Errata

There are three problems with the code sample that make it not work. 1. The appid parameter in the example is in upper case, but the server requires it to be in lower case. 2. iOS rejects fetch requests of http by default, so the request should be https. (This is of course a good practice anyway. Please discourage unencrypted http traffic in all your works.) 3. this zip code needs to be provided in a 'zip' parameter.

Changing the code as follows makes it work for me:

const API_STEM = "https://api.openweathermap.org/data/2.5/weather?zip="
function zipurl(zip) {
return `${API_STEM}${zip}&units=imperial&appid=${WEATHER_API_KEY}`;
}