公共文件夾中的圖像未顯示在反應項目中

Question

我看不到圖像，我已在菜單組件中呈現它，如下面的屏幕截圖所示。 有人能看出問題所在嗎？ 我的圖像文件夾位於公共文件夾中。

import React, { useState } from 'react';
import Menu from './Menu';
import Categories from './Categories';
import items from './data';


function App() {
  const [menuItems ,setMenuItems] = useState(items)
  const [categories,setCategories] = useState([])

  const filterItems = (category) => {
    if(category === "all"){
      setMenuItems(items)
      return;
    }
    const newItems  = items.filter((item) => item.category === category)

    setMenuItems(newItems)

  }

  return <main>
              <section className="menu section">
                <div className="title">
                  <h2>Menu</h2>
                  <div className="underline"></div>
                </div>
                <Categories categories = {categories} filterItems ={filterItems} />
                <Menu items={menuItems}/>
              </section>


  </main>;
}

export default App;
import React from 'react';


const Menu = ({items}) => {
  return(<div className = "section-center">
  {items.map((menuItem) => {
    const {id,title,img,desc,price} = menuItem;
    return (<article key ={id} className = "menu-item">

      <img src = {img} alt = {title} className = "photo"></img>
      <div className="item-info">
        <header>
          <h4>{title}</h4>
          <h4 className="price">${price}</h4>
        </header>
        <p className = "item-text">{desc}</p>
      </div>

    </article>)
  })}


</div>)}



export default Menu;



import React from 'react'
const Categories= ({filterItems}) => {
return(
  <div className='btn-container'>
    <button className='filter-btn' onClick={() => filterItems( 'all' )}>All</button>
 
      <button className='filter-btn' onClick={() => filterItems( 'breakfast' )}>Breakfast</button>
    
      <button className='filter-btn' onClick={() => filterItems( 'lunch' )}>Lunch</button>
    
      <button className='filter-btn' onClick={() => filterItems( 'shakes' )}>Shakes</button>
    </div>

)

}

export  default Categories

const menu = [
  {
    id: 1,
    title: 'buttermilk pancakes',
    category: 'breakfast',
    price: 15.99,
    img: './images/item-1.jpeg',
    desc: `I'm baby woke mlkshk wolf bitters live-edge blue bottle, hammock freegan copper mug whatever cold-pressed `,
  },
  {
    id: 2,
    title: 'diner double',
    category: 'lunch',
    price: 13.99,
    img: './images/item-2.jpeg',
    desc: `vaporware iPhone mumblecore selvage raw denim slow-carb leggings gochujang helvetica man braid jianbing. Marfa thundercats `,
  },
  {
    id: 3,
    title: 'godzilla milkshake',
    category: 'shakes',
    price: 6.99,
    img: './images/item-3.jpeg',
    desc: `ombucha chillwave fanny pack 3 wolf moon street art photo booth before they sold out organic viral.`,
  },
  {
    id: 4,
    title: 'country delight',
    category: 'breakfast',
    price: 20.99,
    img: './images/item-4.jpeg',
    desc: `Shabby chic keffiyeh neutra snackwave pork belly shoreditch. Prism austin mlkshk truffaut, `,
  },
  {
    id: 5,
    title: 'egg attack',
    category: 'lunch',
    price: 22.99,
    img: './images/item-5.jpeg',
    desc: `franzen vegan pabst bicycle rights kickstarter pinterest meditation farm-to-table 90's pop-up `,
  },
  {
    id: 6,
    title: 'oreo dream',
    category: 'shakes',
    price: 18.99,
    img: './images/item-6.jpeg',
    desc: `Portland chicharrones ethical edison bulb, palo santo craft beer chia heirloom iPhone everyday`,
  },
  {
    id: 7,
    title: 'bacon overflow',
    category: 'breakfast',
    price: 8.99,
    img: './images/item-7.jpeg',
    desc: `carry jianbing normcore freegan. Viral single-origin coffee live-edge, pork belly cloud bread iceland put a bird `,
  },
  {
    id: 8,
    title: 'american classic',
    category: 'lunch',
    price: 12.99,
    img: './images/item-8.jpeg',
    desc: `on it tumblr kickstarter thundercats migas everyday carry squid palo santo leggings. Food truck truffaut  `,
  },
  {
    id: 9,
    title: 'quarantine buddy',
    category: 'shakes',
    price: 16.99,
    img: './images/item-9.jpeg',
    desc: `skateboard fam synth authentic semiotics. Live-edge lyft af, edison bulb yuccie crucifix microdosing.`,
  },
];
export default menu;

/*
=============== 
Variables
===============
*/

:root {
  /* dark shades of primary color*/
  --clr-primary-1: hsl(205, 86%, 17%);
  --clr-primary-2: hsl(205, 77%, 27%);
  --clr-primary-3: hsl(205, 72%, 37%);
  --clr-primary-4: hsl(205, 63%, 48%);
  /* primary/main color */
  --clr-primary-5: hsl(205, 78%, 60%);
  /* lighter shades of primary color */
  --clr-primary-6: hsl(205, 89%, 70%);
  --clr-primary-7: hsl(205, 90%, 76%);
  --clr-primary-8: hsl(205, 86%, 81%);
  --clr-primary-9: hsl(205, 90%, 88%);
  --clr-primary-10: hsl(205, 100%, 96%);
  /* darkest grey - used for headings */
  --clr-grey-1: hsl(209, 61%, 16%);
  --clr-grey-2: hsl(211, 39%, 23%);
  --clr-grey-3: hsl(209, 34%, 30%);
  --clr-grey-4: hsl(209, 28%, 39%);
  /* grey used for paragraphs */
  --clr-grey-5: hsl(210, 22%, 49%);
  --clr-grey-6: hsl(209, 23%, 60%);
  --clr-grey-7: hsl(211, 27%, 70%);
  --clr-grey-8: hsl(210, 31%, 80%);
  --clr-grey-9: hsl(212, 33%, 89%);
  --clr-grey-10: hsl(210, 36%, 96%);
  --clr-white: #fff;
  --clr-gold: #c59d5f;

  --clr-red-dark: hsl(360, 67%, 44%);
  --clr-red-light: hsl(360, 71%, 66%);
  --clr-green-dark: hsl(125, 67%, 44%);
  --clr-green-light: hsl(125, 71%, 66%);
  --clr-black: #222;
  --transition: all 0.3s linear;
  --spacing: 0.1rem;
  --radius: 0.25rem;
  --light-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  --dark-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  --max-width: 1170px;
  --fixed-width: 620px;
}
/*
=============== 
Global Styles
===============
*/

*,
::after,
::before {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background: var(--clr-grey-10);
  color: var(--clr-grey-1);
  line-height: 1.5;
  font-size: 0.875rem;
}
ul {
  list-style-type: none;
}
a {
  text-decoration: none;
}
h1,
h2,
h3,
h4 {
  letter-spacing: var(--spacing);
  text-transform: capitalize;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}
h1 {
  font-size: 3rem;
}
h2 {
  font-size: 2rem;
}
h3 {
  font-size: 1.25rem;
}
h4 {
  font-size: 0.875rem;
}
p {
  margin-bottom: 1.25rem;
  color: var(--clr-grey-5);
}
@media screen and (min-width: 800px) {
  h1 {
    font-size: 4rem;
  }
  h2 {
    font-size: 2.5rem;
  }
  h3 {
    font-size: 1.75rem;
  }
  h4 {
    font-size: 1rem;
  }
  body {
    font-size: 1rem;
  }
  h1,
  h2,
  h3,
  h4 {
    line-height: 1;
  }
}
/*  global classes */

/* section */
.section {
  width: 90vw;
  margin: 0 auto;
  max-width: var(--max-width);
}

@media screen and (min-width: 992px) {
  .section {
    width: 95vw;
  }
}

/*
=============== 
Menu
===============
*/

.menu {
  padding: 5rem 0;
}
.title {
  text-align: center;
  margin-bottom: 2rem;
}
.underline {
  width: 5rem;
  height: 0.25rem;
  background: var(--clr-gold);
  margin-left: auto;
  margin-right: auto;
}
.btn-container {
  margin-bottom: 4rem;
  display: flex;
  justify-content: center;
}
.filter-btn {
  background: transparent;
  border-color: transparent;
  font-size: 1rem;
  text-transform: capitalize;
  margin: 0 0.5rem;
  letter-spacing: 1px;
  padding: 0.375rem 0.75rem;
  color: var(--clr-gold);
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius);
}
.filter-btn:hover {
  background: var(--clr-gold);
  color: var(--clr-white);
}
.section-center {
  width: 90vw;
  margin: 0 auto;
  max-width: 1170px;
  display: grid;
  gap: 3rem 2rem;
  justify-items: center;
}
.menu-item {
  display: grid;
  gap: 1rem 2rem;
  max-width: 25rem;
}
.photo {
  object-fit: cover;
  height: 200px;
  width: 100%;
  border: 0.25rem solid var(--clr-gold);
  border-radius: var(--radius);
  display: block;
}
.item-info header {
  display: flex;
  justify-content: space-between;
  border-bottom: 0.5px dotted var(--clr-grey-5);
}
.item-info h4 {
  margin-bottom: 0.5rem;
}
.price {
  color: var(--clr-gold);
}
.item-text {
  margin-bottom: 0;
  padding-top: 1rem;
}

@media screen and (min-width: 768px) {
  .menu-item {
    grid-template-columns: 225px 1fr;
    gap: 0 1.25rem;
    max-width: 40rem;
  }
  .photo {
    height: 175px;
  }
}
@media screen and (min-width: 1200px) {
  .section-center {
    width: 95vw;
    grid-template-columns: 1fr 1fr;
  }
  .photo {
    height: 150px;
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>

在此處輸入圖像描述

Answer 1

這是因為您在這里傳遞了圖像的相對路徑：

{
    id: 1,
    title: 'buttermilk pancakes',
    category: 'breakfast',
    price: 15.99,
    img: './images/item-1.jpeg', // <--- here
    desc: `I'm baby woke mlkshk wolf bitters live-edge blue bottle, hammock freegan copper mug whatever cold-pressed `,
},

相反，您應該做的是傳遞一個可以在您的瀏覽器中使用的路徑（因此該位置應該相對於您的public目錄而不是您的MyComponent.jsx文件寫入）。 這是因為您沒有將圖像導入組件，而是將它們加載到瀏覽器中。

假設您的項目結構如下：

root
├── node_modules
├── public
│   └── images
│       └── item-1.jpeg
│       └── etc...
└── src
    └── files...

您所有的img來源都應該刪除它們的點：

img: './images/item-1.jpeg'
      |
      v
img: '/images/item-1.jpeg'

這樣，當您在瀏覽器中打開網站時，圖像將正確加載。