js复制网页上的内容到剪切板

  js复制网页上的内容到剪切板

2023-07-17 测试，原来的代码已经没用了，现用下面的代码，在firefox和edge上测试成功

        function aaa() {
            var txt = $('#hfDesc').val();
            navigator.clipboard.writeText(txt).then(
                () => {
                    /* clipboard successfully set */
                    alert('复制成功');
                },
                () => {
                /* clipboard write failed */
                    alert('复制失败');
                },
            );

        }

 原来的代码：

        function copyToClipboard(txt) {
            if (window.clipboardData) {
                window.clipboardData.clearData();
                window.clipboardData.setData("Text", txt);
                alert("已成功复制文本.");
            } else if (navigator.userAgent.indexOf("Opera") != -1) {
                window.location = txt;
            } else if (window.netscape) {
                try {
                    netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
                } catch (e) {
                    alert("被浏览器拒绝！\n请在浏览器地址栏输入'about:config'并回车\n然后将'signed.applets.codebase_principal_support'设置为'true'");
                }
                var clip = Components.classes['@@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
                if (!clip) return;
                var trans = Components.classes['@@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
                if (!trans) return;
                trans.addDataFlavor('text/unicode');
                var str = new Object();
                var len = new Object();
                var str = Components.classes["@@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
                var copytext = txt;
                str.data = copytext;
                trans.setTransferData("text/unicode", str, copytext.length * 2);
                var clipid = Components.interfaces.nsIClipboard;
                if (!clip) return false;
                clip.setData(trans, null, clipid.kGlobalClipboard);
                alert("已成功复制文本.");
            }
        }