const path = require('path')
module.exports = {
    presets: [
        [
            '@babel/preset-env',{
                // 可以entry或者usage
                useBuiltIns: 'entry',
                corejs: 3,
            },
        ],
    ],
    plugins: [
        [
          "@babel/plugin-transform-runtime",
          {
            corejs: false,
            version: require('@babel/runtime-corejs3/package.json').version,
            absoluteRuntime: path.dirname(
                require.resolve('@babel/runtime-corejs3/package.json')
            )
          }
        ]
    ]
};