javascript - 如何在反应中将功能传输到功能组件

Question

我在 react 和 typescript 方面有点新，并且在将函数从文件传输App.tsx到名为WordAddingForm.tsx THANKS IN ADVANCE 的功能组件时遇到了一些问题！

所以这是我的App.tsx文件：

import React, {FC, useState} from 'react';
import WordAddingForm from './components/WordAddingForm';
import {observer} from "mobx-react-lite";
import WordService from "./services/WordService"

const App: FC = () => {

  const {store} = useContext(Context)
  const [words, setWords] = useState<IWord[]>([])
  
  async function getWords() {
    try {
      const response = await WordService.fetchWords()
      setWords(response.data)
    } catch (e) {
      console.log(e)
    }
  }

  return (
    <div>
      <div><WordAddingForm/></div>
    </div>
  )
}

export default observer(App);

我需要将功能传输getWords到组件这是我的WordAddingForm.tsx文件：

import React, {FC, useContext, useState} from 'react';
import {Context} from "../index";
import {observer} from "mobx-react-lite";
import WordService from '../services/WordService';

const WordAddingForm: FC = () => {

    const [word, setWord] = useState<string>('')
    const [wordT, setWordT] = useState<string>('')
    const [instance, setInstance] = useState<string>('')
    const [instanceT, setInstanceT] = useState<string>('')
    const {store} = useContext(Context)

    function clear():void {
        setWord('')
        setWordT('')
        setInstance('')
        setInstanceT('')
    }

    async function createWord(word:string, wordT:string, instance:string, instanceT:string) {
        try {
          const response = await store.createWord(word, wordT, instance, instanceT)
          console.log(response)
          clear()
        } catch (e) {
          console.log(e)
        }
      }

    return (
        <div>
            <input
            onChange={e => setWord(e.target.value)}
            value={word}
            type="text"
            placeholder="word"
            />
            <input
            onChange={e => setWordT(e.target.value)}
            value={wordT}
            type="text"
            placeholder="word translation"
            />
            <input
            onChange={e => setInstance(e.target.value)}
            value={instance}
            type="text"
            placeholder="instance of using this word"
            />
            <input
            onChange={e => setInstanceT(e.target.value)}
            value={instanceT}
            type="text"
            placeholder="instance translation"
            />
            <button
            onClick={() => {
                createWord(word, wordT, instance, instanceT)
                clear()
                }}>
                add word +
            </button>
        </div>
    )
}

export default observer(WordAddingForm)

而且我需要传输功能getWords以<WordAddingForm/>在此组件中使用它并在向数据库添加新单词后再次更新单词列表喜欢<WordAddingForm props={getWords}/>或<WordAddingForm {getWords}/>没有帮助

标签： javascriptreactjstypescriptreact-hookscomponents

Answer 1

<WordAddingForm getWords={getWords} />

这就是你将它传递给你的组件的方式。使用 insideWordAddingForm时，必须通过参数接收 props 对象：

interface Props {
  getWords: () => Promise<any>
}
const WordAddingForm: FC<Props> = (props) => {
// use your function as props.getWords()
}