• angel@iusearchlinux.fyiEnglish
    171·
    1 year ago

    Automatic Semicolon Insertion (ASI) has (sadly) been a part of JavaScript longer than 2016. I’m not sure exactly when it was introduced, but this document from 2009 already contains it: https://web.archive.org/web/20120418215856/https://ecma262-5.com/ELS5_Section_7.htm#Section_7.9

    IMO it’s bad practice to rely on ASI since the semicolons may not get inserted where you expected them to. The following snippet

    const x = 0
const y = x
[1, 2, 3].forEach(console.log)

    is interpreted as

    const x = 0;
const y = x[1, 2, 3].forEach(console.log);

    which raises a TypeError.

    There are more examples of ASI not doing the right thing on the web, so I don’t agree with “Javascript doesn’t need semicolon”.

    • kinttach@lemm.eeEnglish
      6·
      1 year ago

      As Mark Twain said, “Never discuss politics, semicolons, tabs, or religion in polite company.”

    • flying_sheep@lemmy.ml
      2·
      1 year ago

      Use an autoformatter for all code (both in the editor on save/type and as CI check).

      There is no problem anymore.