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Copy Text and HTML to Clipboard

library to copy the string and html parameters to the clipboard

Ten skrypt nie powinien być instalowany bezpośrednio. Jest to biblioteka dla innych skyptów do włączenia dyrektywą meta // @require https://update.greasyfork.org/scripts/491896/1355860/Copy%20Text%20and%20HTML%20to%20Clipboard.js 

// ==UserScript==
// @name         Copy Text and HTML to Clipboard
// @namespace    https://greasyfork.org/en/users/906106-escctrl
// @description  library to copy the string and html parameters to the clipboard
// @author       escctrl
// @version      1.0
// @grant        none
// @license      MIT
// ==/UserScript==

// solution for setting richtext clipboard content found at https://jsfiddle.net/jdhenckel/km7prgv4/3/
// and https://stackoverflow.com/questions/34191780/javascript-copy-string-to-clipboard-as-text-html/74216984#74216984
function copy2Clipboard(e, str, html=null) {
    if (html === null) html = str;
    // trying first with the new Clipboard API
    try {
        const clipboardItem = new ClipboardItem({'text/html': new Blob([html], {type: 'text/html'}),
                                                 'text/plain': new Blob([str], {type: 'text/plain'})});
        navigator.clipboard.write([clipboardItem]);
    }
    // fallback method in case clipboard.write is not enabled - especially in Firefox it's disabled by default
    // to enable, go to about:config and turn dom.events.asyncClipboard.clipboardItem to true
    catch(err) {
        function listener(e) {
            e.clipboardData.setData("text/html", html);
            e.clipboardData.setData("text/plain", str);
            e.preventDefault();
        }
        document.addEventListener("copy", listener);
        document.execCommand("copy");
        document.removeEventListener("copy", listener);
    }
}