1、重新安装依赖
a) yarn add babel-preset-es2015 --dev
b) npm install babel-preset-es2015 -D
2、修改babel.config.js配置
module.exports = {
presets: ['@vue/cli-plugin-babel/preset', ['@babel/preset-env', { modules: false }]],
plugins: [
[
'component',
{
libraryName: 'element-ui',
styleLibraryName: 'theme-chalk'
}
]
]
}