rev2022.11.3.43005. Its also possible to pass to ngClass a string, that contains all the CSS classes that we want to apply to a given element: This syntax would give the same results as before, meaning that the two CSS classes btn and btn-primary would still be applied. This post will cover the following topics: In order to cover each feature, we will be adding the multiple examples to this small Angular CLI sample application, that will use as external styles a Bootstrap default theme. First, see this tutorial on how to Integrate primeng into Angular for doing the below things. Create Angular Application third-party library. -->