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Narrower(右键菜单)

narrow body margin in current webpage to make it more readable. open it in right click menu, and enter percentage of margin, that it.

// ==UserScript==
// @name         Narrower(右键菜单)
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  narrow body margin in current webpage to make it more readable. open it in right click menu, and enter percentage of margin, that it.
// @author       You
// @include      *
// @icon         https://www.google.com/s2/favicons?sz=64&domain=ik4.es
// @run-at        context-menu
// @license MIT
// @grant        none
// ==/UserScript==



let value = prompt("Please enter rate %", "40");
value = value/2;
value = value + '%';

document.documentElement.style.paddingLeft = value;
document.documentElement.style.paddingRight = value;