React Conditional Rendering Inline If-Else with Conditional Operator - dig.codes

React Conditional Rendering Inline If-Else with Conditional Operator

In the example below, we use it to conditionally render a small block of text.

render() {
  const isLoggedIn = this.state.isLoggedIn;
  return (
    <div>
      The user is <b>{isLoggedIn ? 'currently' : 'not'}</b> logged in.    </div>
  );
}

React Conditional Rendering Inline If-Else with Conditional Operator

It can also be used for larger expressions although it is less obvious what’s going on:

render() {
  const isLoggedIn = this.state.isLoggedIn;
  return (
    <div>
      {isLoggedIn        ? <LogoutButton onClick={this.handleLogoutClick} />
        : <LoginButton onClick={this.handleLoginClick} />      }
    </div>  );
}

edit a flatlist item in react native

In <TodoItem /> you can similar logic for modifing todo text as you use in <AddTodo /> for creating new todo. I use conditional rendering to render the <TextInput /> when isEditing is true, and <Text /> when it's not.

{isEditing 
  ? <TextInput value={text} onChangeText={setText} style={styles.itemText} />
  : <Text style={styles.itemText}>{props.title}</Text>
}

return user input in react?

We can then use conditional rendering to display the term or definition for each card.

{c.flipped ? c.definition : c.term}

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