Our code is usually the converted es6 into es5, all the time is being given location es5 where the code, the line number is wrong, then so unreasonable, set by devtoll
Use in a development environment (do not use online this way, you will be exposed to the source code)
devtool: 'source-map'
It shows the original source code
Use the online environment
devtool: 'cheap-source-map'
Displaying the converted codes
Two options above will generate a separate mapping file .map
If you do not want this configuration, the reference here: https://www.webpackjs.com/configuration/devtool/
We generally like configuration