When I want to use the mathjax module in a child module the build throws an error, which says "A value for 'forChild' cannot be determined statically, as it is an external declaration." I changed the return type of forChild to ModuleWithProviders locally and it fixed the problem for me.
Also If you use the MathjaxModule in a child module it goes into an inifinite loop (possibly because the child module also puts the mathjax script into the DOM).
When I want to use the mathjax module in a child module the build throws an error, which says "A value for 'forChild' cannot be determined statically, as it is an external declaration." I changed the return type of
forChild
toModuleWithProviders
locally and it fixed the problem for me.