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In my particular case, I've tried both of the followings, they all work, wonder the underlying differences between them.

// echarts v5.0.0
export * as ECharts from 'echarts/lib/echarts.js'
export { default as ECharts } from 'echarts/lib/echarts.js'
babel.config.js
module.exports = {
  // "@vue/cli-plugin-babel": "~4.5.0",
  presets: ['@vue/cli-plugin-babel/preset'],
                They are absolutely not the same. They might have the same result depending on what foo exports (or further, what your transpiler or module loader does with it) - please post that as well.
– Bergi
                Jan 5, 2021 at 13:22
                Does this answer your question? Difference between import X and import * as X in node.js (ES6 / Babel)?
– marzelin
                Jan 5, 2021 at 13:45
This one exports all named exports and default export from foo as bar:
export * as bar from 'foo'
This one only exports default export from foo as bar:
export { default as bar } from 'foo'
        
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