I know this is an old question, but this thread had the best set of answers if found. I modified Marcos's Answer above to also close the blank tab that is created if the client has an external mail handler
reference answer
JS (w\ jQuery for event handlers)
$(document).on('click', 'a[href^=mailto]', function(e) {
var checkClose, checkLoaded, event, href, i, len, loadEvents, results, t, wndw;
e.preventDefault();
href = this.href;
wndw = window.open(href, 'mail');
checkClose = function() {
console.log('checkClose');
try {
wndw.location.href;
return wndw.close();
} catch (error) {
return console.log('webmail');
}
};
t = setTimeout(checkClose, 5000);
try {
checkLoaded = function() {
console.log('loaded');
clearTimeout(t);
return t = setTimeout(checkClose, 2000);
};
wndw.onload = checkLoaded;
loadEvents = ["DomContentLoaded", "load", "beforeunload", "unload"];
results = [];
for (i = 0, len = loadEvents.length; i < len; i++) {
event = loadEvents[i];
results.push(wndw.addEventListener(event, checkLoaded));
}
return results;
} catch (error) {
return checkLoaded();
}
});
jsfiddle
Variant 1 (JavaScript):
<script>
// Open mailto links in a new tab
function mailto(email, subject, body) {
var url;
url = 'mailto:' + email;
url += '?subject=' + subject;
url += '&body=' + body;
window.open(url);
}
</script>
<a href="#" onclick="mailto('test@gmail.com', 'Subject', 'Body');event.preventDefault()">test@gmail.com</a>
Variant 2 (JavaScript):
<script>
// Open mailto links in a new tab
function mailto(th) {
var url = th.getAttribute('href');
window.open(url);
}
</script>
<a href="mailto:test@gmail.com?subject=Subject&body=Body" onclick="mailto(this);event.preventDefault()">test@gmail.com</a>
Variant 3 (jQuery):
<script>
// Open mailto links in a new tab
$('#mailto').click(function (e) {
e.preventDefault();
var url = $(this).attr('href');
window.open(url);
});
</script>
<a href="mailto:test@gmail.com?subject=Subject&body=Body" id="mailto">test@gmail.com</a>
Variant 4 (jQuery):
<script>
// Open mailto links in a new tab
$("a[href^='mailto:']").click(function(e) {
e.preventDefault();
var href = $(this).attr('href');
var target = $(this).attr('target');
window.open(href, target ? target : '_self');
});
</script>
<a href="mailto:test@gmail.com?subject=Subject&body=Body" target="_blank">test@gmail.com</a>
HTML target Attribute: https://www.w3schools.com/tags/att_a_target.asp