javascript - 我怎样才能让这个电子邮件功能发挥作用？

Question

按照现在的写法，电子邮件提示会打开，但是当我单击“取消”时，我的默认电子邮件程序仍然会打开。如何重写此代码以返回 null 或 false，以便当我单击“取消”时，默认电子邮件程序不会打开？

{name: 'Email selection',
    className: 'email',
    beforeInsert: function(emailme) {
        if (emailme.altKey) {
            email = prompt("Email:");
        } else {
            email = "";
        }
        subject = prompt("Subject:", "Enter A Subject");
        document.location = "mailto:" + email + "?subject=" + escape(subject) + "&body=" + escape(emailme.selection);
    }},

Answer 1

您应该验证主题不为空，只有在不为空时才更改位置。

{name: 'Email selection',
        className: 'email',
        beforeInsert: function(emailme) {
            if (emailme.altKey) {
                email = prompt("Email:");
            } else {
                email = "";
            }
            subject = prompt("Subject:", "Enter A Subject");
            if (subject)
            {
              document.location = "mailto:" + email + "?subject=" + escape(subject) + "&body=" + escape(emailme.selection);
            }
        }},