Refactor getQueryStringValue function using ES6 syntax and arrow functions

[melvincarvalho]

Issue Description: The current implementation of the getQueryStringValue function can be improved by adopting a more modern syntax using ES6 features and arrow functions. This refactoring aims to make the code more concise and easier to read.

Proposed Changes:

const getQueryStringValue = key => {
  const queryParams = new URLSearchParams(window.location.search.substring(1));
  return queryParams.get(key);
};

Benefits:

• The use of arrow functions results in a more concise syntax.
• The refactored code is easier to read and maintain.
• Utilizes modern ES6 features, ensuring better compatibility with current JavaScript environments.