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- 'use strict';
- var isFinite = require('../helpers/isFinite');
- var IsStrictlyEqual = require('./IsStrictlyEqual');
- var StringToBigInt = require('./StringToBigInt');
- var ToNumber = require('./ToNumber');
- var ToPrimitive = require('./ToPrimitive');
- var Type = require('./Type');
- // https://262.ecma-international.org/13.0/#sec-islooselyequal
- module.exports = function IsLooselyEqual(x, y) {
- var xType = Type(x);
- var yType = Type(y);
- if (xType === yType) {
- return IsStrictlyEqual(x, y);
- }
- if (x == null && y == null) {
- return true;
- }
- if (xType === 'Number' && yType === 'String') {
- return IsLooselyEqual(x, ToNumber(y));
- }
- if (xType === 'String' && yType === 'Number') {
- return IsLooselyEqual(ToNumber(x), y);
- }
- if (xType === 'BigInt' && yType === 'String') {
- var n = StringToBigInt(y);
- if (typeof n === 'undefined') {
- return false;
- }
- return IsLooselyEqual(x, n);
- }
- if (xType === 'String' && yType === 'BigInt') {
- return IsLooselyEqual(y, x);
- }
- if (xType === 'Boolean') {
- return IsLooselyEqual(ToNumber(x), y);
- }
- if (yType === 'Boolean') {
- return IsLooselyEqual(x, ToNumber(y));
- }
- if ((xType === 'String' || xType === 'Number' || xType === 'Symbol' || xType === 'BigInt') && yType === 'Object') {
- return IsLooselyEqual(x, ToPrimitive(y));
- }
- if (xType === 'Object' && (yType === 'String' || yType === 'Number' || yType === 'Symbol' || yType === 'BigInt')) {
- return IsLooselyEqual(ToPrimitive(x), y);
- }
- if ((xType === 'BigInt' && yType === 'Number') || (xType === 'Number' && yType === 'BigInt')) {
- if (!isFinite(x) || !isFinite(y)) {
- return false;
- }
- // eslint-disable-next-line eqeqeq
- return x == y; // shortcut for step 13.b.
- }
- return false;
- };
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