React - Styled Component with multiple classes

Question

I'm about to build a small project in react using styled component, however, I have a question for using this package. I would like to create a styled component that brings together several classes but I don't know how to do, for example :

<div class="search-input search-input-small">

How to turn it into a styled component ? In css there are two different classes, but in styled component i don't know.

Thank you.

Answer 1

There are a few ways to do this. For example, you could run with the base styling on a styled component and then "upgrade that with the additional styling.

const Div = styled.div`
     /// styles for className -> search-input
    }`
const SmallDiv = styled(Div)`
    /// styles for className -> search-input-small
   `

Also, if you know SASS you can structure your CSS with nesting using &. e.g.

 const Div = styled.div`
     .search-input {
          //CSS
          &-small {
             //CSS
           }
         
         }
     `

Answer 2

With styled-components, you can go with a similar format.

Here we are creating a styled component named Div, within the styled component I've declared classes .search-input and .search-input.search-input-small to style the div from your example.

The Div is being treated as a parent container.

const Div = styled.div`

display: flex;
background-color: black; 

.search-input {
background-color: blue;
}
.search-input.search-input-small {
color: white;

}
`;

We call the newly created styled component like this:

export default function App() {
  return (
      <Div>
      <div className="search-input search-input-small">Hello</div>
      </Div>
  
  );
}

As you can see the <div class="search-input search-input-small"> from your example is a child to the parent Div. The parent Div does not require styles but I have included them for this example.

Also here is a codesandbox with a working example.