implode

This library implodes complex Javascript objects preparing them to be serialized and later on deserialized. Supported structures:

implode

This library implodes complex Javascript objects preparing them to be serialized and later on deserialized. Supported structures:

  • multiple references to the same object
  • circular references
  • functions (non-native and non-closure functions)
  • constructors
  • constructor instances

var implode    = require('implode')
var serialized = implode(obj) // serialize 
var recovered  = implode.recover(serialized) // deserialize 

To put the serialized object into a <script /> tag, use implode(obj).toString().

Breaking change in >=2.0.0: Prior to 2.0.0 it was possible to use JSON.stringify() and JSON.parse() to convert the serialized object to a string presentation and vice versa. However, to get rid of eval(), version 2.0.0 introduced implode(obj).toString(), which is similar to JSON, except that functions are not wrapped into double quotes. This allows to but the string presentation of the serialized object into <script/> tags directly. Using these JSON methods is still possible, but removes functions from the serialized object.

To use constructors, e.g.:

var User = function(idname) {
  this.id = id
  this.name = name
 
  // when being recovered, this constructor is called without arguments, 
  // therefore the bootstrap logic is moved to a seperate method 
  this.init()
}
 
User.prototype.init = function() {
  this.excerpt = this.id + '-' + this.name
}

... they have to be registered:

implode.register(
  'User', // unique identifier 
  User, // the constructor 
  ['id', 'name'] // a whitelist of properties to be serialized 
)

The following hooks are available:

User.prototype.$deserialize = function(obj) {
  // this hook allows to postprocess the object when it got recovered 
  obj.init()
  return obj
}
 
User.prototype.$serialize = function() {
  // this hook allows to preprocess the object for the implode process 
  return this
}

Copyright (c) 2013 Markus Ast

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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