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ECMAScript spec abstract operations.

There is a newer version: 1.22.3

'use strict';

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

module.exports = function isSamePropertyDescriptor(ES, D1, D2) {
	var fields = [
		'[[Configurable]]',
		'[[Enumerable]]',
		'[[Get]]',
		'[[Set]]',
		'[[Value]]',
		'[[Writable]]'
	];
	return every(fields, function (field) {
		if ((field in D1) !== (field in D2)) {
			return false;
		}
		return ES.SameValue(D1[field], D2[field]);
	});
};