Files
Tim van der Lippe bc3a0b7a2b Upgrade eslint-plugin-import
R=jacktfranklin@chromium.org

Bug: none
Change-Id: I0ad7ba9133af3db19c448a284d79bdfc08101dea
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3268294
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org>
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
2021-11-08 16:05:33 +00:00

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;
};