使用mailto发送带附件的电子邮件

function sendEmailWithAttachment() {
  var link = document.createElement("a");
  link.href = "mailto:example@example.com?subject=Hello&body=World";
  link.click();
  window.setTimeout(function() {
    var form = document.getElementsByTagName("form")[0];
    var input = document.createElement("input");
    input.type = "file";
    input.name = "attachment";
    form.appendChild(input);
    input.click();
    input.onchange = function() {
      form.submit();
    };
  }, 0);
}