taro-demo/babel.config.js

// babel-preset-taro 更多选项和默认值：
// https://github.com/NervJS/taro/blob/next/packages/babel-preset-taro/README.md
module.exports = {
  presets: [
    ['taro', {
      framework: 'react',
      ts: false
    }]
  ]
}