Weather App – CodingNepal

How to Build A Weather App in HTML CSS and JavaScript

CodingNepal — Wed, 28 Jun 2023 19:28:38 +0000

Are you new to web development and eager to enhance your skills by working on practical projects? Look no further! Building a weather app is an excellent way to begin your journey. With just HTML, CSS, and JavaScript, you can create an application that not only improves your web development abilities but also makes you familiar with JavaScript API calls.

In this blog post, I’ll guide you through building a weather app project using HTML, CSS, and JavaScript from scratch. If you prefer using Bootstrap, I’ve already covered that in a previous blog post on creating a Weather App in HTML, Bootstrap, and JavaScript. However, this weather project has some extra features that make it more useful.

In this weather app project, users can enter any city name to get the 5-day weather forecast or simply click on the “Use Current Location” button to get their current location’s weather details, including temperature, wind speed, humidity, and more. This project is also mobile-friendly, which means it looks great on all devices.

Video Tutorial of Weather App Project in JavaScript

If you prefer learning through video tutorials, this YouTube video is an excellent resource for understanding the process of creating your own weather app project. In the video, I’ve explained each line of code and provided informative comments to make it beginner-friendly and easy to follow.

However, if you like reading blog posts or want to know the steps involved in creating this weather app project, you can continue reading this post. By the end of this post, you will have your own weather app and a basic understanding of the basics of DOM manipulation, event handling, CSS styling, and APIs.

Steps To Create Weather App in HTML & JavaScript

To create your weather app using HTML, CSS, and JavaScript, follow these step-by-step instructions:

Create a folder. You can name this folder whatever you want, and inside this folder, create the mentioned files.
Create an index.html file. The file name must be index and its extension .html
Create a style.css file. The file name must be style and its extension .css
Create a script.js file. The file name must be script and its extension .js

To start, add the following HTML codes to your index.html file. This code includes a weather app header, input, button, and unordered list (ul) that are used as a placeholder for weather details. Later, using JavaScript, we’ll replace these placeholders with actual weather details.




  
    
    Weather App Project JavaScript | CodingNepal
    
    
    
  
  
    Weather Dashboard
    
      
        Enter a City Name
        
        
        
        
      
      
        
          
            _______ ( ______ )
            Temperature: __°C
            Wind: __ M/S
            Humidity: __%
          
        
        
          5-Day Forecast
          
            
              ( ______ )
              Temp: __C
              Wind: __ M/S
              Humidity: __%
            
            
              ( ______ )
              Temp: __C
              Wind: __ M/S
              Humidity: __%
            
            
              ( ______ )
              Temp: __C
              Wind: __ M/S
              Humidity: __%
            
            
              ( ______ )
              Temp: __C
              Wind: __ M/S
              Humidity: __%
            
            
              ( ______ )
              Temp: __C
              Wind: __ M/S
              Humidity: __%

Next, add the following CSS codes to your style.css file to apply visual styling to your weather app. Now, if you load the web page in your browser, you will see the header at the top, a sidebar with input and buttons, and weather detail placeholders. You can customize this code to your liking by adjusting the color, font, size, and other CSS properties.

/* Import Google font - Open Sans */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;500;600;700&display=swap');
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
}
body {
  background: #E3F2FD;
}
h1 {
  background: #5372F0;
  font-size: 1.75rem;
  text-align: center;
  padding: 18px 0;
  color: #fff;
}
.container {
  display: flex;
  gap: 35px;
  padding: 30px;
}
.weather-input {
  width: 550px;
}
.weather-input input {
  height: 46px;
  width: 100%;
  outline: none;
  font-size: 1.07rem;
  padding: 0 17px;
  margin: 10px 0 20px 0;
  border-radius: 4px;
  border: 1px solid #ccc;
}
.weather-input input:focus {
  padding: 0 16px;
  border: 2px solid #5372F0;
}
.weather-input .separator {
  height: 1px;
  width: 100%;
  margin: 25px 0;
  background: #BBBBBB;
  display: flex;
  align-items: center;
  justify-content: center;
}
.weather-input .separator::before{
  content: "or";
  color: #6C757D;
  font-size: 1.18rem;
  padding: 0 15px;
  margin-top: -4px;
  background: #E3F2FD;
}
.weather-input button {
  width: 100%;
  padding: 10px 0;
  cursor: pointer;
  outline: none;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  color: #fff;
  background: #5372F0;
  transition: 0.2s ease;
}
.weather-input .search-btn:hover {
  background: #2c52ed;
}
.weather-input .location-btn {
  background: #6C757D;
}
.weather-input .location-btn:hover {
  background: #5c636a;
}
.weather-data {
  width: 100%;
}
.weather-data .current-weather {
  color: #fff;
  background: #5372F0;
  border-radius: 5px;
  padding: 20px 70px 20px 20px;
  display: flex;
  justify-content: space-between;
}
.current-weather h2 {
  font-weight: 700;
  font-size: 1.7rem;
}
.weather-data h6 {
  margin-top: 12px;
  font-size: 1rem;
  font-weight: 500;
}
.current-weather .icon {
  text-align: center;
}
.current-weather .icon img {
  max-width: 120px;
  margin-top: -15px;
}
.current-weather .icon h6 {
  margin-top: -10px;
  text-transform: capitalize;
}
.days-forecast h2 {
  margin: 20px 0;
  font-size: 1.5rem;
}
.days-forecast .weather-cards {
  display: flex;
  gap: 20px;
}
.weather-cards .card {
  color: #fff;
  padding: 18px 16px;
  list-style: none;
  width: calc(100% / 5);
  background: #6C757D;
  border-radius: 5px;
}
.weather-cards .card h3 {
  font-size: 1.3rem;
  font-weight: 600;
}
.weather-cards .card img {
  max-width: 70px;
  margin: 5px 0 -12px 0;
}

@media (max-width: 1400px) {
  .weather-data .current-weather {
    padding: 20px;
  }
  .weather-cards {
    flex-wrap: wrap;
  }
  .weather-cards .card {
    width: calc(100% / 4 - 15px);
  }
}
@media (max-width: 1200px) {
  .weather-cards .card {
    width: calc(100% / 3 - 15px);
  }
}
@media (max-width: 950px) {
  .weather-input {
    width: 450px;
  }
  .weather-cards .card {
    width: calc(100% / 2 - 10px);
  }
}
@media (max-width: 750px) {
  h1 {
    font-size: 1.45rem;
    padding: 16px 0;
  }
  .container {
    flex-wrap: wrap;
    padding: 15px;
  }
  .weather-input {
    width: 100%;
  }
  .weather-data h2 {
    font-size: 1.35rem;
  }
}

Finally, add the following JavaScript code to your script.js file. This script code will make your weather app functional, which means now you can get a 5-day weather forecast for any city or your current location.

const cityInput = document.querySelector(".city-input");
const searchButton = document.querySelector(".search-btn");
const locationButton = document.querySelector(".location-btn");
const currentWeatherDiv = document.querySelector(".current-weather");
const weatherCardsDiv = document.querySelector(".weather-cards");

const API_KEY = "YOUR-API-KEY-HERE"; // API key for OpenWeatherMap API

const createWeatherCard = (cityName, weatherItem, index) => {
    if(index === 0) { // HTML for the main weather card
        return `
                    ${cityName} (${weatherItem.dt_txt.split(" ")[0]})
                    Temperature: ${(weatherItem.main.temp - 273.15).toFixed(2)}°C
                    Wind: ${weatherItem.wind.speed} M/S
                    Humidity: ${weatherItem.main.humidity}%
                
                
                    
                    ${weatherItem.weather[0].description}
                `;
    } else { // HTML for the other five day forecast card
        return `
                    (${weatherItem.dt_txt.split(" ")[0]})
                    
                    Temp: ${(weatherItem.main.temp - 273.15).toFixed(2)}°C
                    Wind: ${weatherItem.wind.speed} M/S
                    Humidity: ${weatherItem.main.humidity}%
                `;
    }
}

const getWeatherDetails = (cityName, latitude, longitude) => {
    const WEATHER_API_URL = `https://api.openweathermap.org/data/2.5/forecast?lat=${latitude}&lon=${longitude}&appid=${API_KEY}`;

    fetch(WEATHER_API_URL).then(response => response.json()).then(data => {
        // Filter the forecasts to get only one forecast per day
        const uniqueForecastDays = [];
        const fiveDaysForecast = data.list.filter(forecast => {
            const forecastDate = new Date(forecast.dt_txt).getDate();
            if (!uniqueForecastDays.includes(forecastDate)) {
                return uniqueForecastDays.push(forecastDate);
            }
        });

        // Clearing previous weather data
        cityInput.value = "";
        currentWeatherDiv.innerHTML = "";
        weatherCardsDiv.innerHTML = "";

        // Creating weather cards and adding them to the DOM
        fiveDaysForecast.forEach((weatherItem, index) => {
            const html = createWeatherCard(cityName, weatherItem, index);
            if (index === 0) {
                currentWeatherDiv.insertAdjacentHTML("beforeend", html);
            } else {
                weatherCardsDiv.insertAdjacentHTML("beforeend", html);
            }
        });        
    }).catch(() => {
        alert("An error occurred while fetching the weather forecast!");
    });
}

const getCityCoordinates = () => {
    const cityName = cityInput.value.trim();
    if (cityName === "") return;
    const API_URL = `https://api.openweathermap.org/geo/1.0/direct?q=${cityName}&limit=1&appid=${API_KEY}`;
    
    // Get entered city coordinates (latitude, longitude, and name) from the API response
    fetch(API_URL).then(response => response.json()).then(data => {
        if (!data.length) return alert(`No coordinates found for ${cityName}`);
        const { lat, lon, name } = data[0];
        getWeatherDetails(name, lat, lon);
    }).catch(() => {
        alert("An error occurred while fetching the coordinates!");
    });
}

const getUserCoordinates = () => {
    navigator.geolocation.getCurrentPosition(
        position => {
            const { latitude, longitude } = position.coords; // Get coordinates of user location
            // Get city name from coordinates using reverse geocoding API
            const API_URL = `https://api.openweathermap.org/geo/1.0/reverse?lat=${latitude}&lon=${longitude}&limit=1&appid=${API_KEY}`;
            fetch(API_URL).then(response => response.json()).then(data => {
                const { name } = data[0];
                getWeatherDetails(name, latitude, longitude);
            }).catch(() => {
                alert("An error occurred while fetching the city name!");
            });
        },
        error => { // Show alert if user denied the location permission
            if (error.code === error.PERMISSION_DENIED) {
                alert("Geolocation request denied. Please reset location permission to grant access again.");
            } else {
                alert("Geolocation request error. Please reset location permission.");
            }
        });
}

locationButton.addEventListener("click", getUserCoordinates);
searchButton.addEventListener("click", getCityCoordinates);
cityInput.addEventListener("keyup", e => e.key === "Enter" && getCityCoordinates());

Please note that your weather app is still unable to show the weather forecast for any location because you’ve not provided your OpenWeatherMap API key in the API_KEY variable. To get a free API key, sign up for an account at https://home.openweathermap.org/api_keys. Your API key may take minutes or hours to activate. You’ll get an error like “Invalid API Key” or something similar during this time.

In the code, there are two API calls. The first one fetches the geographic coordinates of the user-entered city. These coordinates are then used in the second API call to retrieve the weather forecast, which is displayed on the page. The code also includes a feature that asks for user location permission and, once granted, makes the second API call to fetch the weather forecast based on the user’s current location.

Conclusion and Final Words

In conclusion, building a weather app project allows you to apply your web development skills to a real-world application. Also, it helps you to better understand DOM manipulation, Event handling, CSS styling, APIs, and more. I hope that by following the steps in this post, you’ve successfully created your weather app using HTML, CSS, and JavaScript.

To understand this project’s code better, I recommend watching the above tutorial video, reading the code comments, and experimenting with the code. If you want to further enhance your web development skills, you should try recreating the Working Chatbot using HTML, CSS, and JavaScript.

If you encounter any difficulties while creating your weather app or your code is not working as expected, you can download the source code files for this weather app project for free by clicking the Download button. Keep in mind that after downloading the file, you’ll have to paste an “OpenWeatherMap API Key into the API_KEY variable in the script.js file.

Create Weather App in HTML Bootstrap and JavaScript

CodingNepal — Fri, 09 Jun 2023 13:00:33 +0000

In today’s digital age, weather apps have become an essential tool for staying informed about ever-changing weather conditions. As a beginner web developer, the idea of creating your weather app can be both exciting and educational.

In this blog post, I’ll guide you through the steps of creating a responsive weather app project using HTML, Bootstrap, and JavaScript. By creating this weather project, not only will you learn the basics of DOM manipulation, event handling, and CSS styling, but you’ll also gain valuable experience working with APIs.

In this weather app, users can enter the name of a city and get different weather details like temperature in Celsius, wind speed, humidity, and a 5-day forecast. But if you wish, you can easily add or remove the particular weather details because we’ll use the OpenWeatherMap API, so you’ll have access to a wide array of weather information.

https://www.codingnepalweb.com/wp-content/uploads/2023/06/Create-A-Weather-App-in-HTML-Bootstrap-and-JavaScript.mp4

Steps To Create Weather App in Bootstrap & JavaScript

To create your own weather app project using HTML, Bootstrap, and JavaScript, follow these step-by-step instructions:

Create a folder. You can name this folder whatever you want, and inside this folder, create the mentioned files.
Create an index.html file. The file name must be index and its extension .html
Create a style.css file. The file name must be style and its extension .css
Create a script.js file. The file name must be script and its extension .js

To start, add the following HTML codes to your index.html file. Since we’ve used Bootstrap for this project, the design, and layout are almost ready and responsive. After saving the HTML file and opening it in your browser, you’ll see a header, a search box on the left side, and some placeholders for weather details.




  
    
    Weather App Project | CodingNepal
    
    
    
    
  
  
    
      Weather Dashboard
    
    
      
        
          Enter a City Name
          
          
        
        
          
            
              
                _______ ( ______ )
                Temperature: __°C
                Wind: __ M/S
                Humidity: __%
              
          
          
          5-Day Forecast
          
            
              
                
                  ( ______ )
                  Temp: __°C
                  Wind: __ M/S
                  Humidity: __%
                
              
            
            
              
                
                  ( ______ )
                  Temp: __°C
                  Wind: __ M/S
                  Humidity: __%
                
              
            
            
              
                
                  ( ______ )
                  Temp: __°C
                  Wind: __ M/S
                  Humidity: __%
                
              
            
            
              
                
                  ( ______ )
                  Temp: __°C
                  Wind: __ M/S
                  Humidity: __%
                
              
            
            
              
                
                  ( ______ )
                  Temp: __°C
                  Wind: __ M/S
                  Humidity: __%

Next, add the following few CSS codes to your style.css file to add custom styling to some elements like font family, and image width.

/* Import Google font - Open Sans */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;500;600;700;800&display=swap');

* {
  font-family: 'Open Sans', sans-serif;
}

.current-weather img {
  max-width: 120px;
  margin-top: -15px;
}

Finally, add the following JavaScript code to your script.js file to make the weather app functional, which means getting different weather details for an entered city.

const cityInput = document.querySelector("#city-input");
const searchButton = document.querySelector("#search-btn");
const currentWeatherDiv = document.querySelector(".current-weather");
const daysForecastDiv = document.querySelector(".days-forecast");

const API_KEY = "PASTE-YOUR-API-KEY"; // Paste your API here

// Create weather card HTML based on weather data
const createWeatherCard = (cityName, weatherItem, index) => {
    if(index === 0) {
        return `
                    
                        ${cityName} (${weatherItem.dt_txt.split(" ")[0]})
                        Temperature: ${((weatherItem.main.temp - 273.15).toFixed(2))}°C
                        Wind: ${weatherItem.wind.speed} M/S
                        Humidity: ${weatherItem.main.humidity}%
                    
                    
                        
                        ${weatherItem.weather[0].description}
                    
                `;
    } else {
        return `
                    
                        
                            (${weatherItem.dt_txt.split(" ")[0]})
                            
                            Temp: ${((weatherItem.main.temp - 273.15).toFixed(2))}°C
                            Wind: ${weatherItem.wind.speed} M/S
                            Humidity: ${weatherItem.main.humidity}%
                        
                    
                `;
    }
}

// Get weather details of passed latitude and longitude
const getWeatherDetails = (cityName, latitude, longitude) => {
    const WEATHER_API_URL = `https://api.openweathermap.org/data/2.5/forecast?lat=${latitude}&lon=${longitude}&appid=${API_KEY}`;

    fetch(WEATHER_API_URL).then(response => response.json()).then(data => {
        const forecastArray = data.list;
        const uniqueForecastDays = new Set();

        const fiveDaysForecast = forecastArray.filter(forecast => {
            const forecastDate = new Date(forecast.dt_txt).getDate();
            if (!uniqueForecastDays.has(forecastDate) && uniqueForecastDays.size < 6) {
                uniqueForecastDays.add(forecastDate);
                return true;
            }
            return false;
        });

        cityInput.value = "";
        currentWeatherDiv.innerHTML = "";
        daysForecastDiv.innerHTML = "";

        fiveDaysForecast.forEach((weatherItem, index) => {
            const html = createWeatherCard(cityName, weatherItem, index);
            if (index === 0) {
                currentWeatherDiv.insertAdjacentHTML("beforeend", html);
            } else {
                daysForecastDiv.insertAdjacentHTML("beforeend", html);
            }
        });        
    }).catch(() => {
        alert("An error occurred while fetching the weather forecast!");
    });
}

// Get coordinates of entered city name
const getCityCoordinates = () => {
    const cityName = cityInput.value.trim();
    if (cityName === "") return;
    const API_URL = `https://api.openweathermap.org/geo/1.0/direct?q=${cityName}&limit=1&appid=${API_KEY}`;
  
    fetch(API_URL).then(response => response.json()).then(data => {
        if (!data.length) return alert(`No coordinates found for ${cityName}`);
        const { lat, lon, name } = data[0];
        getWeatherDetails(name, lat, lon);
    }).catch(() => {
        alert("An error occurred while fetching the coordinates!");
    });
}

searchButton.addEventListener("click", () => getCityCoordinates());

Please note that your weather app is currently unable to retrieve weather details because you have not provided your API key in the AP_KEY variable. To get a free API key from OpenWeatherMap, sign up for an account at https://home.openweathermap.org/api_keys.

In the code, there are two API calls. The first call gets the geographic coordinates of the city entered by the user. These coordinates are then used in the second call to retrieve the weather details, which are subsequently displayed on the page. Feel free to experiment with the code to gain a better understanding of its functionality.

Conclusion and Final Words

In conclusion, this blog post has guided you through the process of creating your own weather app using HTML, Bootstrap, and JavaScript. By following the steps outlined here, I hope you have successfully created your own weather app and learned how to work with APIs.

In addition to this weather app project, you can explore other exciting Bootstrap and JavaScript API projects available on this website to enhance your web development skills. These include Bootstrap Websites, ChatGPT Clone, Functional Image Gallery, Currency Converter, and more.

If you encounter any difficulties while creating your own weather app or your code is not working as expected, you can download the source code files for this weather app project for free by clicking the Download button. You can also view a live demo of it by clicking the View Live button.