json-value-type

get the JSON type of a value

var jsonType = require('json-value-type')

function naiveType(val) {
  if (val === undefined) return
  var jsonValue = JSON.parse(JSON.stringify(val))
  return Object.prototype.toString.call(jsonValue).slice(8, -1).toLowerCase()
}

jsonType(new String()) // 'string'
naiveType(new String()) // 'string'

jsonType(NaN) // 'null'
naiveType(NaN) // 'null'

jsonType(Object.create(null)) // 'object'
jsonType(new Array(3)) // 'array'

json-value-type returns the same string type as the naive function defined above with optimizations to avoid any actual JSON parsing and minimize Object.prototype.toString calls to edge cases only.

License

Released under the MIT License