1 | 'use strict';
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2 |
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3 | var isFinite = require('math-intrinsics/isFinite');
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4 |
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5 | var IsStrictlyEqual = require('./IsStrictlyEqual');
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6 | var StringToBigInt = require('./StringToBigInt');
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7 | var ToNumber = require('./ToNumber');
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8 | var ToPrimitive = require('./ToPrimitive');
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9 | var Type = require('./Type');
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10 |
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11 | var isObject = require('../helpers/isObject');
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12 |
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13 | // https://262.ecma-international.org/13.0/#sec-islooselyequal
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14 |
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15 | module.exports = function IsLooselyEqual(x, y) {
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16 | if (Type(x) === Type(y)) {
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17 | return IsStrictlyEqual(x, y);
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18 | }
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19 | if (x == null && y == null) {
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20 | return true;
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21 | }
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22 | if (typeof x === 'number' && typeof y === 'string') {
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23 | return IsLooselyEqual(x, ToNumber(y));
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24 | }
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25 | if (typeof x === 'string' && typeof y === 'number') {
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26 | return IsLooselyEqual(ToNumber(x), y);
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27 | }
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28 | if (typeof x === 'bigint' && typeof y === 'string') {
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29 | var n = StringToBigInt(y);
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30 | if (typeof n === 'undefined') {
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31 | return false;
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32 | }
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33 | return IsLooselyEqual(x, n);
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34 | }
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35 | if (typeof x === 'string' && typeof y === 'bigint') {
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36 | return IsLooselyEqual(y, x);
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37 | }
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38 | if (typeof x === 'boolean') {
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39 | return IsLooselyEqual(ToNumber(x), y);
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40 | }
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41 | if (typeof y === 'boolean') {
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42 | return IsLooselyEqual(x, ToNumber(y));
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43 | }
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44 | if ((typeof x === 'string' || typeof x === 'number' || typeof x === 'symbol' || typeof x === 'bigint') && isObject(y)) {
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45 | return IsLooselyEqual(x, ToPrimitive(y));
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46 | }
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47 | if (isObject(x) && (typeof y === 'string' || typeof y === 'number' || typeof y === 'symbol' || typeof y === 'bigint')) {
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48 | return IsLooselyEqual(ToPrimitive(x), y);
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49 | }
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50 | if ((typeof x === 'bigint' && typeof y === 'number') || (typeof x === 'number' && typeof y === 'bigint')) {
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51 | if (!isFinite(x) || !isFinite(y)) {
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52 | return false;
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53 | }
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54 | // eslint-disable-next-line eqeqeq
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55 | return x == y; // shortcut for step 13.b.
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56 | }
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57 | return false;
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58 | };
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