json-relative-date-reviver

var relativeDateReviver = require('json-relative-date-reviver');

var o = JSON.parse('{
  "foo": {
    "RelativeDate": {
      "when": "now"
    }
  }
}', relativeDateReviver);
console.log(o.foo); // will be todays dates

This library uses the NPM module relative-time-parser and wraps it in a reviver class that can be supplied to a JSON.parse call. It's meant for use in scenarios where static test data is created for unit testing but said data has a relationship with the current/system date.

The when property is processed as described by the relative-time-parser and can be used to select dates/times relative to the current date.

The reviver looks for the presence of a RelativeDate property and triggers the translation from there. It also accepts a secondary property format which uses the format as described by the moment module.

var o = JSON.parse('{
  "oneWeekInFuture": {
    "RelativeDate": {
      "when": "+7d",
      "format": "YYYY-MM-DD"
    }
  }
}', relativeDateReviver);

console.log(o.oneWeekInFuture);