Webpack4.X index.js loaded twice

according to the practice of webpack official website:

clipboard.png
index.html


src/index.js


webpack.config.js


package.json


:

clipboard.png

clipboard.png

clipboard.png
Q: why was it executed twice? Ask the Great God to tell


< script src= "main.js" > < / script > since you chose htmlWebpackPlugin, this sentence is superfluous.
this causes you to quote main.js twice, and of course you output twice

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