prettier=false&targets=&version=7.4.4&externalPlugins=