In this example, we populate the Typeahead component with JSON data that's dynamically fetched from an external source via the getSuggestions hook.
Also, this demo caps the max # of search results to display at 5.
{% include "@bolt-components-form/form.twig" with {
  children: include("@bolt-components-typeahead/typeahead.twig", {
    attributes: {
      class: [
        "js-typeahead-hook--dynamically-fetch-data"
      ]
    },
    max_results: 5,
    input_name: "q"
  }),
  attributes: {
    action: "https://www.pega.com/search",
    target: "_blank",
    method: "GET"
  }
} %}
// NOTE: make sure you're running this code through a tool like Babel before shipping for cross browser compatibility!
const dynamicTypeaheadDemo = document.querySelector(
  '.js-typeahead-hook--dynamically-fetch-data',
);
const setupEventHandlers = () => {
  // note: make sure to let Typeahead know when the data fetched is ready
  dynamicTypeaheadDemo.on('getSuggestions', async value => {
    return await new Promise(async resolve => {
      await fetch('/build/data/typeahead.data.json')
        .then(function(response) {
          return response.json();
        })
        .then(function(data) {
          return resolve(data);
        });
    });
  });
  dynamicTypeaheadDemo.on('onSelected', (element, event, suggestion) => {
    const exactMatch = element.items.filter(
      item => item.label === suggestion.suggestionValue,
    )[0];
    function navigateTo(url) {
      if (window.location !== window.parent.location) {
        const win = window.open(url, '_blank');
        win.focus();
      } else {
        window.location = url;
      }
    }
    if (exactMatch && exactMatch.url) {
      if (exactMatch.url) {
        navigateTo(exactMatch.url);
      } else {
        navigateTo(`https://www.pega.com/search?q=${itemSelected.label}`);
      }
    } else if (suggestion.suggestionValue !== '') {
      navigateTo(`https://www.pega.com/search?q=${suggestion.suggestionValue}`);
    }
  });
};
if (dynamicTypeaheadDemo) {
  if (dynamicTypeaheadDemo._wasInitiallyRendered) {
    setupEventHandlers();
  }
  dynamicTypeaheadDemo.addEventListener('ready', e => {
    if (e.detail.name === 'bolt-typeahead') {
      setupEventHandlers();
    }
  });
}