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Auto meta viewport

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

目前為 2019-10-18 提交的版本，檢視 最新版本。

// ==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();