27 lines
697 B
JavaScript
27 lines
697 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 = 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;
|
||
|
|
};
|