@skhemata/skhemata-form/src/validator/lib/isLength.js

Skhemata Form Web Component. This web component can be used as base web component when working with forms and inputs.

import assertString from './util/assertString';

/* eslint-disable prefer-rest-params */
export default function isLength(str, options) {
  assertString(str);
  let min;
  let max;
  if (typeof (options) === 'object') {
    min = options.min || 0;
    max = options.max;
  } else { // backwards compatibility: isLength(str, min [, max])
    min = arguments[1] || 0;
    max = arguments[2];
  }
  const surrogatePairs = str.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g) || [];
  const len = str.length - surrogatePairs.length;
  return len >= min && (typeof max === 'undefined' || len <= max);
}