Reddit hide sidebbar 1.1.

reddit-hide-sidebar/index.js

 // ==UserScript==
 // @name         old.reddit hide sidebar
 // @namespace    http://hugo.hornquist.se
-// @version      1.0.3
+// @version      1.1.0
 // @description  Adds toggle to hide Reddit sidebar
 // @author       hugo@lysator.liu.se
 // @match        https://*.reddit.com/*
 // @match        https://old.reddit.com/*
 // @match        https://www.reddit.com/r/*/wiki/*
 // @match        https://np.reddit.com/*
-// @grant        GM_addStyle
 // @updateURL    https://git.lysator.liu.se/hugo/web-monkey-scripts/raw/master/reddit-hide-sidebar/index.js
 // @downloadURL  https://git.lysator.liu.se/hugo/web-monkey-scripts/raw/master/reddit-hide-sidebar/index.js
-// @require      https://code.jquery.com/jquery-3.3.1.min.js
 // ==/UserScript==
 
 (function() {
 	'use strict';
 
-    var visible = true;
-
-    let btn = $("<button>&gt;</button>");
-    let div = $("<div class='sidebar-toggle'></div>")
-
-    div.append(btn)
-    $("#header").append(div);
-
-    let sidebar = $(".side");
-    let speed = 500;
-    var active = false;
-
-    btn.click(function(ev) {
-        if (active) return;
-        active = true;
-        if (visible) {
-            sidebar.hide(speed, function () {
-                active = false;
-                btn.text("<");
-            });
-        } else {
-            sidebar.show(speed, function () {
-                active = false;
-                btn.text(">");
-            });
+	let btn = document.createElement('button');
+	let div = document.createElement('div');
+	div.className = 'sidebar-toggle';
+	div.appendChild(btn);
+
+	let sidebar = document.getElementsByClassName('side')[0];
+	sidebar.appendChild(div);
+
+	btn.onclick = () => sidebar.classList.toggle('hidden');
+
+	let style = document.createElement('style');
+
+	style.innerText = `
+.sidebar-toggle {
+	position: absolute;
+	z-index: 100;
+	left: -2em;
+		width: 2em;
+		height: 2em;
+		display: grid;
+	top: 0;
+}
+.side {
+	transition: 0.5s;
+		position: relative;
 }
-        visible = !visible;
-    });
-
-    GM_addStyle(" \
-.sidebar-toggle { \
-    position: absolute; \
-    z-index: 100; \
-    right: 0; \
-    bottom: 0; \
-} \
-.sidebar-toggle > button { \
-    width: 25px; \
-    height: 25px; \
-}");
+.side.hidden {
+	 width: 0px;
+}
+.side.hidden button::before {
+	content: '<';
+}
+.side:not(.hidden) button::before {
+	content: '>';
+}`;
+
+	document.getElementsByTagName('head')[0].appendChild(style);
 })();
+