How To Decode Url Encoded String In Javascript

When working with web development, you might come across encoded URLs that need to be decoded for processing in your JavaScript code. Decoding URL encoded strings in JavaScript can be quite handy and is a simple process once you understand the necessary steps.

To decode a URL encoded string in JavaScript, you can use the `decodeURIComponent()` function. This function is used to decode a component of a Uniform Resource Identifier (URI) that has been encoded with the `encodeURIComponent()` function.

Here is a basic example to demonstrate how to decode a URL encoded string in JavaScript:

// Define the encoded URL string
let encodedString = "Hello%20World%21";

// Decode the encoded string
let decodedString = decodeURIComponent(encodedString);

// Output the decoded string
console.log(decodedString);

In this example, we first define an encoded URL string "Hello%20World%21". The `%20` represents a space character in URL encoding. We then use the `decodeURIComponent()` function to decode the string and store the decoded result in the `decodedString` variable. Finally, we log the decoded string to the console, which should output "Hello World!".

It is important to note that when decoding URL encoded strings in JavaScript, special characters such as spaces, question marks, and ampersands are represented by encoded values. Using the `decodeURIComponent()` function helps in converting these encoded values back to their original form.

Additionally, you can also decode a full URL in JavaScript by parsing the `window.location.href` property and decoding it using the `decodeURIComponent()` function.

// Decode the full URL
let decodedURL = decodeURIComponent(window.location.href);

// Output the decoded URL
console.log(decodedURL);

In this example, we decode the full URL of the current window by accessing the `window.location.href` property and then using the `decodeURIComponent()` function to decode it. The decoded URL is then logged to the console for display.

Understanding how to decode URL encoded strings in JavaScript can be beneficial when working with web development tasks that involve processing URLs or handling user input data. By utilizing the `decodeURIComponent()` function, you can easily decode encoded strings and make them usable in your JavaScript code.

In conclusion, decoding URL encoded strings in JavaScript is a practical skill to have as a developer. By using the `decodeURIComponent()` function, you can effortlessly decode encoded strings and work with them in your JavaScript applications. So, the next time you encounter an encoded URL in your code, remember to use `decodeURIComponent()` to decode it efficiently. Happy coding!