freeCodeCamp

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id	title	challengeType
587d7fae367417b2b2512be5	Convert JSON Data to HTML	6

Description

Now that you're getting data from a JSON API, you can display it in the HTML. You can use a forEach method to loop through the data since the cat photo objects are held in an array. As you get to each item, you can modify the HTML elements. First, declare an html variable with var html = "";. Then, loop through the JSON, adding HTML to the variable that wraps the key names in strong tags, followed by the value. When the loop is finished, you render it. Here's the code that does this:

json.forEach(function(val) {
  var keys = Object.keys(val);
  html += "<div class = 'cat'>";
  keys.forEach(function(key) {
    html += "<strong>" + key + "</strong>: " + val[key] + "<br>";
  });
  html += "</div><br>";
});

Instructions

Add a forEach method to loop over the JSON data and create the HTML elements to display it. Here is some example JSON

[
  {
    "id":0,
      "imageLink":"https://s3.amazonaws.com/freecodecamp/funny-cat.jpg",
      "altText":"A white cat wearing a green helmet shaped melon on its head. ",
      "codeNames":[ "Juggernaut", "Mrs. Wallace", "Buttercup"
    ]
  }
]

Tests

tests:
  - text: Your code should store the data in the <code>html</code> variable
    testString: assert(code.match(/html\s+?(\+=|=\shtml\s\+)/g), 'Your code should store the data in the <code>html</code> variable');
  - text: Your code should use a <code>forEach</code> method to loop over the JSON data from the API.
    testString: assert(code.match(/json\.forEach/g), 'Your code should use a <code>forEach</code> method to loop over the JSON data from the API.');
  - text: Your code should wrap the key names in <code>strong</code> tags.
    testString: assert(code.match(/<strong>.+<\/strong>/g), 'Your code should wrap the key names in <code>strong</code> tags.');

Challenge Seed

<script>
  document.addEventListener('DOMContentLoaded',function(){
    document.getElementById('getMessage').onclick=function(){
      req=new XMLHttpRequest();
      req.open("GET",'/json/cats.json',true);
      req.send();
      req.onload=function(){
        json=JSON.parse(req.responseText);
        var html = "";
        // Add your code below this line



        // Add your code above this line
        document.getElementsByClassName('message')[0].innerHTML=html;
      };
    };
  });
</script>
<style>
  body {
    text-align: center;
    font-family: "Helvetica", sans-serif;
  }
  h1 {
    font-size: 2em;
    font-weight: bold;
  }
  .box {
    border-radius: 5px;
    background-color: #eee;
    padding: 20px 5px;
  }
  button {
    color: white;
    background-color: #4791d0;
    border-radius: 5px;
    border: 1px solid #4791d0;
    padding: 5px 10px 8px 10px;
  }
  button:hover {
    background-color: #0F5897;
    border: 1px solid #0F5897;
  }
</style>
<h1>Cat Photo Finder</h1>
<p class="message">
  The message will go here
</p>
<p>
  <button id="getMessage">
    Get Message
  </button>
</p>

Solution

// solution required

3.6 KiB Raw Blame History