How to reuse css class content in another class without copying?

Question

Is it possible to use existing css class as content in another class ?

I mean something like:

Contained in some library:
.class1 { text-indent: 100 }

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Answer 1

You can define 2 classes in this way

.class1, .class2 { text-indent: 100 }

And it will work for you

Moreover if you want to ad some more in class2 then you can define it

.class2 { /*whatever you want here*/ }