打包后的产物 x.moduel.mjs 存在箭头函数，导致IE 无法兼容

[hduhdc]

打包后的产物 x.moduel.mjs 存在箭头函数，导致IE 无法兼容
Object.keys({name:1}).forEach(key => {
console.log(key)
});
打包后结果
Object.keys({name:1}).forEach(e=>{console.log(e)}); //# sourceMappingURL=test-microbundle.modern.mjs.map

[rschristian]

This is correct behavior. The modern output is ES2017: https://github.com/developit/microbundle#-modern-mode-

If you really need IE support, use CJS, ESM, or UMD outputs. Modern is specifically for dropping the baggage those formats ship with.

[rschristian]

Please use English, I don't understand what you're trying to say.

[hduhdc]

Please use English, I don't understand what you're trying to say.
I know my mistake，if my packge is foo，when i use import foo from 'foo '
If the configuration of my package. json is as follows
"exports": {

"default": "./lib/foo.js" 

},
Is it possible to avoid using it by default ./lib/modern.mjs