Manual:$wgResourceLoaderEnableSourceMapLinks

ResourceLoader: $wgResourceLoaderEnableSourceMapLinks
Whether to include a SourceMap header in ResourceLoader responses for JavaScript modules.
Introduced in version:1.41.0 (Gerrit change 947502; git #7c2c016e)
Removed in version:Still in use
Allowed values:Unspecified
Default value:true (gerrit:960659)