ow-lite/lib/string.js

Lightweight replacement for the ow validation library meant for browser usage.

'use strict'

const { func } = require('./symbols')

const stringPredicates = {
  empty: (value) => (value === ''),
  nonEmpty: (value) => (value !== ''),

  [func]: {
    is: (fn) => fn,
    eq: (v) => (value) => (value === v),
    length: (v) => (value) => (value.length === v),
    minLength: (v) => (value) => (value.length >= v),
    maxLength: (v) => (value) => (value.length <= v),
    matches: (v) => (value) => v.test(value),
    startsWith: (v) => (value) => value.startsWith(v),
    endsWith: (v) => (value) => value.endsWith(v)
  }
}

module.exports = {
  predicates: stringPredicates,
  validator: (value) => {
    return typeof value === 'string'
  }
}