I was trying to upgrade my ionic project to ionic v4 (beta11).
I found out that the sourceMap somehow did not work on ionic 4.
see the screenshot below , only sourcemap to transpiled js files were presented
I searched around and can not find any useful clues.
I rasied an issue against ionic project https://github.com/ionic-team/ionic/issues/15152
and had not had any feed back
Does anyone has any idea about how to enable source Map to typescript