libs/modularize/isError.js
function isError(value) {
  if (!isObjectLike(value)) {
    return false;
  }
  return (objectToString.call(value) == errorTag) ||
    (typeof value.message == 'string' && typeof value.name == 'string');
}
function isError(value) {
  if (!isObjectLike(value)) {
    return false;
  }
  return (objectToString.call(value) == errorTag) ||
    (typeof value.message == 'string' && typeof value.name == 'string');
}
Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
`SyntaxError`, `TypeError`, or `URIError` object.

@static
@memberOf _
@since 3.0.0
@category Lang
@param {*} value The value to check.
@returns {boolean} Returns `true` if `value` is an error object, else `false`.
@example

_.isError(new Error);
// => true

_.isError(Error);
// => false