@skhemata/skhemata-form/src/validator/lib/isIn.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';
import toString from './util/toString';

export default function isIn(str, options) {
  assertString(str);
  let i;
  if (Object.prototype.toString.call(options) === '[object Array]') {
    const array = [];
    for (i in options) {
      // https://github.com/gotwarlost/istanbul/blob/master/ignoring-code-for-coverage.md#ignoring-code-for-coverage-purposes
      // istanbul ignore else
      if ({}.hasOwnProperty.call(options, i)) {
        array[i] = toString(options[i]);
      }
    }
    return array.indexOf(str) >= 0;
  } else if (typeof options === 'object') {
    return options.hasOwnProperty(str);
  } else if (options && typeof options.indexOf === 'function') {
    return options.indexOf(str) >= 0;
  }
  return false;
}