Utility for associating truly private state with any JavaScript object. 

Utility for associating truly private state with any JavaScript object

benjamn

private

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  "description": "Utility for associating truly private state with any JavaScript object",

  "homepage": "http://github.com/benjamn/private",

    "url": "git://github.com/benjamn/private.git"

    "test": "mocha --reporter spec --full-trace test/run.js"

var originalDefProp = Object.defineProperty;

    originalDefProp.call(originalObject, obj, name, { value: value });

  } catch (definePropertyIsBrokenInIE8) {

// For functions that will be invoked using .call or .apply, we need to

// define those methods on the function objects themselves, rather than

// inheriting them from Function.prototype, so that a malicious or clumsy

// third party cannot interfere with the functionality of this module by

// redefining Function.prototype.call or .apply.

var hasOwn = makeSafeToCall(Object.prototype.hasOwnProperty);

var numToStr = makeSafeToCall(Number.prototype.toString);

var strSlice = makeSafeToCall(String.prototype.slice);

    return originalCreate.call(originalObject, prototype);

  // Collisions are highly unlikely, but this module is in the business of

  // making guarantees rather than safe bets.

  do var uniqueKey = internString(strSlice.call(numToStr.call(rand(), 36), 2));

  while (hasOwn.call(uniqueKeys, uniqueKey));

  return uniqueKeys[uniqueKey] = uniqueKey;

// External users might find this function useful, but it is not necessary

defProp(exports, "makeUniqueKey", makeUniqueKey);

// Object.getOwnPropertyNames is the only way to enumerate non-enumerable

// properties, so if we wrap it to ignore our secret keys, there should be

// no way (except guessing) to access those properties.

var originalGetOPNs = Object.getOwnPropertyNames;

Object.getOwnPropertyNames = function getOwnPropertyNames(object) {

  for (var names = originalGetOPNs(object),

    if (!hasOwn.call(uniqueKeys, names[src])) {

  secretCreatorFn = secretCreatorFn || defaultCreatorFn;

      // Only code that has access to the passkey can retrieve (or forget)

          : secret || (secret = secretCreatorFn(object));

defProp(exports, "makeAccessor", makeAccessor);

		@@ -19,3 +19,3 @@ {
		],
		"version": "0.1.6",
		"version": "0.1.7",
		"homepage": "http://github.com/benjamn/private",
		@@ -28,8 +28,14 @@ "repository": {
		"main": "private.js",
		"files": [
		"private.js"
		],
		"scripts": {
		"test": "node test/run.js"
		"test": "mocha --reporter spec --full-trace test/run.js"
		},
		"engines": {
		"node": ">= 0.6"
		},
		"devDependencies": {
		"mocha": "^3.2.0"
		}
		}

		@@ -65,3 +65,3 @@ "use strict";
		// for the typical use of this module.
		defProp(exports, "makeUniqueKey", makeUniqueKey);
		exports.makeUniqueKey = makeUniqueKey;

		@@ -130,2 +130,2 @@ // Object.getOwnPropertyNames is the only way to enumerate non-enumerable

		defProp(exports, "makeAccessor", makeAccessor);
		exports.makeAccessor = makeAccessor;

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