3 ms·

Strict mode throws an error on implied globals. Use of modules forces strict mode.

• icedchai 5y ago
  And that's all "extra" syntax.
  • JoyrexJ9 5y ago
    strict mode is the default in everything now and had been for many many years.
    • icedchai 5y ago
      It isn't the default for a browser "<script>" tag.
      • xigoi 5y ago
        It's the default for <script type="module">, which you should use anyway for anything serious.