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58 lines
1.8 KiB
58 lines
1.8 KiB
'use strict'; |
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var isFinite = require('math-intrinsics/isFinite'); |
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var isObject = require('es-object-atoms/isObject'); |
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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 isSameType = require('../helpers/isSameType'); |
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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 (isSameType(x, 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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