@@ -1 +1,245 @@
-console.log("식사좀 합시다.");
+import React, { Component } from 'react';
+
+import { getProducts, getReviews, getMenus } from '../api';
+
+import TopMenuNav from './TopMenuNav';
+import LikeBtn from '../../../components/LikeBtn/LikeBtn';
+import Review from './Review';
+
+import './Detail.scss';
+
+class Detail extends Component {
+  testIdNum = 1;
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      product: {},
+      reviewList: [],
+      menuList: [],
+      reviewInputVal: '',
+    };
+  }
+
+  handleReviewInput = event => {
+    const { key } = event;
+    const { value } = event.target;
+    const { reviewList } = this.state;
+
+    if (key === 'Enter' && value !== '') {
+      let newReview = {
+        userId: 'test' + this.testIdNum,
+        text: value,
+        isDeleted: false,
+        isLiked: false,
+      };
+      const newReviewList = [...reviewList];
+      newReviewList.push(newReview);
+
+      this.setState({
+        reviewInputVal: '',
+        reviewList: newReviewList,
+      });
+      this.testIdNum++;
+    }
+  };
+
+  getReviewInputVal = event => {
+    const { value } = event.target;
+    this.setState({ reviewInputVal: value });
+  };
+
+  handleDelReviewBtn = userId => {
+    const { reviewList } = this.state;
+    const updatedReviewList = [...reviewList];
+    for (let review of updatedReviewList) {
+      if (userId === review.userId) {
+        review.isDeleted = true;
+      }
+    }
+    this.setState({ reviewList: updatedReviewList });
+  };
+
+  getNotDeletedReviews = () => {
+    const { reviewList } = this.state;
+    const notDelReviewList = [];
+    for (let review of reviewList) {
+      if (!review.isDeleted) {
+        notDelReviewList.push(review);
+      }
+    }
+    return notDelReviewList;
+  };
+
+  isProductLiked = isLiked => {
+    const { product } = this.state;
+    const updatedProduct = { ...product };
+    updatedProduct.isLiked = isLiked;
+    this.setState({ product: updatedProduct });
+  };
+
+  isReviewLiked = (userId, isLiked) => {
+    const { reviewList } = this.state;
+    const updatedReviewList = [...reviewList];
+    for (let review of updatedReviewList) {
+      if (userId === review.userId) {
+        review.isLiked = isLiked;
+      }
+    }
+    this.setState({ reviewList: updatedReviewList });
+  };
+
+  async componentDidMount() {
+    // console.time('소요시간');
+    // Promise.all([
+    //   fetch('http://localhost:3000/data/detailMockData.json'),
+    //   fetch('http://localhost:3000/data/reviewListMockData.json'),
+    //   fetch('http://localhost:3000/data/menuListMockData.json'),
+    // ])
+    //   .then(([res1, res2, res3]) =>
+    //     Promise.all([res1.json(), res2.json(), res3.json()])
+    //   )
+    //   .then(([data1, data2, data3]) => {
+    //     this.setState({
+    //       product: data1.data[0],
+    //       reviewList: data2.reviews,
+    //       menuList: data3.menus,
+    //     });
+    //   });
+    // console.timeEnd('소요시간');
+    try {
+      const jsonData = await Promise.all([
+        getProducts(),
+        getReviews(),
+        getMenus(),
+      ]);
+      this.setState({ product: jsonData[0].data[0] });
+      this.setState({ reviewList: jsonData[1].reviews });
+      this.setState({ menuList: jsonData[2].menus });
+    } catch (err) {
+      new Error('Failed to set state');
+    }
+  }
+
+  render() {
+    const {
+      handleReviewInput,
+      getReviewInputVal,
+      handleDelReviewBtn,
+      getNotDeletedReviews,
+      isProductLiked,
+      isReviewLiked,
+    } = this;
+    const { product, menuList, reviewInputVal } = this.state;
+
+    let currentMenu;
+    for (let menu of menuList) {
+      if (menu.name === product.name) {
+        currentMenu = menu;
+      }
+    }
+
+    return (
+      <div className="Detail">
+        {/* <TopNav /> */}
+        <section className="detail-section">
+          <article>
+            <div className="detail-category">
+              <h2 className="category-title">{product.catecory}</h2>
+              <div className="category-nav">
+                <TopMenuNav {...currentMenu} menuList={menuList} />
+              </div>
+            </div>
+            <div className="detail-content">
+              <div className="detail-img-wrap">
+                <img alt={product.name} src={product.imgUrl} />
+              </div>
+              <div className="detail-text-wrap">
+                <div className="detail-text">
+                  <h3 className="product-name-kr">
+                    {product.name}
+                    <br />
+                    <span className="product-name-en">{product.engName}</span>
+                  </h3>
+                  <LikeBtn
+                    whoseBtn="product"
+                    handler={isProductLiked}
+                    isLiked={product.isLiked}
+                  />
+                  <p className="product-description">{product.summary}</p>
+                </div>
+                <div className="product-info">
+                  <div className="product-info-head">
+                    <p className="info-head-text">제품 영양 정보</p>
+                    <p className="info-head-text">{product.servingSize}</p>
+                  </div>
+                  <div className="product-info-content">
+                    <table>
+                      <tbody>
+                        <tr>
+                          <td>1회 제공량 (kcal)</td>
+                          <td className="align-right padding-right">
+                            {product.kcal}
+                          </td>
+                          <td className="dashed-border">나트륨 (mg)</td>
+                          <td className="align-right">{product.natrium}</td>
+                        </tr>
+                        <tr>
+                          <td>포화지방 (g)</td>
+                          <td className="align-right padding-right">
+                            {product.fat}
+                          </td>
+                          <td className="dashed-border">당류 (g)</td>
+                          <td className="align-right">{product.sugars}</td>
+                        </tr>
+                        <tr>
+                          <td>단백질 (g)</td>
+                          <td className="align-right padding-right">
+                            {product.protein}
+                          </td>
+                          <td className="dashed-border">카페인 (mg)</td>
+                          <td className="align-right">{product.caffeine}</td>
+                        </tr>
+                      </tbody>
+                    </table>
+                  </div>
+                  <div className="allergens-wrap">
+                    <p>알레르기 유발 요인 : {product.allergen}</p>
+                  </div>
+                </div>
+                <div className="detail-review">
+                  <h2 className="category-title review-title">리뷰</h2>
+                  <ul className="review-list">
+                    {getNotDeletedReviews().map(review => {
+                      return (
+                        <Review
+                          key={review.userId}
+                          {...review}
+                          isReviewLiked={isReviewLiked}
+                          handleDelReviewBtn={handleDelReviewBtn}
+                        />
+                      );
+                    })}
+                  </ul>
+                  <div className="review-input-wrap">
+                    <input
+                      className="review-input"
+                      placeholder="리뷰를 입력해주세요."
+                      type="text"
+                      value={reviewInputVal}
+                      onChange={getReviewInputVal}
+                      onKeyPress={handleReviewInput}
+                    />
+                  </div>
+                </div>
+              </div>
+            </div>
+          </article>
+        </section>
+        {/* <Footer /> */}
+      </div>
+    );
+  }
+}
+
+export default Detail;

리뷰: 구조분해 할당이 잘못되서 state를 전체 다 return하고 있습니다.
이 함수의 목적은 무엇인가요?