Javascript function to populate from query string

 function populateFieldsFromQueryString() {

  // Get the query string from the URL

  const queryString = window.location.search;

  // Check if there is a query string

  if (queryString) {

    // Remove the leading "?" character

    const queryParams = queryString.substring(1);

    // Split the query string into key-value pairs

    const keyValuePairs = queryParams.split("&");

    // Loop through the key-value pairs

    keyValuePairs.forEach((pair) => {

      // Split each pair into key and value

      const [key, value] = pair.split("=");

      // Decode the key and value (in case of URL encoding)

      const decodedKey = decodeURIComponent(key);

      const decodedValue = decodeURIComponent(value);

      // Find the corresponding field in the document

      const field = document.querySelector(`[name="${decodedKey}"]`);

      // Check if the field exists

      if (field) {

        // Populate the field with the value

        field.value = decodedValue;

      }

    });

  }

}