js把文字复制到粘贴板

        function copyToClipboard(text) {
            if (text.indexOf(\'-\') !== -1) {
                let arr = text.split(\'-\');
                text = arr[0] + arr[1];
            }
            var textArea = document.createElement("textarea");
            textArea.style.position = \'fixed\';
            textArea.style.top = \'0\';
            textArea.style.left = \'0\';
            textArea.style.width = \'2em\';
            textArea.style.height = \'2em\';
            textArea.style.padding = \'0\';
            textArea.style.border = \'none\';
            textArea.style.outline = \'none\';
            textArea.style.boxShadow = \'none\';
            textArea.style.background = \'transparent\';
            textArea.value = text;
            document.body.appendChild(textArea);
            textArea.select();

            try {
                var successful = document.execCommand(\'copy\');
                var msg = successful ? \'成功复制到剪贴板\' : \'该浏览器不支持点击复制到剪贴板\';
                alert(msg);
            } catch (err) {
                alert(\'该浏览器不支持点击复制到剪贴板\');
            }
        }