Add a URL shorten button to the bottom left corner. It will create a new window for the shortened URL of cutt.ly
Per
// ==UserScript==
// @name cutt.ly URL shorten button
// @name:zh-TW cutt.ly 縮短網址按鈕
// @name:zh-CN cutt.ly 缩短网址按钮
// @description Add a URL shorten button to the bottom left corner. It will create a new window for the shortened URL of cutt.ly
// @description:zh-TW 在頁面左下角設置一個縮短網址的按鈕，這會開個新視窗來檢視 cutt.ly 的縮址結果
// @description:zh-CN 在页面左下角设置一个缩短网址的按钮，这会开个新视窗来查看 cutt.ly 的缩址结果
// @namespace https://greasyfork.org/zh-TW/users/393133-evan-tseng
// @version 0.14
// @author Evan Tseng
// @run-at document-end
// @include *://*
// @exclude http://cutt.ly/*
// @exclude https://cutt.ly/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
if(self==top) {
var addCuttButton = (function() {
if(document.readyState !== "loading") {
const newWindow = window.open,
CuttURL = 'https://cutt.ly/?shortenit=' + encodeURIComponent(document.URL);
let strWindowFeatures = 'width=500,height=874,top='+((screen.height-874)/4)+',left='+((screen.width-500)/2)+',menubar=no,toolbar=no,location=no,status=no',
cssStyle = document.createElement('style'),
css = `.__shorten_wrap__ {position: fixed; bottom:25mm; left:-25pt; z-index:2147483647}
.__shorten_btn__ {font: 400 11pt Helvetica; width:60pt; color:#334; text-shadow:1px -1px rgba(255,255,255,.6); background:linear-gradient(5deg, rgba(170,170,175,.85) 0, rgba(210,210,215,.8) 50%, rgba(170,170,175,.85) 100%); padding:.3em 0 1em; margin:0; line-height:1; border:1px solid rgba(0,0,0,.4); border-radius:5pt; cursor:pointer; transform:rotate(90deg); transition:.15s}
.__shorten_btn__:hover {background:linear-gradient(5deg, rgba(190,190,190,.95) 0, rgba(230,230,230,.95) 50%, rgba(190,190,190,.95) 100%); border:1px solid rgba(0,0,0,.4); box-shadow:1px 0 4pt rgba(0,0,0,.5)}
.__shorten_btn__:active {color:#cdf; text-shadow:-1px 1px #000; background:rgba(125,125,133,.8); border-color:rgba(255,255,255,.6); box-shadow:inset 1px 0 4pt rgba(0,0,0,.7); transition:0s}
@media print { .__shorten_wrap__, .__shorten_btn__ {display:none;} }`;
if(cssStyle.styleSheet) cssStyle.styleSheet.cssText = css;
else cssStyle.appendChild(document.createTextNode(css));
document.querySelector('head').appendChild(cssStyle);
let shortenWrap = document.createElement('div');
shortenWrap.setAttribute("class", "__shorten_wrap__");
document.body.appendChild(shortenWrap);
let shortenButton = document.createElement('button');
shortenButton.setAttribute("class", "__shorten_btn__");
shortenButton.innerText = "Cutt URL";
shortenWrap.appendChild(shortenButton);
if(window.location.href.indexOf("%")==-1)
shortenButton.addEventListener("click", function(){
newWindow(CuttURL, "Cutt URL", strWindowFeatures);
});
else
shortenButton.addEventListener("click", function(){
alert("Cutt-URL button does not support the URL which contains '%' character.\nPlease visit http://cutt.ly/ and shorten manually.");
});
}
else setTimeout(addCuttButton, 500);
})();
}
})();