feat: preserve path separators when stripping projectRoot

src/transformers/StripProjectRoot.ts

@@ -21,13 +21,20 @@ export default async function stripProjectRoot (sourceMapPath: string, sourceMap
 
 function strip (sourceMapPath: string, map: UnsafeSourceMap, projectRoot: string): void {
  if (!map.sources) return
- map.sources = map.sources.map(s => {
+ map.sources = map.sources.map(sourcePath => {
  // leave sources for virtual webpack files untouched
- if (/^webpack:\/\/(.*)\/webpack/.test(s)) return s
+ if (/^webpack:\/\/(.*)\/webpack/.test(sourcePath)) return sourcePath
+
+ // detect if s uses windows file separators
+ const isWindowsPath = sourcePath.includes('\\')
+ const separator = isWindowsPath ? '\\' : '/'
+
  const absoluteSourcePath = path.resolve(
  path.dirname(sourceMapPath),
- s.replace(/webpack:\/\/.*\/\.\//, `${projectRoot}/`)
+ sourcePath.replace(/webpack:\/\/.*\/\.\//, `${projectRoot}${separator}`)
  )
- return absoluteSourcePath.replace(projectRoot, '').replace(/^(\/|\\)/, '')
+ const strippedSourcePath = absoluteSourcePath.replace(projectRoot, '').replace(/^(\/|\\)/, '')
+ const normalizedSourcePath = isWindowsPath ? strippedSourcePath.replace(/\//g, '\\') : strippedSourcePath.replace(/\\/g, '/')
+ return normalizedSourcePath
  })
 }