style={{ textDecoration: todo.completed && "line-through" }} style={{ textDecoration: todo.completed ? "line-through" : 'none' }}
class App extends Component { constructor() { super() this.state = { isRed: true } } render() { const isRed = this.state.isRed return <p style={{ color: isRed ? 'red' : 'blue' }}>Example Text</p> } }
<ImageBackground source={Images.bg} style={ (navHeight==0) ? styles.bg1 : styles.bg2}>