instanceBox

What: You want to store javascript instances in the browser
Why: I dont care
How: this module aims to offer a solution

Important

This is a draft module, does not work when the instance references other objects within. Looks like it is not easy to have that but I'm working on that.

build and run test

• yarn
• yarn build
• yarn serve // runs on http://localhost:9999
• yarn test // runs 2 basic cypress tests

what to expect

In page one.html:

// a constructor is available
function Person(name, age){
    this.name = name;
    this.age = age;
    
    // not yet
    // this.doc = new Doc(this.name. this.age)
}
Person.prototype.sayHello = function () {
    return 'Hi, my name is ' + this.name;
};

// we create a instance
var me  = new Person('Federico', 42);

// now we would like to save it (local storage is the default one)
instanceBox.set('thisIsMe', me);

That's it, now we are free to navigate to another page and fully retrieve the instance. Let`s go for instance at page two.html.
We`ll be able to retrieve the instance simply using the get method passing the right key:

var me = instanceBox.get('thisIsMe');
console.log(me.sayHello()) // ---> Hi, my name is Federico

What about sessionStorage ?

To chance storage is enough to call the two functions:

• instanceBox.useSessionStorage()
• instanceBox.useLocalStorage()

before saving / retrieving from the target storage.

something more

instanceBox offers the following methods:

• useLocalStorage()
  sets localStorage as container
  returns: void

• useSessionStorage()
  sets sessionStorage as container
  returns: void

• set(key <string>, instance <object instance>)
  saves the given instance using the key provided
  returns: true OR Exception

• get(key <string>)
  attempts to retrieve the instance that has been saved with the given key
  returns: Object OR null

• remove(key <string>)
  if found removes the instance saved using the passed key
  returns: void

• clear()
  completely cleans out the container
  returns: void

• length()
  returns the number of elements saved
  returns: Number

• getSize(key <string>)
  returns the size in bytes of the instance saved using the given key
  returns: Number OR null