{
  	"presets": [
    	["@babel/preset-env",
      		{
        		"useBuiltIns": "usage",
        		"corejs": 3
      		}
    	]
  	],
  	"plugins": [
    	[
      		"@babel/plugin-transform-runtime", 
      		{
      			"corejs": 3
    		}
    	],
    	[
    		"@babel/plugin-transform-modules-commonjs"
    	]  //使commonjs能被处理为前端识别的代码
  	]
}