shift73k/assets_old/node_modules/is-boolean-object/index.js

26 lines
733 B
JavaScript

'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;
};