Manual:$wgResourceLoaderValidateJS

ResourceLoader: $wgResourceLoaderValidateJS
Whether to parse JavaScript module prior to minification to validate them.
Introduced in version:1.18.0 (r91608)
Removed in version:still in use
Allowed values:(boolean)
Default value:true

Details edit

If set to true, JavaScript modules loaded from wiki pages will be parsed prior to minification to validate them.

Parse errors will result in a JS exception being thrown during module load, which avoids breaking other modules loaded in the same request.