Tggl Core

This package is used to evaluate flags and serves as a reference implementation.

If you are porting it to another language, copy standard_tests.json and write a single unit tests that iterates over all the examples of this file. This is exactly what standard.test.ts does.

Usage

You probably want to use the client rather than this library. The client nicely wraps this library in a more convenient way.

If you still want to use this library directly, add the package to your dependencies:

npm i tggl-core

Start evaluating flags:

import { evalFlag, Flag, Operator } from 'tggl-core'

const flag: Flag = {
  conditions: [
    {
      rules: [
        {
          key: 'email',
          operator: Operator.StrEndsWith,
          values: ['@acme.com'],
          negate: false,
        }
      ],
      variation: {
        active: true,
        value: 'foo'
      }
    },
  ],
  defaultVariation: {
    active: false,
    value: null,
  },
}

const result = evalFlag(
  {
    userId: 'foo',
    email: '[e-mail]'
  },
  flag
)

console.log(result) // => 'foo'