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2 years ago
'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 = require('has-tostringtag/shams')();
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;
};