JSX中返回配对元素

JSX中返回配对元素

本文介绍了在React JSX中返回配对元素的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

问题:

在React中,您希望通过映射数组来创建DOM结构,但数组中的每个项目都应返回2个元素。例如

In React, you want to create a DOM structure by mapping an array, but each item in the array should return 2 elements. e.g.

import React from 'react'
import _ from 'lodash'

let { Component } = React

export default class DataList extends Component {
  render () {
    let array = [
      {def: 'item1', term: 'term1', obj1: 'rand'},
      {def: 'item2', term: 'term2'}
    ]
    return (
      <dl>
        {_.map(array, (item) => {
          return (
            <dt>{item.def}</dt>
            <dd>{item.term}</dd>
          )
        })}
      </dl>
    )
  }
}

React不允许你渲染兄弟姐妹而不将它们包装在容器元素中,这会破坏DOM结构。

React doesn't let you render siblings without wrapping them in a container element, which would break the DOM structure here.

推荐答案

你可以用 reduce 做一些更简单的事情:

You could do something simpler with reduce like this:

import React, { Component } from 'react';

export default class DataList extends Component {
  render () {
    const array = [
      {def: 'item1', term: 'term1', obj1: 'rand'},
      {def: 'item2', term: 'term2'}
    ];

    return (
      <dl>
        {array.reduce((acc, item, idx) => {
            return acc.concat([
                <dt key={`def-${idx}`}>{item.def}</dt>,
                <dd key={`term-${idx}`}>{item.term}</dd>
            ]);
        }, [])}
      </dl>
    );
  }
}

DEMO ::

这篇关于在React JSX中返回配对元素的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-18 08:51