javascript - TypeError 这是未定义的原因，使用 primereact

Question

我正在尝试在我的项目中使用 PrimeReact 的编辑器组件

import React from 'react';
import Editor from './editor/Editor';

const header = (
    <span className="ql-formats">
        <button className="ql-bold" aria-label="Bold"></button>
        <button className="ql-italic" aria-label="Italic"></button>
        <button className="ql-underline" aria-label="Underline"></button>
    </span>
);

function Admin() {
    return(
        <div className="Admin">
        <header className="App-header">
            <Editor style={{height:'320px'}} value={this.state.text.bind(this)} onTextChange={(e) => this.setState({text: e.htmlValue}).bind(this)} />
        </header>
        </div>
    );
}

但是当我运行此代码时，出现以下错误

TypeError: this is undefined

Answer 1

您使用函数组件而不是类组件 请阅读Function component vs class component

Function component vs class component 2

对于快捷方式解决方案，请使用 useState

import React, {useState} from 'react'; //import useState
import Editor from './editor/Editor';

const header = (
    <span className="ql-formats">
        <button className="ql-bold" aria-label="Bold"></button>
        <button className="ql-italic" aria-label="Italic"></button>
        <button className="ql-underline" aria-label="Underline"></button>
    </span>
);

function Admin() {
const [text,setText] = useState('') 
    return(
        <div className="Admin">
        <header className="App-header">
            <Editor style={{height:'320px'}} value={text} onTextChange={(e) => setText({text: e.htmlValue}).bind(this)} />
        </header>
        </div>
    );
}