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Last change
on this file was 9af201e, checked in by MBK <marija.karapandzova@…>, 11 days ago |
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Fix frontend appearance
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Property mode
set to
100644
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File size:
599 bytes
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| [9af201e] | 1 | 'use strict';
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| 2 |
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| 3 | var callBound = require('call-bound');
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| 4 |
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| 5 | // eslint-disable-next-line no-extra-parens
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| 6 | var $deref = /** @type {<T extends WeakKey>(thisArg: WeakRef<T>) => T | undefined} */ (callBound('WeakRef.prototype.deref', true));
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| 7 |
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| 8 | /** @type {import('.')} */
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| 9 | module.exports = typeof WeakRef === 'undefined'
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| 10 | ? function isWeakRef(_value) { // eslint-disable-line no-unused-vars
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| 11 | return false;
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| 12 | }
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| 13 | : function isWeakRef(value) {
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| 14 | if (!value || typeof value !== 'object') {
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| 15 | return false;
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| 16 | }
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| 17 | try {
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| 18 | // @ts-expect-error
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| 19 | $deref(value);
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| 20 | return true;
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| 21 | } catch (e) {
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| 22 | return false;
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| 23 | }
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| 24 | };
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