Defunction NPM

defunction

Defensive javascript functions with run-time validation

Install

Install with npm

$ npm i defunction --save-dev

Usage

defunction takes three arguments.

defunction([validateArgument, validateArgument, ...], validateReturned, func)

And returns a defensive javascript function.

function validateNumber(label, arg) {
  if (typeof arg !== 'number') {
    throw new Error(`${label} type should be "number", not "${typeof arg}"`)
  }
  return arg
}

const add = defunction([validateNumber, validateNumber], validateNumber, function add(a, b) {
  return a + b
})

add(1, '2')
>> Error: add:arguments[1] type should be "number", not "string"