is it possible to put a var inside a html document

Adding a subject isn't to hard. It works a lot like query language. All you do is add a question mark with subject and then define the subject.

So first I will give you an example of what it looks like to add a subject:

<a id="myId" href="mailto:jonathan@test.com?subject=My random subject!">Mail to with subject</a>

You can also, btw, add a body like this:

<a id="myId" href="mailto:jonathan@test.com?subject=My random subject&body=This is some text to start the body!">Example with a body</a>

So combine that and here is what that looks like in the script tag:

var myEmail = "jonathan@test.com";

var subject = "This is my random subject!";

var starterBody = "Just a start to the body";

// version one with the subject added:
document.getElementById("myId").href = "mailto:" + myEmail + "?subject=" + subject;

// version two with the subject and body added:
document.getElementById("myId").href = "mailto:" + myEmail + "?subject=" + subject + "&body=" + starterBody;

Hi mully!

Basically, it's possible although you have to wrap it inside <script>var variable = "variable";</script> tags. Then you can use it in HTML element with getElementById("insert-id-here").

Hope this helps!

Here is an example of what they are talking about. Given the following html:

<h1 id="myId">Hello World!</h1>

<script>
var myGreeting = "Hello Mully!";

document.getElementById("myId").innerHTML = myGreeting;
</script>

The script when run will create the variable, find the element that has the id "myId" and change the inner HTML to the previously created variable's string.

Does that make sense?

A way to do that is simply change the href value and add it to the mailto.

So for example, if I am getting your question clearly, do the following:

<a id="myId" href="#">Mail!</a>

<script>
var myEmail = "mully@teamtreehouse.com";

document.getElementById("myId").href = "mailto:" + myEmail;
</script>

The only difference between my previous example is instead of dealing with the inner HTML, we call the value of the href and concatenate the "mailto:" string with a string of the email you want to email it to. I hope that helps!

I made an example in jsfiddle. It probably makes lot more sense than my previous reply :)

https://jsfiddle.net/pruse/3fgdnjtf/

what if i want to put a var in a mail to