It occur a error when i use providePlugin

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After I build the script file, and excuted on my page, it happen:



It seems because that those codes was not written in strict mode but run in strict mode. I can not modify the code source for some reason, how can i fix it by pass params when i build, such as

new webpack.ProvidePlugin({
   ...
   strictMode : false
})

what should i do?