script.js

const apiKey = "4c94dd2f5415f800feecf7a6d2eb56c9";
const apiUrl =
  "https://api.openweathermap.org/data/2.5/weather?units=metric&q=";

const searchBox = document.querySelector(".search input");
const searchBtn = document.querySelector(".search button");
const weatherIcon = document.querySelector(".weather-icon");

//Async function to fetch the data by API id
async function checkWeather(city) {
  const response = await fetch(apiUrl + city + `&appid=${apiKey}`);

  //checking for 404 status to display error message
  if (response.status == 404) {
    document.querySelector(".error").style.display = "block";
    document.querySelector(".weather").style.display = "none";
  } 
  else {
    var data = await response.json();

    document.querySelector(".city").innerHTML = data.name;
    document.querySelector(".temp").innerHTML =
      Math.round(data.main.temp) + "°C";
    document.querySelector(".humidity").innerHTML = data.main.humidity + "%";
    document.querySelector(".wind").innerHTML = data.wind.speed + " km/h";

    //updating the weather condition image
    if (data.weather[0].main == "Clouds") {
      weatherIcon.src = "images/clouds.png";
    } else if (data.weather[0].main == "Rain") {
      weatherIcon.src = "images/rain.png";
    } else if (data.weather[0].main == "Clear") {
      weatherIcon.src = "images/clear.png";
    } else if (data.weather[0].main == "Drizzle") {
      weatherIcon.src = "images/drizzle.png";
    } else if (data.weather[0].main == "Mist") {
      weatherIcon.src = "images/mist.png";
    }

    //giving style block when "searchBox" gets clicked
    document.querySelector(".weather").style.display = "block";

    //giving style none when "searchBox" gets clicked
    document.querySelector(".error").style.display = "none";
  }
}

//when people will click on the search button "searchBox" send the city infomation in this "checkWeather()"
searchBtn.addEventListener("click", () => {
  checkWeather(searchBox.value); //it will give the value of city name written in the input field
});