Use <meta name="viewport" content="width=device-width, initial-scale=1"> as default.
// ==UserScript==
// @namespace https://github.com/NateScarlet/Scripts/tree/master/user-script
// @name Auto meta viewport
// @description Use <meta name="viewport" content="width=device-width, initial-scale=1"> as default.
// @version 2
// @run-at document-end
// @include *
// ==/UserScript==
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();