将要访问
https://babeljs.io/repl/#?babili=false&browsers=&build=&builtIns=false&code_lz=PTBUAJS7wUQYwLYEMDK8BOBLADgF3ACYAGARgFZwAKWVANgEoAucZDDAewHdwAzAVwB28PFg6CAzgCgAbm3DwsGeABsApgEEMa5LUoBePkJFjBCpas3bkVDA3ABvKeHByM4AAoBJcIYDMAHSkACwA3M6u8mw6vp4-EO4J4S7aePwYZtHI4QC-4fDiEhzqASocAOZUisrqWjp6VIQMDOFSBZIE1ZZ1yLHu-gB8juAgjqQ5Ee0SBN6xgSHJCoUEWbGzCZDgGIup6ZnWufmFxWqlFVUWtdaNza1TnZdWOoR9vkPzwZuJW0eSJ2eVLpXZ43FpSNrLcAACzUKjKsSo9kGSz-JTKlQA5DC4RwAIQYsHYsqI0JAA&debug=false&circleciRepo=&evaluate=true&lineWrap=true&presets=es2015%2Ces2016%2Ces2017%2Cstage-2&prettier=false&targets=&version=6.26.0
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