snahp.user.js

// ==UserScript==
// @name         Snahp Link Copier
// @namespace    http://stripedpurple.io
// @version      2018.12.30.2
// @description  adds copy button to Snahp link list
// @author       Austin Barrett
// @match        *://links.snahp.it/*
// @grant        none
// ==/UserScript==

window.onload = function () {
    'use strict';
    var textArea = document.createElement("textArea");
    var copyBtn = document.createElement("button");


    textArea.style.width = '0px'
    textArea.style.height = '0px'
    textArea.style.position = 'absolute'
    textArea.style.top = '-10px'
    textArea.style.right = '-10px'

    copyBtn.onclick = function () {
        copy(textArea)
    };
    copyBtn.innerText = "Copy Links!";
    document.querySelectorAll('p[align="center"]')[0].parentNode.appendChild(copyBtn);

    document.body.appendChild(textArea);
    document.querySelectorAll('center p a').forEach(function (a) {
        textArea.value += a.href + '\n'
    });
}

function copy(elem) {
    elem.select();
    document.execCommand('copy');
}