// SET UP THE MAP

var mapProjection = new ol.proj.Projection({
  code: 'EPSG:3857',
  extent: [-20037508, -20037508, 20037508, 20037508.34]
})
var geoProjection = new ol.proj.Projection({
  code: 'EPSG:4326',
  extent: [-180, -180, 180, 180]
})

var map = new ol.Map({
  layers:[
    new ol.layer.Tile({
      source: new ol.source.XYZ({
        url: 'https://api.mapbox.com/styles/v1/mapbox/outdoors-v10/tiles/256/{z}/{x}/{y}?access_token=pk.eyJ1Ijoid2lsbC1icmVpdGtyZXV0eiIsImEiOiItMTJGWEF3In0.HEvuRMMVxBVR5-oDYvudxw'
      })
    })
  ],
  target: 'map',
  view: new ol.View({
    center: ol.proj.transform([-96, 39], geoProjection, mapProjection),
    zoom: 5
  })
});

var app = {
  mapzenKey: 'mapzen-CpAANqF',
  activeSearch: 'from',
  
  typeAhead: function(e){
  var el = e.target;
  var val = el.value;
  console.log(val);
  }, 
  
  queryAutocomplete: throttle(function(){}, 150)
    
}

$('#search-from-input').on('keyup', {input:'from'}, app.typeAhead);

// SET UP THE MAP

var mapProjection = new ol.proj.Projection({
  code: 'EPSG:3857',
  extent: [-20037508, -20037508, 20037508, 20037508.34]
})
var geoProjection = new ol.proj.Projection({
  code: 'EPSG:4326',
  extent: [-180, -180, 180, 180]
})

var map = new ol.Map({
  layers:[
    new ol.layer.Tile({
      source: new ol.source.XYZ({
        url: 'https://api.mapbox.com/styles/v1/mapbox/outdoors-v10/tiles/256/{z}/{x}/{y}?access_token=pk.eyJ1Ijoid2lsbC1icmVpdGtyZXV0eiIsImEiOiItMTJGWEF3In0.HEvuRMMVxBVR5-oDYvudxw'
      })
    })
  ],
  target: 'map',
  view: new ol.View({
    center: ol.proj.transform([-96, 39], geoProjection, mapProjection),
    zoom: 5
  })
});

  typeAhead: function(e){
    var el = e.target;
    var val = el.value;
    if(val.length > 2){
      app.queryAutocomplete(val, function(err, data){
        // step 1
        if(err) return console.log(err);

        // step 2
        if(data.features) app.options = data.features;

        // step 3
        app.renderResultsList();
      })
    }
  }
  
  queryAutocomplete: throttle(function(text, callback){
    $.ajax({
      url: 'https://search.mapzen.com/v1/autocomplete?text=' + text + '&api_key=' + app.mapzenKey, 
      success: function(data, status, req){
        callback(null, data);
      },
      error: function(req, status, err){
        callback(err)
      }
    })
  }, 150)
	renderResultList: function(){
      var resultsList = $('#results-list');
      resultsList.empty();
      
      var results = app.options.map(function(feature){
      	var li = $('<li class = "results-list-item">' + feature.properties.label + '</li>');
        
      return li;
      })
	}
}

$('#search-from-input').on('keyup', {input:'from'}, app.typeAhead);

Update app.js