{
    "presets": [
        [
            "@babel/preset-env",
            {
                "modules": false,
                "targets": {
                    "browsers": [
                        "> 1%",
                        "last 2 versions",
                        "not ie <= 8"
                    ]
                }
            }
        ],
        "@babel/preset-react"
    ],
    "plugins": [
        [
            "@babel/plugin-transform-runtime",
            {
                "corejs": 2, // polyfill 需要使用@babel/runtime-corejs2
                "useBuildIns": "usage" //按需引入,即使用什么新特性打包什么新特性, 可以减小打包的体积
            }
        ],
        [
            "import",
            { // 按需加载antd
                "libraryName": "antd",
                "libraryDirectory": "es",
                "style": "css" // `style: true` 会加载 less 文件
            }
        ],
        [
            "@babel/plugin-proposal-decorators",
            {
                "legacy": true
            }
        ], // 配置对装饰器的支持
        //   ["@babel/plugin-proposal-class-properties",{"loose":true}] // 支持类属性的插件
    ]
}