+++ /dev/null
-'use strict';
-
-var callBound = require('call-bind/callBound');
-var $boolToStr = callBound('Boolean.prototype.toString');
-var $toString = callBound('Object.prototype.toString');
-
-var tryBooleanObject = function booleanBrandCheck(value) {
- try {
- $boolToStr(value);
- return true;
- } catch (e) {
- return false;
- }
-};
-var boolClass = '[object Boolean]';
-var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-module.exports = function isBoolean(value) {
- if (typeof value === 'boolean') {
- return true;
- }
- if (value === null || typeof value !== 'object') {
- return false;
- }
- return hasToStringTag && Symbol.toStringTag in value ? tryBooleanObject(value) : $toString(value) === boolClass;
-};