conditional style prop react

1class App extends Component {
2  constructor() {
3    super()
4    this.state = { isRed: true }
5  }
6
7  render() {
8    const isRed = this.state.isRed
9
10    return <p style={{ color: isRed ? 'red' : 'blue' }}>Example Text</p>
11  }
12}

1style={{ textDecoration: todo.completed && "line-through" }}
2
3style={{ textDecoration: todo.completed ? "line-through" : 'none' }}

1<ImageBackground source={Images.bg} style={ (navHeight==0) ? styles.bg1 : styles.bg2}>