如何以跨平台方式使用主题和正文打开默认邮件程序？

function openEmailClient(subject, body) {
  var link = "mailto:?subject=" + encodeURIComponent(subject) + "&body=" + encodeURIComponent(body);
  window.open(link);
}

// 使用示例
openEmailClient("邮件主题", "邮件正文");

<a href="mailto:youremail@example.com?subject=邮件主题&body=邮件正文">点击打开邮件客户端</a>