svg-copier.js

// ==UserScript==
// @name         Google Sheets SVG chart copier
// @namespace    https://github.com/r007
// @version      0.2
// @description  Auto copies SVG code when user clicks on chart
// @author       Sergey Monin (https://github.com/r007)
// @match        *://docs.google.com/spreadsheets/*
// @require      https://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js
// @grant        GM_setClipboard
// ==/UserScript==

setInterval(function() {
    $("svg").off('click').on('click', function() {
        var fixed_svg = remove_links($(this)[0].outerHTML);
        GM_setClipboard(fixed_svg);
        alert('SVG image was copied to clipboard!');
    });
}, 1000);

function remove_links(text) {
    var urlRegex =/(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
    return text.replace(urlRegex, function(url) {
        return '#' + url.split("#")[1];
    });
}