Map sourceMap to devtool

[stevenvachon]

• Operating System: macOS 10.14
• Node Version: 10.11.0
• NPM Version: 6.4.1
• webpack Version: 4.20.2
• uglifyjs-webpack-plugin Version: 2.0.1

Currently, the sourceMap option must be explicitly defined when it'd be much more convenient for it to rely on the value of Webpack's devtool option.

[alexander-akait]

@stevenvachon please format your issue using issue template and reopen

[stevenvachon]

I'm not allowed to reopen an issue that's been closed by a collaborator.

[alexander-akait]

/cc @michael-ciniawsky

[heisian]

Yeah, this is an unfortunate side-effect - if one sets devtool in the base Webpack config, UglifyJsPlugin should read that config and respond accordingly..

Or at least emit some sort of warning - currently there is no way to tell from build output that sourceMap is needed. If you have 10+ plugins, how do you know which one is causing the issue?

It is actually, IMO, a bug that souceMap: true doesn't get set by UglifyJsPlugin because it alters the way the base Webpack configuration affects the build process.

[heisian]

https://stackoverflow.com/a/41889062

[alexander-akait]

It was fixed in next major release, because it is breaking change