@yhiot/utils/src/getType.js

基本工具集

var toString = Object.prototype.toString;

export function getType(val) {
  switch (toString.call(val)) {
    case '[object Date]':
      return 'date';
    case '[object RegExp]':
      return 'regexp';
    case '[object Arguments]':
      return 'arguments';
    case '[object Array]':
      return 'array';
    case '[object Error]':
      return 'error';
    case '[object AsyncFunction]':
      return 'async';
    default:
      break;
  }

  if (val === null) return 'null';
  if (val === undefined) return 'undefined';
  // eslint-disable-next-line
  if (val !== val) return 'nan';
  if (val && val.nodeType === 1) return 'element';

  if (isBuffer(val)) return 'buffer';

  val = val.valueOf ? val.valueOf() : Object.prototype.valueOf.apply(val);

  return typeof val;
}

// code borrowed from https://github.com/feross/is-buffer/blob/master/index.js
function isBuffer(obj) {
  return !!(
    obj != null &&
    (obj._isBuffer || // For Safari 5-7 (missing Object.prototype.constructor)
      (obj.constructor &&
        typeof obj.constructor.isBuffer === 'function' &&
        obj.constructor.isBuffer(obj)))
  );
}