Auto meta viewport

Use <meta name="viewport" content="width=device-width, initial-scale=1"> as default.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name     Auto meta viewport
// @namespace https://github.com/NateScarlet/Scripts/tree/master/user-script
// @description Use <meta name="viewport" content="width=device-width, initial-scale=1"> as default.
// @run-at   document-end
// @include	 *
// @version   2023.08.27+66b8f8ff
// ==/UserScript==

"use strict";
(() => {
  // src/auto-meta-viewport.user.ts
  function main() {
    if (document.querySelector('meta[name="viewport"]')) {
      return;
    }
    const el = document.createElement("meta");
    el.name = "viewport";
    el.content = "width=device-width, initial-scale=1";
    document.head.append(el);
  }
  main();
})();