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O'Reilly Platform
book
React学习手册
by
Alex Banks
,
Eve Porcello
December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
China Electric Power Press Ltd.
Content preview from
React学习手册
组件扩展
|
165
外一个
React
组件。通常,
HOC
会使用一个能够维护
State
或者包含若干功能的类来包
装输入的组件。高阶组件是组件之间功能复用的最佳方式。
不兼容
Mixin
直到
React v0.13
版本,给
React
组件集成新功能的最佳方式都是采用
Mixin
技术。
Mixin
是通过创建一个可以被当作可配置属性的类来直接给组件添加功能的。用
户仍然可以通过
React.createClass
使用
Mixin
技术,不过
ES6
的类和无状态函数
式组件并没有为该技术提供支持。将来版本的
React
也不会再支持该技术。
一个
HOC
允许我们使用其他组件包装一个组件。父组件可以保留
State
或者将若干功能
作为属性向下传递给合成的组件。合成的组件并不需要知道任何与
HOC
代码实现有关
的信息,除了它提供的属性和方法的名称。
看一下
PeopleList
这个组件。它从一个
API
中载入若干随机用户,然后渲染了一个成
员名称的列表。当载入用户时,会显示一个正在载入的提示信息。一旦用户载入完
毕,他们将会被显示在
DOM
上:
import { Component } from 'react'
import { render } from 'react-dom'
import fetch from 'isomorphic-fetch'
class PeopleList extends Component {
constructor(props) {
super(props)
this.state = {
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Publisher Resources
ISBN: 9787519814236