react-pdf - 错误:目标容器不是 DOM 元素

Question

我正在使用带有 react-pdf 的 React 并尝试将 PDF 渲染到我的模态中。 但是，我的模式在单击按钮时加载，因此不会在应用加载时加载。 但它试图在应用程序加载时调用 PDF 渲染调用，从而生成错误："错误：目标容器不是 DOM 元素"。 我不确定如何解决此问题。

这是我的整个模态组件：

import ReactModal from 'react-modal';
import React, { useEffect, useRef } from 'react';
import ReactDOM from 'react-dom';
import PropTypes from 'prop-types';
import ReactPDF, { PDFViewer } from '@react-pdf/renderer';
import CloseButton from './CloseButton';
import MessageHub from '../message/MessageHub';
import PDFPlacard from '../placards/PDFPlacard';
const PDF = () => (
<PDFViewer>
<PDFPlacard />
</PDFViewer>
);
const PlacardsModal = (props) => {
const { openPlacards, setOpenPlacards, customStyles } = props;
const numPlacards = React.createRef();
const ref = useRef(null);
// this call needs to happen after the modal and #PDFPlacard is rendered
ReactDOM.render(<PDF />, document.getElementById('PDFPlacard'));
const handleSubmit = (evt) => {
evt.preventDefault();
if (numPlacards.current.value === '') {
ref.current('Please fill in the number of placards.');
} else {
// submit form
}
};
return (
<ReactModal
isOpen={openPlacards}
style={customStyles}
className={'print-placards-modal'}
closeTimeoutMS={1000}
>
<CloseButton setOpenModal={setOpenPlacards} />
<h2>Print Placards</h2>
{/* eslint-disable-next-line react/no-children-prop */}
<MessageHub children={(add) => (ref.current = add)} />
<form className={'form'} onSubmit={handleSubmit}>
<div className={'form-group row'}>
<label
htmlFor={'numPlacards'}
className={'col-sm-6 col-form-label'}
>
Number of Placards:
</label>
<div className={'col-sm-6'}>
<input
id={'numPlacards'}
type={'number'}
className={'form-control'}
ref={numPlacards}
/>
</div>
</div>
<button
className={'btn btn-primary d-block mx-auto mb-2'}
type={'submit'}
value={'Print'}
/>
</form>
<div id={'PDFPlacard'} />
</ReactModal>
);
};
PlacardsModal.propTypes = {
openPlacards: PropTypes.bool,
setOpenPlacards: PropTypes.func,
customStyles: PropTypes.object,
title: PropTypes.string
};
export default PlacardsModal;

以下是PDFPlacard.js：

import React from 'react';
import {
Page,
Text,
View,
Document,
StyleSheet
} from '@react-pdf/renderer';
// Create styles
const styles = StyleSheet.create({
page: {
flexDirection: 'row',
backgroundColor: '#E4E4E4'
},
section: {
margin: 10,
padding: 10,
flexGrow: 1
}
});
// Create Document Component
const PDFPlacard = (type) => (
<Document>
<Page size="letter" style={styles.page}>
<View style={styles.section}>
<Text>Section #1</Text>
</View>
<View style={styles.section}>
<Text>Section #2</Text>
</View>
</Page>
</Document>
);
export default PDFPlacard;

而我的索引.js：

import React from 'react';
import { render } from 'react-dom';
import 'bootstrap/dist/css/bootstrap.min.css';
import 'bootstrap/dist/js/bootstrap.min';
import './index.css';
import App from './App';
const title = 'title';
render(<App title={title} />, document.getElementById('root'));
// eslint-disable-next-line no-undef
module.hot.accept();

父级正在像这样加载标牌模态：

...
<button
className={'btn btn-info mb-3'}
onClick={() => setOpenPlacards(true)}
>
Placards
</button>
...
<PlacardsModal
openPlacards={openPlacards}
setOpenPlacards={setOpenPlacards}
customStyles={customStyles}
/>

Answer 1

终于从另一个来源得到了答案。 我根本不应该打那个ReactDOM.render(电话。 我应该在我的页面上包含PDF组件。 喜欢这个：

...
<button
className={'btn btn-primary d-block mx-auto mb-2'}
type={'submit'}
value={'Print'}
/>
</form>
<!-- not this -->
<div id={'PDFPlacard'} />
<!-- this -->
<PDF />
</ReactModal>
);
};
...