js一键复制到剪切板

 

function copy() {
    let transfer = document.createElement('input');
    document.body.appendChild(transfer);
    transfer.value = '这里是想要复制的内容'; 
    transfer.focus();
    transfer.select();
    if (document.execCommand('copy')) {
        document.execCommand('copy');
    }
    transfer.blur();
    console.log('复制成功');
    document.body.removeChild(transfer);
}