haccessed

HACCESSED

Snoop on your objects and see what they're up to

About

Haccessed is a function that "hijacks" an object, clones it, and exposes a "hidden" __print__ method. This __print__ method will return the original object filtering out un-accessed properties. It does this by using the Object.defineProperty method, which keeps the original object intact whilst monitoring lookups on properties.

Compatibility

This module is wrapped in UMD, and will work in any JavaScript environment that supports ES5 features.

You can:

• Bundle it in your webpack build.
• require it in node.
• Use it in rewire or jest.mock.
• require it AMD style for requirejs.

Use Cases

• Validate which fields of an API are being actively used.
• Inject into a test to validate lookups.
• Verify that fields aren't being used after a deprecation.
• Ensure pseudo-private _hidden fields aren't getting called.

Simple Example

const haccessed = require('haccessed');
const myObject = { id: 123, name: 'joel' };
const hijacked = haccessed(myObject);

hijacked.id; // referencing the id

hijacked.__print__(); // => { id: 123 }

Complex Example

const haccessed = require('haccessed');
const myObject = {
  id: 1,
  name: 'joel',
  address: {
    zip: '55555',
    state: 'wa'
  },
  friends: [{
    id: 2,
    name: 'bob'
  }, {
    id: 3,
    name: 'jane'
  } , {
    id: 4,
    name: 'sue'
  }]
};
const hijacked = haccessed(myObject);

hijacked.id;
hijacked.address.state;
hijacked.friends[0].name;

hijacked.__print__();
/*
{
  id: 1,
  address: {
    state: 'wa'
  },
  friends: [{ name: 'bob' }]
}
*/

TODO

• eslint
• travis-ci
• More fully-featured interface (accessed, inaccessed, unavailable)
• More edgcase tests
• Code coverage