60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
'use strict';
|
|
|
|
var isFinite = require('../helpers/isFinite');
|
|
var isNaN = require('../helpers/isNaN');
|
|
|
|
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 (isNaN(n)) {
|
|
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;
|
|
};
|