NStructJS

NStructJS is a little library for saving/loading highly structured JS objects as binary data (for more info, see the official documentation ). It is not suited for unstructed data (use JSON for that).
NStructJS arose out of the following shortcomings of JSON:

• JSON allocates objects twice.
• JSON is slow compared to what you can get with a structured binary format

The idea of NStructJS is to attach little scripts to your classes that define that class's data and how it is saved. For example:

class SomeClass {
  constructor() {
    this.data1 = 0;
    this.data2 = [1, 2, 3];
    this.obj = [some object];
  }

  //reader "fills in" fields in a newly created object with loaded data
  loadSTRUCT(reader) {
    reader(this);
    super.loadSTRUCT(reader);
  }
}
SomeClass.STRUCT = `
my_module.SomeClass {
  data1 : int;
  data2 : array;
  obj   : int | this.obj.id;
}
`;
nstructjs.register(SomeClass);

Control How Fields Are Saved

You can use little code snippets to control how fields are saved. For example, if you want to save an integer ID instead of a reference for an object property, you might do this:

my_module.AnotherClass {
  someclass : int | this.someclass !== undefined ? this.someclass.id : -1;
}

Versioning

To a certain extend nstructjs will gracefully handle version changes. The basic idea is to save a copy of your struct scripts with each file, that way each file knows how to load itself.