Using parcel to package code, how to convert .default to ['default'] to be compatible with IE8

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I use Baidu san for development and parcel for packaging. The packaged code has default incompatibility and IE8, can only be modified manually after packaging. Is there an es3ify, similar to webpack? what to do? ask for advice!

Ie8-compatibility san parcel

Nov.08,2021

excuse me, have you solved

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