launchpad-docs-search.js

var searchInput = document.querySelector('#search-input');

searchInput.addEventListener('input', function() { // Triggers when a user writes something
  Launchpad // Uses Launchpad API Client to make an AJAX request 
    .url('http://liferay.io/docs/search/all') // Points to the API URL where the data is stored
    .search('*', 'prefix', searchInput.value) // Filters results based on what the user typed
    .highlight('content') // Automatically highlights the words that matched our query
    .get() // Specifies what kind of HTTP request are we going to make
    .then(function(result) {
      // Renders the result in the page
    });
});