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Copy Text and HTML to Clipboard

library to copy the string and html parameters to the clipboard

Dit script moet niet direct worden geïnstalleerd - het is een bibliotheek voor andere scripts om op te nemen met de meta-richtlijn // @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);
    }
}