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StrictEqualityComparison.js « 2016 « es-abstract « node_modules - github.com/npm/cli.git - Unnamed repository; edit this file 'description' to name the repository.
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'use strict';

var Type = require('./Type');

// https://www.ecma-international.org/ecma-262/5.1/#sec-11.9.6

module.exports = function StrictEqualityComparison(x, y) {
	var xType = Type(x);
	var yType = Type(y);
	if (xType !== yType) {
		return false;
	}
	if (xType === 'Undefined' || xType === 'Null') {
		return true;
	}
	return x === y; // shortcut for steps 4-7
};