我有一个简单的 react 组件,它传递一组具有一个值的对象数组,该值是另一个 react 组件,如下所示(是的,我知道这可以转换为功能组件,但这对于这个问题来说并不重要):
import React, { Component } from 'react'
import GeneralPage from 'AdminApp/client/components/conference/GeneralPage'
import TopicPage from 'AdminApp/client/components/conference/TopicPage'
import NewPage from 'common/client/components/wizard/NewPage'
export default class TestWizard extends Component {
render() {
let steps=[
{name: "One", node: GeneralPage},
{name: "Two", node: TopicPage},
{name: "Three", node: TopicPage},
]
return (
<NewPage steps={steps} name='Conference'/>
)
}
}
这在另一个组件中,恰好被包装在一个单独的 HOC 中,但 HOC 与这个问题无关,我正在创建从上面传入的组件 - React.createElement(step.node) 在下面的代码中:
import React, { Component, PropTypes } from 'react'
import {NewWrapper} from 'common/client/components/wizard/NewWrapper'
import WizardButtons from 'common/client/components/wizard/WizardButtons'
import { bindActionCreators } from 'redux'
import CONSTANTS from 'common/client/constants'
let NewPage = NewWrapper(class extends Component {
render() {
const {steps, page, name} = this.props
let stepCount = steps.length
let stepName = steps[page - 1].name
let submit = steps[page - 1].submit
let stepPreText = `${name}`
let stepPostText = ` Wizard - ${stepName} (Step ${page} of ${stepCount})`
//TODO: select with steps - if ID and/or valid?
let title = <div><h2 style={{textAlign: 'center', color: CONSTANTS.EP_COLOR_BROWN}}>
{name && stepPreText}{stepCount > 1 && stepPostText}
</h2></div>
return (
<div>
{page}
{steps.map((step, index) =>
<div key={index}>
{page === (index + 1) ? title : null}
{/* ***HERE IS WHERE THE NODES ARE ADDED *** */}
{page === (index + 1) ? React.createElement(step.node) : null}
</div>
)}
{/* ***I NEED TO ADD THIS AS A CHILD TO THE createElement *** */}
<WizardButtons submit={submit} {...this.props}/>
</div>
)
}
})
export default NewPage
我需要做但似乎不知道如何添加 <Wizard Buttons/>
上面的元素作为 createElement 的子元素。我厌倦了像 React.createElement(step.node, null, <WizardButtons submit={submit} {...this.props}/>)
这样的事情并使用向导按钮元素创建一个变量,并将该变量作为第三个参数传递给 creatElement,但似乎没有任何效果。关于如何最好地做到这一点有什么想法吗?
TIA!
最佳答案
尝试改变
let steps=[
{name: "One", node: GeneralPage},
{name: "Two", node: TopicPage},
{name: "Three", node: TopicPage},
]
至
let steps=[
{name: "One", node: <GeneralPage />},
{name: "Two", node: <TopicPage />},
{name: "Three", node: <TopicPage />},
]
还有这个
{page === (index + 1) ? React.createElement(step.node) : null}
至
{page === (index + 1) ? step.node : null}
编辑以将按钮添加到step.node
要将向导按钮添加到 step.node ...您可以做一些事情
let wizardButton = <WizardButtons submit={submit} {...this.props}/>
React.cloneElement(step.node, {wizardButton : wizardButton});
您将把它作为您的 step.node 中的 Prop
关于javascript - React createElement 子级语法,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36854758/