Styled-components is not working with react - reactjs

Question

I install styled components in my react project. but when I am styling using styled-components styling does not work. Is there any more additional setting doing to work with styled components?Plz help
yarn add styled-components
Navbar.jsx
import React from 'react';
import styled from 'styled-components';
const Container = styled.div`
height: '60px';
background-color: 'black';
`;
const Navbar = () => {
return <Container>nav</Container>;
};
export default Navbar;
package.json:-
{
"name": "client",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^5.11.4",
"#testing-library/react": "^11.1.0",
"#testing-library/user-event": "^12.1.10",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-scripts": "4.0.3",
"styled-components": "^5.3.3",
"web-vitals": "^1.0.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"#types/styled-components": "^5.1.15"
}
}

Answer 1

You are writing styled components in the wrong way. Write styled-components CSS as like as normal css. You don't need to put CSS value in string quotation (" ").
const Container = styled.div`
height: 60px;
background-color: black;
`;