javascript - 如何使用 jquery Ajax 和 json 数据将标签包装在 for 循环内？

Question

我使用 jQuery 练习 Ajax。

我现在正在研究如何使用 jQuery for 循环输出 json 数据。如何输出标签，甚至将标签包装在 for 循环内？

HTML 标签如下所示:

<main>
  <h1>Ajax</h1>
  <div id="output">
    <h2>Title</h2>
    <h2>Title</h2>
    <div class="block"></div>
    <div class="wrap">
      <div class="card"></div>
      <h3>Card Title</h3>
      <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
      <p>Text</p>
      <h3>Card Title</h3>
      <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
      <p>Text</p>
      <h3>Card Title</h3>
      <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
      <p>Text</p>
    </div>
    <div class="block"></div>
    <div class="wrap">
      <div class="card"></div>
      <h3>Card Title</h3>
      <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
      <p>Text</p>
      <h3>Card Title</h3>
      <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
      <p>Text</p>
      <h3>Card Title</h3>
      <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
      <p>Text</p>
    </div>
  </div><!-- /#output -->
</main>

但我想包装 block、card div 标签以在其中包含 h3 .etc 标签。 理想情况下，我希望 html 是这样的:

<main>
  <h1>Ajax</h1>
  <div id="output">
    <div class="block">
      <h2>Title</h2>
      <div class="wrap">
        <div class="card">
          <h3>Card Title</h3>
          <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
          <p>Text</p>
        </div>
        <div class="card">
          <h3>Card Title</h3>
          <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
          <p>Text</p>
        </div>
        <div class="card">
          <h3>Card Title</h3>
          <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
          <p>Text</p>
        </div>
      </div>
    </div>
    <div class="block">
      <h2>Title</h2>
      <div class="wrap">
        <div class="card">
          <h3>Card Title</h3>
          <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
          <p>Text</p>
        </div>
        <div class="card">
          <h3>Card Title</h3>
          <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
          <p>Text</p>
        </div>
        <div class="card">
          <h3>Card Title</h3>
          <p><img src="https://picsum.photos/200/100" alt="Alt"></p>
          <p>Text</p>
        </div>
      </div>
    </div>
  </div><!-- /#output -->
</main>

请帮忙。 预先感谢您。

// $.getJSON("data.json", function(data) {
var data = [{
    "title": "Title",
    "content": [
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" }
    ]
},
{
    "title": "Title",
    "content": [
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" }
    ]
}];

for (var i in data) {
  const output = $('#output');
  const block = $('<div class="block"></div>');
  const wrap = $('<div class="wrap"></div>');
  const card = $(wrap).append('<div class="card"></div>');

  $(output).append(block).prepend('<h2>' + data[i].title + '</h2>').append(wrap);

  for (var j in data[i].content) {
    $(card).append('<h3>' + data[i].content[j].card + '</h3>')
      .append('<p><img src="' + data[i].content[j].img + '" alt="' + data[i].content[j].alt + '">' + '</p>')
      .append('<p>' + data[i].content[j].text + '</p>');
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

#output {
  text-align: center;
}

.block {
  margin: 50px auto;
}

.wrap {
  padding: 20px;
  display: flex;
  justify-content: space-around;
  background-color: #f8f8f8;
}

.card {
  padding: 30px 20px;
  background-color: lavenderblush;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<main>
  <h1>Ajax</h1>
  <div id="output">
  </div>
</main>

Answer 1

只是您的附加顺序存在一些问题。检查更正:

// $.getJSON("data.json", function(data) {
var data = [{
    "title": "Title",
    "content": [
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" }
    ]
},
{
    "title": "Title",
    "content": [
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" },
        { "card": "Card Title", "text": "Text", "img": "https://picsum.photos/200/100", "alt": "Alt" }
    ]
}];

for (var i in data) {
  const output = $('#output')
  , block = $('<div class="block"></div>')
  , wrap = $('<div class="wrap"></div>')
  

  for (var j in data[i].content) {
    const card = $('<div class="card"></div>');
      card
      .append('<h3>' + data[i].content[j].card + '</h3>')
      .append('<p><img src="' + data[i].content[j].img + '" alt="' + data[i].content[j].alt + '">' + '</p>')
      .append('<p>' + data[i].content[j].text + '</p>');
      wrap.append(card);
  }
      
  
  block.append('<h2>' + data[i].title + '</h2>');
  block.append(wrap);  
  output.append(block);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

#output {
  text-align: center;
}

.block {
  margin: 50px auto;
}

.wrap {
  padding: 20px;
  display: flex;
  justify-content: space-around;
  background-color: #f8f8f8;
}

.card {
  padding: 30px 20px;
  background-color: lavenderblush;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<main>
  <h1>Ajax</h1>
  <div id="output">
  </div>
</main>