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59 lines
1.7 KiB
59 lines
1.7 KiB
'use strict';
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var isFinite = require('math-intrinsics/isFinite');
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var IsStrictlyEqual = require('./IsStrictlyEqual');
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var StringToBigInt = require('./StringToBigInt');
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var ToNumber = require('./ToNumber');
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var ToPrimitive = require('./ToPrimitive');
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var Type = require('./Type');
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var isObject = require('../helpers/isObject');
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// https://262.ecma-international.org/13.0/#sec-islooselyequal
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module.exports = function IsLooselyEqual(x, y) {
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if (Type(x) === Type(y)) {
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return IsStrictlyEqual(x, y);
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}
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if (x == null && y == null) {
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return true;
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}
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if (typeof x === 'number' && typeof y === 'string') {
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return IsLooselyEqual(x, ToNumber(y));
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}
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if (typeof x === 'string' && typeof y === 'number') {
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return IsLooselyEqual(ToNumber(x), y);
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}
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if (typeof x === 'bigint' && typeof y === 'string') {
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var n = StringToBigInt(y);
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if (typeof n === 'undefined') {
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return false;
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}
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return IsLooselyEqual(x, n);
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}
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if (typeof x === 'string' && typeof y === 'bigint') {
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return IsLooselyEqual(y, x);
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}
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if (typeof x === 'boolean') {
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return IsLooselyEqual(ToNumber(x), y);
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}
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if (typeof y === 'boolean') {
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return IsLooselyEqual(x, ToNumber(y));
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}
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if ((typeof x === 'string' || typeof x === 'number' || typeof x === 'symbol' || typeof x === 'bigint') && isObject(y)) {
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return IsLooselyEqual(x, ToPrimitive(y));
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}
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if (isObject(x) && (typeof y === 'string' || typeof y === 'number' || typeof y === 'symbol' || typeof y === 'bigint')) {
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return IsLooselyEqual(ToPrimitive(x), y);
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}
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if ((typeof x === 'bigint' && typeof y === 'number') || (typeof x === 'number' && typeof y === 'bigint')) {
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if (!isFinite(x) || !isFinite(y)) {
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return false;
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}
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// eslint-disable-next-line eqeqeq
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return x == y; // shortcut for step 13.b.
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}
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return false;
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};
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