convert text string to tsnake case, and remove special character by condition.

stringToSnakeCase.js

function convertToSnakeCase(text) {
  let snakeCaseText = "";
  const specialChars = `!"#$%&'()*+,-./:;<=>?@[\\]^\`{|}~`;

  for (let index = 0; index < text.length; index++) {
    const char = text[index];

    if (char === "_" || char === " ") {
      snakeCaseText += "_"; // Preserve underscores and change spaces to underscores
    } else if (!specialChars.includes(char)) {
      snakeCaseText += char; // Append alphanumeric characters
    }
  }

  return snakeCaseText.toLowerCase();
}

// Example usage
console.log(convertToSnakeCase("Can123'''not move session to state \\\"open\\\" from state \\\"closed\\\"_UA"));
// Output: "cant_assign_users_to_expired_coupon_ua"