How to promisify geolocation API to get current position using JavaScript?

JavascriptFront End TechnologyProgramming ScriptsWeb Development

In this tutorial, we will learn how to promisify geolocation API to get the current position of a user’s device using JavaScript.

The Geolocation API is a web API that allows applications to request the current position of the user's device. The API can be used to get the user's current position, as well as to monitor the user's position as they move.

The Geolocation API is a simple API that can be used to get the current position of the user's device. The API is easy to use and can be used in a variety of applications.

Approach

Follow the below steps to promisify the geolocation API to get the current position using JavaScript.

  • Step 1 − Create a new promise. The promise takes two arguments, resolve and reject. These are functions that are used to either resolve or reject the promise.

  • Step 2 − Get the current position using the Geolocation API. The getCurrentPosition method takes two arguments, a success callback, and an error callback.

  • Step 3 − The success callback is called when the position is obtained successfully. The position is passed to the resolve function.

  • Step 4 − The error callback is called when there is an error getting the position. The error is passed to the reject function.

  • Step 5 − Use the promise.

  • Step 6 − The then method is called when the promise is resolved. The position is passed to the then method as an argument.

  • Step 7 − Display the position on the user screen.

  • Step 8 − The catch method is called when the promise is rejected. The error is passed to the catch method as an argument.

  • Step 9 − Display the error on the console/ user screen.

Example

The following code shows a complete example of how to promisify the Geolocation API to get the current position of the user's device.

<!Doctype HTML> <HTML> <head> <title>Example- Get current position</title> </head> <body> <div> <div id="result1">Latitude: </div> <div id="result2">Longitude: </div> <div id="result3"></div> <script> // Create a new promise const getCurrentPosition = new Promise((resolve, reject) => { // Get the current position navigator.geolocation.getCurrentPosition( // Success callback position => resolve(position), // Error callback error => reject(error) ); }); // Use the promise getCurrentPosition .then(position => { // Position obtained successfully const { coords } = position; document.getElementById("result1").innerHTML += coords.latitude; document.getElementById("result2").innerHTML += coords.longitude; }) .catch(error => { // Error occurred document.getElementById("result3").innerHTML = error; }); </script> </body> </html>

The main benefit of using promises is that it makes the code easier to read and understand. Promises are easy to use and make the code more manageable.

Conclusion

In this tutorial, we have seen how to promisify the Geolocation API to get the current position of the user's device. The Geolocation API is a simple API that can be used to get the current position of the user's device. The API is easy to use and can be used in a variety of applications.

raja
Updated on 10-Oct-2022 12:09:13

Advertisements