const plugins = [] const testPreset = ['@babel/preset-env', { 'targets': { 'node': 'current' } }] const devPreset = ['@vue/app', { 'targets': { 'browsers': ['since 2015', 'not dead', 'ie 9'], }, 'useBuiltIns': 'usage', // 'debug': true, }] const presets = process.env.NODE_ENV === 'test' ? testPreset : devPreset module.exports = { presets: [presets], plugins, sourceType: 'unambiguous', }