[HTML][Javascript] Mailto + Subject and Body

When we create a link that points to our mail we commonly use this:

<a href="mailto:my_email@test.com">Send me your Feedback!</a>

How about adding a subject on the email? Yes, we can also do that.

<a href="mailto:my_email@test.com?subject=my subject">Send me your Feedback!</a>

How about adding an email content? Another check!

<a href="mailto:my_email@test.com?subject=my subject&body=my content here">
    Send me your Feedback!</a>