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Copy Text and HTML to Clipboard

library to copy the string and html parameters to the clipboard

Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @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);
    }
}