I had developed an angular project which has structure in applications and library in bootstrap 3 months ago. Now I need to migrate the whole project to primeNg components. So I rewritten the applicaiton components in PrimeNg, but due lack of time I am unable to migrate the library components into primeNg. So for temparary solution I want merge the library components with bootstrap and main application components with primeNg css, but I am unable to merge I am getting mixin and same class tags conflicts and primeNg css got overriding with bootstrap css. How can I apply/load bootstrap css to only library components without conflicting to main application.