循环遍历 JSON 数据以生成 HTML

Question

我有如下所示的 JSON 数据：

 data = {
  "tennis": [{
    "Description": "Insert description here.",
    "Price": 379.99,
    "ProductName": "Babolat Play Pure Drive",
  }, {
    "Description": "Insert description here.",
    "Price": 199.99,
    "ProductName": "Yonex AI 98 Tennis Racquet",
  }],
  "basketball": [{
    "Description": "Insert description here.",
    "Price": 64.99,
    "ProductName": "Wilson NCAA Solution Official Game Basketball",
  }, {
    "Description": "Insert description here.",
    "Price": 59.99,
    "ProductName": "Spalding NBA NeverFlat Size 7 Composite Leather Basketball",
  }]
}

我正在使用这些数据生成 HTML，因此它看起来格式正确并且对用户来说易于阅读。我这样做的方法是创建一个 for 循环来阅读网球和篮球类别。例如：

 for (var i = 0; i < data.tennis.length; i++) {
  tennisProducts.push(data.tennis[i]);
  var tennisProductsTitle = tennisProducts[i].ProductName;
  var tennisProductsDescription = tennisProducts[i].Description;
  var tennisProductsPrice = tennisProducts[i].Price;
  var badge = document.createElement('div');
  badge.className = 'badge';
  badge.innerHTML =
    '<h1>' + tennisProductsTitle + '</h1>' +
    '<h2>' + tennisProductsDescription + '</h1>' +
    '<div class="options-only-phone">' +
    '<a class="service-provider-call" href="#" target="_blank"> Buy for $' + tennisProductsPrice + '</a>';
  document.getElementById('tennis-products-list').appendChild(badge);
}

如何创建一个可以读取两个（或多个）类别的 for 循环？

这是我在这个 JSFiddle 中的工作示例： https ://jsfiddle.net/dsk1279b/1

原文由 kaoscify 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

双循环，一个迭代对象属性，下一个迭代数组：

 for (var key in data) {
    for (var i = 0; i < data[key].length; i++) {
        //HTML logic
    }
}

最终代码：

 for (var key in data) {
    for (var i = 0; i < data[key].length; i++) {
        var title = data[key][i].ProductName;
        var desc = data[key][i].Description;
        var price = data[key][i].Price;
        var badge = document.createElement('div');
        badge.className = 'badge';
        badge.innerHTML =
            '<h1>' + title + '</h1>' +
            '<h2>' + desc + '</h1>' +
            '<div class="options-only-phone">' +
            '<a class="service-provider-call" href="#" target="_blank"> Buy for $' + price + '</a>';
        //I gave the div the same ID's as the keys in the object for ease
        document.getElementById(key).appendChild(badge);
    }
}

 data = {
  "tennis": [{
    "Description": "Insert description here.",
    "Price": 379.99,
    "ProductName": "Babolat Play Pure Drive",
  }, {
    "Description": "Insert description here.",
    "Price": 199.99,
    "ProductName": "Yonex AI 98 Tennis Racquet",
  }],
  "basketball": [{
    "Description": "Insert description here.",
    "Price": 64.99,
    "ProductName": "Wilson NCAA Solution Official Game Basketball",
  }, {
    "Description": "Insert description here.",
    "Price": 59.99,
    "ProductName": "Spalding NBA NeverFlat Size 7 Composite Leather Basketball",
  }]
}

for (var key in data) {
  for (var i = 0; i < data[key].length; i++) {
    var title = data[key][i].ProductName;
    var desc = data[key][i].Description;
    var price = data[key][i].Price;
    var badge = document.createElement('div');
    badge.className = 'badge';
    badge.innerHTML =
      '<h1>' + title + '</h1>' +
      '<h2>' + desc + '</h1>' +
      '<div class="options-only-phone">' +
      '<a class="service-provider-call" href="#" target="_blank"> Buy for $' + price + '</a>';
    document.getElementById(key).appendChild(badge);
  }
}

 body {
  font-family: Arial, sans-serif;
  line-height: 125%;
}

h1 {
  font-size: 0.875em;
  padding: 0;
  margin: 0;
}

h2,
a {
  font-size: 0.750em;
  padding: 0;
  margin: 0;
  font-weight: normal;
}

a:hover {
  text-decoration: none;
}

.badge {
  border-radius: 2px;
  border: 1px solid rgba(0, 0, 0, 0.15);
  padding: 12px;
  margin: 12px 0;
}

.badge:hover {
  border: 1px solid rgba(0, 0, 0, 0.3);
}

 <div id="tennis">

</div>

<hr>

<div id="basketball">

</div>

原文由 tymeJV 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

使用 category 作为属性将数据展平为单个值数组：

 var _data = Object.keys(data).reduce(
              (m,c) => m.concat(data[c].map(
                (i) => (i.category = c) && i))
           , []);

console.log(_data);

为 UI 使用扁平数组：

 _data.forEach((d) => {
  var badge = document.createElement('div');
  badge.className = 'badge';
  badge.innerHTML = [
    '<h1>',
    d.ProductName,
    '</h1><h2>',
    d.Description,
    '</h1><div class="options-only-phone">',
    '<a class="service-provider-call" href="#" target="_blank"> Buy for $',
    d.Price,
    '</a>'].join('');
  document.getElementById(d.category + '-products-list').appendChild(badge);
})

 'use strict';
var data = {
  "tennis": [{
    "Description": "Insert description here.",
    "Price": 379.99,
    "ProductName": "Babolat Play Pure Drive",
  }, {
    "Description": "Insert description here.",
    "Price": 199.99,
    "ProductName": "Yonex AI 98 Tennis Racquet",
  }],
  "basketball": [{
    "Description": "Insert description here.",
    "Price": 64.99,
    "ProductName": "Wilson NCAA Solution Official Game Basketball",
  }, {
    "Description": "Insert description here.",
    "Price": 59.99,
    "ProductName": "Spalding NBA NeverFlat Size 7 Composite Leather Basketball",
  }]
}

var _data = Object.keys(data).reduce((m,c) => m.concat(data[c].map((i) => (i.category = c) && i) ), []);

console.log(_data);

_data.forEach((d) => {
  var badge = document.createElement('div');
  badge.className = 'badge';
  badge.innerHTML = [
    '<h1>',
    d.ProductName,
    '</h1><h2>',
    d.Description,
    '</h1><div class="options-only-phone">',
    '<a class="service-provider-call" href="#" target="_blank"> Buy for $',
    d.Price,
    '</a>'].join('');
  document.getElementById(d.category + '-products-list').appendChild(badge);
})

 body {
  font-family: Arial, sans-serif;
  line-height: 125%;
}

h1 {
  font-size: 0.875em;
  padding: 0; margin: 0;
}

h2, a {
  font-size: 0.750em;
  padding: 0; margin: 0;
  font-weight: normal;
}

a:hover {
  text-decoration: none;
}

.badge {
  border-radius: 2px;
  border: 1px solid rgba(0, 0, 0, 0.15);
  padding: 12px;
  margin: 12px 0;
}

.badge:hover {
    border: 1px solid rgba(0, 0, 0, 0.3);
}

 <div id="tennis-products-list">

</div>

<hr>

<div id="basketball-products-list">

</div>

原文由 Malk 发布，翻译遵循 CC BY-SA 4.0 许可协议