conditional rendering in styled components

You can simply do this

<Tab active={this.state.active} onClick={this.handleButton}></Tab>

And in your styles something like this:

const Tab = styled.button`
  width: 100%;
  outline: 0;
  border: 0;
  height: 100%;
  justify-content: center;
  align-items: center;
  line-height: 0.2;

  ${({ active }) => active && `
    background: blue;
  `}
`;

I didn't notice any && in your example, but for conditional rendering in styled-components you do the following:

// Props are component props that are passed using <StyledYourComponent prop1="A" prop2="B"> etc
const StyledYourComponent = styled(YourComponent)`
  background: ${props => props.active ? 'darkred' : 'limegreen'}
`

In the case above, background will be darkred when StyledYourComponent is rendered with active prop and limegreen if there is no active prop provided or it is falsy Styled-components generates classnames for you automatically :)

If you want to add multiple style properties you have to use css tag, which is imported from styled-components:

I didn't notice any && in your example, but for conditional rendering in styled-components you do the following:

import styled, { css } from 'styled-components'
// Props are component props that are passed using <StyledYourComponent prop1="A" prop2="B"> etc
const StyledYourComponent = styled(YourComponent)`
  ${props => props.active && css`
     background: darkred; 
     border: 1px solid limegreen;`
  }
`

OR you may also use object to pass styled, but keep in mind that CSS properties should be camelCased:

import styled from 'styled-components'
// Props are component props that are passed using <StyledYourComponent prop1="A" prop2="B"> etc
const StyledYourComponent = styled(YourComponent)`
  ${props => props.active && ({
     background: 'darkred',
     border: '1px solid limegreen',
     borderRadius: '25px'
  })
`

Here is an simple example with TypeScript:

import * as React from 'react';
import { FunctionComponent } from 'react';
import styled, { css } from 'styled-components';

interface IProps {
  isProcessing?: boolean;
  isDisabled?: boolean;
  onClick?: () => void;
}

const StyledButton = styled.button<IProps>`
  width: 10rem;
  height: 4rem;
  cursor: pointer;
  color: rgb(255, 255, 255);
  background-color: rgb(0, 0, 0);

  &:hover {
    background-color: rgba(0, 0, 0, 0.75);
  }

  ${({ disabled }) =>
    disabled &&
    css`
      opacity: 0.5;
      cursor: not-allowed;
    `}

  ${({ isProcessing }) =>
    isProcessing &&
    css`
      opacity: 0.5;
      cursor: progress;
    `}
`;

export const Button: FunctionComponent<IProps> = ({
  children,
  onClick,
  isProcessing,
}) => {
  return (
    <StyledButton
      type="button"
      onClick={onClick}
      disabled={isDisabled}
      isProcessing={isProcessing}
    >
      {!isProcessing ? children : <Spinner />}
    </StyledButton>
  );
};

<Button isProcessing={this.state.isProcessing} onClick={this.handleClick}>Save</Button>