v-mask/src/constants.js

Tiny input mask library for Vue.js based on text-mask-core (~5kb) exposed as directive. No dependencies

/**
 * A special object to identify next character as optional
 * For example `?`
 *
 * @type {Object}
 */
export const NEXT_CHAR_OPTIONAL = {
  __nextCharOptional__: true,
};

/**
 * @type {MaskReplaces}
 */
export const defaultMaskReplacers = {
  '#': /\d/,
  A: /[a-z]/i,
  N: /[a-z0-9]/i,
  '?': NEXT_CHAR_OPTIONAL,
  X: /./,
};