CK Env (check env)

Check and ensure environment variables.

Abilities

• Check existence
• Validate value
• Set default value

Features

• No dependencies
• Simple and easy to use
• Extensible for validation
• Throw error instead of killing the app
• Not assuming the place where the config comes from

Installation

npm install ck-env

Usage

const checkEnv = require('ck-env')

checkEnv({
  'ENV_0': false, // this env is not required
  'ENV_1': true, // this env is required
  'ENV_2': 'default value', // default value will be assigned to this env if it is not set
  'ENV_3': validator // this env is required and the value must pass the given validator

  // default value will be assigned to this env if it is not set
  // the env value, no matter how it is set, would be validated by the given validator
  'ENV_4': ['default value', validator]
})

// validator is a function which receives the env value and tells if it is valid
function validator(value) {
  reutrn ['A', 'B', 'C'].includes(value)
}

License

MIT