You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
24 lines
599 B
24 lines
599 B
'use strict';
|
|
|
|
var callBound = require('call-bound');
|
|
|
|
// eslint-disable-next-line no-extra-parens
|
|
var $deref = /** @type {<T extends WeakKey>(thisArg: WeakRef<T>) => T | undefined} */ (callBound('WeakRef.prototype.deref', true));
|
|
|
|
/** @type {import('.')} */
|
|
module.exports = typeof WeakRef === 'undefined'
|
|
? function isWeakRef(_value) { // eslint-disable-line no-unused-vars
|
|
return false;
|
|
}
|
|
: function isWeakRef(value) {
|
|
if (!value || typeof value !== 'object') {
|
|
return false;
|
|
}
|
|
try {
|
|
// @ts-expect-error
|
|
$deref(value);
|
|
return true;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
|