score:3

Accepted answer 
this.state.list_check.map((item, i) => {
    const NecessaryButton = item ? SelectedButton : Button;
    return <NecessaryButton onClick={() => this.makeSelected(i)}>Normal Button</NecessaryButton>
})

score:1 

  const Button = styled.div`
  styleName: ${props => props.isSelected ? 'styling_if_Selected' : 'styling_if_not_selected'};
`;

score:1 

render(){
  <Wrapper>
    {list.map((i) => {
      return (this.state.isSelected 
         ? <Button id={i} onClick = {this.customFunc.bind(this, i)} /> 
         : <Button_Selected id={i} onClick = {this.customFunc.bind(this, i)} />)
    }
  </Wrapper>
}

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