javascript - Looping through JSON Data to Generate HTML

Question

I have JSON data that looks like this:

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",
  }]
}

I am using this data to generate HTML so it looks properly formatted and easily readable for the user. The way I am doing this is by creating a for loop to read through tennis and basketball categories. For example:

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);
}

How can I create one for loop that can read through both (or multiple) categories?

Here is my working example in this JSFiddle: https://jsfiddle.net/dsk1279b/1

Answer 1

Double loop, one to iterate the object properties, the next to iterate the array:

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

Final code:

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>