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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-18 23:26:45 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-18 23:26:45 +0100
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parent1870f3fdf43707a15fda0f609a021f516f45eb63 (diff)
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-rw-r--r--node_modules/es-abstract/2019/IsConstructor.js40
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diff --git a/node_modules/es-abstract/2019/IsConstructor.js b/node_modules/es-abstract/2019/IsConstructor.js
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--- a/node_modules/es-abstract/2019/IsConstructor.js
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-'use strict';
-
-var GetIntrinsic = require('../GetIntrinsic.js');
-
-var $construct = GetIntrinsic('%Reflect.construct%', true);
-
-var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
-try {
- DefinePropertyOrThrow({}, '', { '[[Get]]': function () {} });
-} catch (e) {
- // Accessor properties aren't supported
- DefinePropertyOrThrow = null;
-}
-
-// https://www.ecma-international.org/ecma-262/6.0/#sec-isconstructor
-
-if (DefinePropertyOrThrow && $construct) {
- var isConstructorMarker = {};
- var badArrayLike = {};
- DefinePropertyOrThrow(badArrayLike, 'length', {
- '[[Get]]': function () {
- throw isConstructorMarker;
- },
- '[[Enumerable]]': true
- });
-
- module.exports = function IsConstructor(argument) {
- try {
- // `Reflect.construct` invokes `IsConstructor(target)` before `Get(args, 'length')`:
- $construct(argument, badArrayLike);
- } catch (err) {
- return err === isConstructorMarker;
- }
- };
-} else {
- module.exports = function IsConstructor(argument) {
- // unfortunately there's no way to truly check this without try/catch `new argument` in old environments
- return typeof argument === 'function' && !!argument.prototype;
- };
-}