function isEmpty(obj) {
  if (isArray(obj)) {
    return obj.length === 0;
  } else if (isObject(obj)) {
    return _Object$keys(obj).length === 0;
  } else {
    return !obj;
  }
}
function isEmpty(obj) {
  if (isArray(obj)) {
    return obj.length === 0;
  } else if (isObject(obj)) {
    return _Object$keys(obj).length === 0;
  } else {
    return !obj;
  }
}
function isEmpty ( obj ) { if ( isArray ( obj ) ) { return obj . length === 0 ; } else if ( isObject ( obj ) ) { return _Object$keys ( obj ) . length === 0 ; } else { return ! obj ; } }
return true when the value is "", {}, [], 0, null, undefined, false.
return true when the value is {} [] 0 null undefined false .