Is it worth learning css frameworks like Bootstrap?

Question

css

Most interested in adaptive. Will the sass framework suffice as a replacement for bootstrap (and others)?

Answer 1

The question is not clear.
Bootstrap is a set of classes with styles for building template pages.
SASS - Syntactic Sugar of CSS
One to the other nothing at all
Knowledge of CSS will be enough :)

Answer 2

SASS is not a framework, but a language. Whether or not to learn Bootstrap depends on whether you want to develop or not.

Answer 3

Here, first you need to decide what sass is. And it's not a framework. There are no ready-made components in it, it's just a metalanguage that simplifies writing css code. For example, there are variables and so on. A bootstrap is a set of stylized ready-made components (eg buttons, tables). That is, they are different things, and sass is not a replacement for bootstrap.

Answer 4

Learn @media queries in css.
This is definitely enough to implement the adaptive!