classify variable types with precision

yarn add @davalapar/vartype

const vartype = require('@davalapar/vartype');

vartype(value <Any>, strict? <Boolean>) : <String>

vartype(value);

• null, array, object
• number, nan, infinity
• undefined, boolean, string, bigint, symbol, function

vartype(value, true);

• everything in loose mode, plus:
  • integer, float, double
  • error, date, regexp
  • map, set, weakmap, weakset
  • dataview, arraybuffer, sharedarraybuffer
• including typed arrays
  • int8array, uint8array, uint8clampedarray
  • int16array, uint16array, int32array, uint32array
  • float32array, float64array, bigint64array, biguint64array

• https://caniuse.com/#search=isInteger
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString#Using_toString_to_detect_object_class
• http://www.ecma-international.org/ecma-262/7.0/index.html#sec-object.prototype.tostring

MIT | @davalapar