JavaScript动态内容更新：解决图片元素未刷新的命名冲突问题

// local reviews data
const reviews = [
  // ... (review objects) ...
];

const person = document.querySelector("#person-img"); // 全局引用图片DOM元素
const author = document.querySelector("#author");
const job = document.querySelector("#job");
const info = document.querySelector("#info");

let number = 0; // 当前评论索引

// 页面加载时初始化显示
window.addEventListener('DOMContentLoaded', function() {
  const item = reviews[number];
  person.src = item.img;
  author.innerHTML = item.name;
  job.innerHTML = item.job;
  info.innerHTML = item.text;
});

// 核心更新函数
function showPerson(person) { // 注意：这里的参数名也是 'person'
  const item = reviews[person]; // 'person' 参数在这里被用作索引
  person.src = item.img; // 尝试设置 'person' 的 src 属性
  author.innerHTML = item.name;
  job.innerHTML = item.job;
  info.innerHTML = item.text;
}

// 按钮事件监听器
nextBtn.addEventListener("click", function() {
  number++;
  if(number > reviews.length - 1) {
    number = 0;
  }
  showPerson(number); // 传入索引 'number'
});

prevBtn.addEventListener("click", function() {
  number--;
  if(number < 0) {
    number = reviews.length - 1;
  }
  showPerson(number); // 传入索引 'number'
});

randomBtn.addEventListener("click", function() {
  number = Math.floor(Math.random() * reviews.length);
  showPerson(number); // 传入索引 'number'
});

function showPerson(index) { // 将参数名从 'person' 改为 'index'
  const item = reviews[index]; // 使用新的参数名 'index' 作为数组索引
  person.src = item.img; // 现在 'person' 正确地引用了全局的 <img> DOM元素
  author.innerHTML = item.name;
  job.innerHTML = item.job;
  info.innerHTML = item.text;
}

// local reviews data
const reviews = [
  {
    id: 1,
    name: "susan smith",
    job: "web developer",
    img:
      "https://res.cloudinary.com/diqqf3eq2/image/upload/v1586883334/person-1_rfzshl.jpg",
    text:
      "I'm baby meggings twee health goth +1. Bicycle rights tumeric chartreuse before they sold out chambray pop-up. Shaman humblebrag pickled coloring book salvia hoodie, cold-pressed four dollar toast everyday carry",
  },
  {
    id: 2,
    name: "anna johnson",
    job: "web designer",
    img:
      "https://res.cloudinary.com/diqqf3eq2/image/upload/v1586883409/person-2_np9x5l.jpg",
    text:
      "Helvetica artisan kinfolk thundercats lumbersexual blue bottle. Disrupt glossier gastropub deep v vice franzen hell of brooklyn twee enamel pin fashion axe.photo booth jean shorts artisan narwhal.",
  },
  {
    id: 3,
    name: "peter jones",
    job: "intern",
    img:
      "https://res.cloudinary.com/diqqf3eq2/image/upload/v1586883417/person-3_ipa0mj.jpg",
    text:
      "Sriracha literally flexitarian irony, vape marfa unicorn. Glossier tattooed 8-bit, fixie waistcoat offal activated charcoal slow-carb marfa hell of pabst raclette post-ironic jianbing swag.",
  },
  {
    id: 4,
    name: "bill anderson",
    job: "the boss",
    img:
      "https://res.cloudinary.com/diqqf3eq2/image/upload/v1586883423/person-4_t9nxjt.jpg",
    text:
      "Edison bulb put a bird on it humblebrag, marfa pok pok heirloom fashion axe cray stumptown venmo actually seitan. VHS farm-to-table schlitz, edison bulb pop-up 3 wolf moon tote bag street art shabby chic. ",
  },
];

// 获取DOM元素引用
const person = document.querySelector("#person-img");
const author = document.querySelector("#author");
const job = document.querySelector("#job");
const info = document.querySelector("#info");

const prevBtn = document.querySelector(".prev-btn");
const nextBtn = document.querySelector(".next-btn");
const randomBtn = document.querySelector(".randomBtn");

let number = 0; // 当前评论的索引

// 页面加载完成时，显示第一个评论
window.addEventListener('DOMContentLoaded', function() {
  const item = reviews[number];
  person.src = item.img;
  author.innerHTML = item.name;
  job.innerHTML = item.job;
  info.innerHTML = item.text;
});

// 根据给定的索引显示评论信息
function showPerson(index) { // 参数名修改为 'index'
  const item = reviews[index];
  person.src = item.img; // 正确引用全局的 <img> 元素
  author.innerHTML = item.name;
  job.innerHTML = item.job;
  info.innerHTML = item.text;
}

// “下一位”按钮事件监听器
nextBtn.addEventListener("click", function() {
  number++;
  if(number > reviews.length - 1) {
    number = 0; // 循环到第一个
  }
  showPerson(number);
});

// “上一位”按钮事件监听器
prevBtn.addEventListener("click", function() {
  number--;
  if(number < 0) {
    number = reviews.length - 1; // 循环到最后一个
  }
  showPerson(number);
});

// “随机”按钮事件监听器
randomBtn.addEventListener("click", function() {
  number = Math.floor(Math.random() * reviews.length);
  showPerson(number);
});