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- 'use strict';
- var StrictEqualityComparison = require('./StrictEqualityComparison');
- var StringToBigInt = require('./StringToBigInt');
- var ToNumber = require('./ToNumber');
- var ToPrimitive = require('./ToPrimitive');
- var Type = require('./Type');
- var isNaN = require('math-intrinsics/isNaN');
- var isObject = require('../helpers/isObject');
- // https://262.ecma-international.org/11.0/#sec-abstract-equality-comparison
- module.exports = function AbstractEqualityComparison(x, y) {
- if (Type(x) === Type(y)) {
- return StrictEqualityComparison(x, y);
- }
- if (x == null && y == null) {
- return true;
- }
- if (typeof x === 'number' && typeof y === 'string') {
- return AbstractEqualityComparison(x, ToNumber(y));
- }
- if (typeof x === 'string' && typeof y === 'number') {
- return AbstractEqualityComparison(ToNumber(x), y);
- }
- if (typeof x === 'bigint' && typeof y === 'string') {
- var n = StringToBigInt(y);
- if (isNaN(n)) {
- return false;
- }
- return AbstractEqualityComparison(x, n);
- }
- if (typeof x === 'string' && typeof y === 'bigint') {
- return AbstractEqualityComparison(y, x);
- }
- if (typeof x === 'boolean') {
- return AbstractEqualityComparison(ToNumber(x), y);
- }
- if (typeof y === 'boolean') {
- return AbstractEqualityComparison(x, ToNumber(y));
- }
- if ((typeof x === 'string' || typeof x === 'number' || typeof x === 'bigint' || typeof x === 'symbol') && isObject(y)) {
- return AbstractEqualityComparison(x, ToPrimitive(y));
- }
- if (isObject(x) && (typeof y === 'string' || typeof y === 'number' || typeof y === 'bigint' || typeof y === 'symbol')) {
- return AbstractEqualityComparison(ToPrimitive(x), y);
- }
- if ((typeof x === 'bigint' && typeof y === 'number') || (typeof x === 'number' && typeof y === 'bigint')) {
- if (isNaN(x) || isNaN(y) || x === Infinity || y === Infinity || x === -Infinity || y === -Infinity) {
- return false;
- }
- return x == y; // eslint-disable-line eqeqeq
- }
- return false;
- };
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