js实现选中div内容并复制到剪切板

function copyUrl  () {

        var div = document.getElementById('xxxx');
        if (document.body.createTextRange) {
            var range = document.body.createTextRange();
            range.moveToElementText(div);
            range.select();
        } else if (window.getSelection) {
            var selection = window.getSelection();
            var range = document.createRange();
            range.selectNodeContents(div);
            selection.removeAllRanges();
            selection.addRange(range);
            /*if(selection.setBaseAndExtent){
                selection.setBaseAndExtent(text, 0, text, 1);
            }*/
        } else {
            console.warn("none");
        }
        document.execCommand("Copy"); // 执行浏览器复制命令

        alert("已复制好，可贴粘。");
    }

参见：https://blog.csdn.net/boyit0/article/details/41082941