rule/rx.js

  1. /**
  2.  * Svelte Form validation rules module.
  3.  * @module svelte-form/rule/rx
  4.  */
  6. import tc from '@spaceavocado/type-check';
  8. /**
  9.  * Custom regex rule.
  10.  * @param {string} msg error message.
  11.  * @param {number} arg Regular expression.
  12.  * @return {boolean|string} true when valid, error message otherwise.
  13.  */
  14. export default (msg, arg) => (value) => {
  15.   if (tc.isNullOrUndefined(value) || tc.not.isString(value)) {
  16.     return msg;
  17.   }
  18.   if (value.match(arg) == null) {
  19.     return msg;
  20.   }
  21.   return true;
  22. };