apphouse/dist/utils/string/getAllHiddenCharacters.ts

Component library for React that uses observable state management and theme-able components.

export const getAllHiddenCharacters = (inputValue: string) => {
  const hiddenCharacters: string[] = [];
  for (let i = 0; i < inputValue.length; i++) {
    const char: string = inputValue.charAt(i);

    // Check if the character is a control character (invisible or non-printable)
    if (char.charCodeAt(0) <= 31 || char.charCodeAt(0) === 127) {
      // hidden character found
      hiddenCharacters.push(char);
    }
  }

  return hiddenCharacters;
};