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HTML

              
                <div id="page-wrapper">
  <h1>Datalist Element Demo</h1>
  
  <label for="default">Pick a programming language</label>
  <input type="text" id="default" list="languages" placeholder="e.g. JavaScript">
  
  <datalist id="languages">
    <option value="HTML">
    <option value="CSS">
    <option value="JavaScript">
    <option value="Java">
    <option value="Ruby">
    <option value="PHP">
    <option value="Go">
    <option value="Erlang">
    <option value="Python">
    <option value="C">
    <option value="C#">
    <option value="C++">
  </datalist>
  
  
  <label for="ajax">Pick an HTML Element (options loaded using AJAX)</label>
  <input type="text" id="ajax" list="json-datalist" placeholder="e.g. datalist">
  <datalist id="json-datalist"></datalist>

  
</div>
              
            
!

CSS

              
                *, *:before, *:after {
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

html {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 100%;
  background: #333;
  -webkit-font-smoothing: antialiased;
}

#page-wrapper {
  width: 640px;
  background: #FFFFFF;
  padding: 1em;
  margin: 1em auto;
  border-top: 5px solid #69c773;
  box-shadow: 0 2px 10px rgba(0,0,0,0.8);
}

h1 {
  margin-top: 0;
}

label {
  display: block;
  margin-top: 2em;
  margin-bottom: 0.5em;
  color: #999999;
}

input {
  width: 100%;
  padding: 0.5em 0.5em;
  font-size: 1.2em;
  border-radius: 3px;
  border: 1px solid #D9D9D9;
}

button {
  display: inline-block;
  border-radius: 3px;
  border: none;
  font-size: 0.9rem;
  padding: 0.5rem 0.8em;
  background: #69c773;
  border-bottom: 1px solid #498b50;
  color: white;
  -webkit-font-smoothing: antialiased;
  font-weight: bold;
  margin: 0;
  width: 100%;
  text-align: center;
}

button:hover, button:focus {
  opacity: 0.75;
  cursor: pointer;
}

button:active {
  opacity: 1;
  box-shadow: 0 -3px 10px rgba(0, 0, 0, 0.1) inset;
}

              
            
!

JS

              
                // Get the <datalist> and <input> elements.
var dataList = document.getElementById('json-datalist');
var input = document.getElementById('ajax');

// Create a new XMLHttpRequest.
var request = new XMLHttpRequest();

// Handle state changes for the request.
request.onreadystatechange = function(response) {
  if (request.readyState === 4) {
    if (request.status === 200) {
      // Parse the JSON
      var jsonOptions = JSON.parse(request.responseText);
  
      // Loop over the JSON array.
      jsonOptions.forEach(function(item) {
        // Create a new <option> element.
        var option = document.createElement('option');
        // Set the value using the item in the JSON array.
        option.value = item;
        // Add the <option> element to the <datalist>.
        dataList.appendChild(option);
      });
      
      // Update the placeholder text.
      input.placeholder = "e.g. datalist";
    } else {
      // An error occured :(
      input.placeholder = "Couldn't load datalist options :(";
    }
  }
};

// Update the placeholder text.
input.placeholder = "Loading options...";

// Set up and make the request.
request.open('GET', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/4621/html-elements.json', true);
request.send();

              
            
!
999px

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