I have encountered a cross-domain problem.
Below is the output of the console.
Failed to load https://www.mapquestapi.com/search/v3/prediction?limit=5&collection=poi%... No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. The response had HTTP status code 403. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.