[한입 크기로 잘라 먹는 리액트] React에서 API 호출하기

 

https://jsonplaceholder.typicode.com/

JSONPlaceholder - Free Fake REST API

 

https://jsonplaceholder.typicode.com/comments

 

 

App.js

- API 호출 코드 getData작성

- mount될 때 나와야 하는 데이터 > useEffect 사용(빈배열)

- 초기 데이터 initData 설정

import { useState, useRef, useEffect } from "react";
import "./App.css";
import DiaryEditor from "./DiaryEditor";
import DiaryList from "./DiaryList";
 
// https://jsonplaceholder.typicode.com/comments
 
function App() {
  const [data, setData] = useState([]);
 
  const dataId = useRef(0);
 
  const getData = async () => {
    const res = await fetch(
      "https://jsonplaceholder.typicode.com/comments"
    ).then((res) => res.json());
    console.log(res);
 
    const initData = res.slice(0, 20).map((it) => {
      return {
        author: it.email,
        content: it.body,
        emotion: Math.floor(Math.random() * 5) + 1,
        created_date: new Date().getTime(),
        id: dataId.current++,
      };
    });
    setData(initData);
  };
 
  useEffect(() => {
    getData();
  }, []);
 
  const onCreate = (author, content, emotion) => {
    const created_date = new Date().getTime();
 
    const newItem = {
      author,
      content,
      emotion,
      created_date,
      id: dataId.current,
    };
    dataId.current += 1;
    setData([newItem, ...data]);
  };
 
  const onRemove = (targetId) => {
    console.log(`${targetId}가 삭제되었습니다.`);
    const newDiaryList = data.filter((it) => it.id !== targetId);
    setData(newDiaryList);
  };
 
  const onEdit = (targetId, newContent) => {
    setData(
      data.map((it) =>
        it.id === targetId ? { ...it, content: newContent } : it
      )
    );
  };
 
  return (
    <div className="App">
      <DiaryEditor onCreate={onCreate} />
      <DiaryList onRemove={onRemove} diaryList={data} onEdit={onEdit} />
    </div>
  );
}
 
export default App;

 

 

 

 

 

 

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• 출처
  https://inf.run/N9fZn

한입 크기로 잘라 먹는 리액트(React.js) : 기초부터 실전까지 - 인프런 | 강의