数组作为子元素很常见
- // We use map() to create an array of React Elements for every value in the array.
- (<ul>
- {["first","second"].map((item) => (
- <li>{item}</li>
- ))}
- </ul>)
- //That’s equivalent to providing a literal array.
- (<ul>
- {[
- <li>first</li>,<li>second</li>
- ]}
- </ul>)
- // This pattern can be combined with destructuring,JSX Spread Attributes,and other components,for some serIoUs terseness.
- (<ul>
- {arrayOfMessageObjects.map(({ id,...message }) =>
- <Message key={id} {...message} />
- )}
- </ul>)